> A Dominant Discourse
>  by Saatchi
> --------------------------------------------------------------------------

> Forgive and F*ck It
> --------------------------------------------------------------------------

Sunset Shimmer wandered through the halls of Canterlot Castle, flanked by two tall, white stallions. Their armour clinked and clacked as they walked alongside her, the guards themselves offering little in the way of conversation. Not that it mattered, Sunset knew she was being escorted to see Princess Celestia, a common occurrence in Equestria these days apparently. Sunset was heavily behind on her traditions especially after spending so much time in a world filled with Humans. She'd asked Twilight and Co for advice on what she should expect during her time with Celestia, but the most she'd gotten from them was a suggestion to do some stretches. The fact that the suggestion had come from Rainbow Dash meant that she'd taken it as a joke, but it didn't explain the snickering from the other ladies. Still she'd been looking forward to the moment she'd get to spend a bit more time with her former tutor. There was so much that had been left unsaid and while she thought it wise not to simply spill everything in one conversation, she could at least get some of the more pressing matters off her chest. Perhaps Celestia would do the same and the pair could work on rebuilding their sabotaged relationship back to the lofty standard it once was. 
Taking a left at the throne room, Sunset and the guards went deeper into the castle than most ever got the chance to. Memories began to come back to the unicorn as she passed by places that she'd spent time in during her youth. The kitchen was a most prominent memory, the scent of freshly baked pies forcing her to reminisce about the time she'd skipped a lesson to gorge herself on them. Celestia had found her in something of a food coma on the kitchen floor, flanked by royal chefs that had no idea what to do with her. It had taken a few days before Celestia had seen the funny side, but eventually she made sure to keep a freshly baked pie in her study. A pie that Celestia would eat during lessons, while Sunset wouldn't be allowed to sample even a crumb. Some would say it was unfair, but Sunset certainly didn't miss any lessons after that one. Taking another turn, they passed by one of the many balconies that adorned the outer walls of Canterlot Castle, this one in particular stirring up some bittersweet memories for Sunset. This was the place where she had planned out her escape from Celestia and the start of her new life among the Humans. Sunset silently cursed her younger self as the memories began to subside. Celestia had given her so much and the best Sunset could do to repay her for that was to develop a mean streak and leave for years without so much as a thank you.
Sunset was pulled from her thoughts by the pausing of the two guards outside a room she couldn't quite recall. Had it been there when she had stayed with Celestia? One of the guards removed a latch of keys from his belt and unlocked the door. Trusting Sunset knew how to open a door, he reattached the loop to his belt and resumed his guard outside of the door with his comrade. Sunset put her hand to the wood of the door and took a deep breath. This was it, Celestia was just behind this door. There was no turning back now. She pushed forward, the door creaking open with some gentle persuasion, allowing for the scent of vegetables to waft on through. Another kitchen perhaps? A dining room? Sunset pushed the door open further, enough for her to enter the room and close it behind her.
The room itself certainly wasn't one she recalled from her training, but it felt welcoming. At the centre of the room lay a long table littered with food of all varieties, along with a multitude of dirty plates. At the head of the table sat the reason Sunset had ventured into Canterlot for. Princess Celestia. She appeared to be finishing off a slice of cake, focused more on that than she was her new arrival. To her left roared a fire in a marble heath, casting a warm glow on the space immediately before it. Drawing her eyes from the clashing orange of the embers and the white tile floor, Sunset focused on the various drawers and cabinets. The tops of which were laiden with cultery, glasses and bottles upon bottles of no doubt expensive wine. The unicorn foresaw she'd be working her way through those if her nerves didn't calm down soon. Behind Celestia were several great windows, much like the ones in the throne room that detailed the feats of Twilight and Co, there were themed in very much the same capacity. However, instead of being about Twilight her adventurs in friendship, they were reminiscent of Sunset Shimmer and her time with Celestia.
"Do you like them?" Celestia asked, setting her pastry fork down on the plate that had formerly housed a slice of cake. "I had intended to show them to you upon the completion of your studentship, however-"
"I left before you could do so," Sunset sighed. "I am sorry about that, truly I am, but I had hoped we can move on from my past transgressions somewhat."
Celestia looked up from the plate of crumbs that she'd hardly touched since Sunset entered the room. "However, they were broken by a particularly violent storm the night after they were installed."
Sunset looked sheepishly at the floor, her cheeks flushing crimson as she realised how stupid she must have seemed. "S-sorry."
Celestia waved her hand, a motion that went unnoticed by Sunset. "Come, sit with me. There's a lot to discuss before the night draws in, and even more to do in such a short time."
Sunset's head shot up and she stared at the table, then at Celestia and back to the table once more. "Of course, Princess! Right, yes! Things to discuss, I suppose there is. Plenty left unsaid over the years, or is it longer than that? How does time work between the two worlds? Do we know? Do I know? We could-"
"Sunset," Celestia's tone deepened and she spoke as though through gritted teeth. "Calm yourself, there's already one Twilight in this realm, there's no need to make yourself into another."
Again, Sunset bowed her head. "S-sorry! It's just hard to know what to say, y'know? We've only met once in all the time I was gone and there wasn't a lot of time to catch up then either."
Celestia shifted her plate further up the table and brought forth another slice of cake, stabbing a dessert fork into it. "No, I'm afraid not. While my duties are simple in nature, they do demand a lot of time and effort. That, coupled with keeping Luna in check leaves me little time for idle chatter."
"Keeping Luna in check? Is she ill? She seemed fine the last time we met, though a little distant." Sunset levitated an empty plate in front of her and looked out across the food, unsure of whether or not she was even allowed to eat. There were no objections so far. "She's not infectious is she?"
Celestia took a petite bite of the cake and chewed it thoughtfully. "She's not infectious, because she's not sick." The Princess sighed. "Ever since she returned from the moon she's been trying to satiate a feeling, a lust. You've been away, so I doubt you've heard the stories and rumours."
Sunset placed several vegetables on her plate and eyed up the rest of the food, finding suitable accompaniments. "True, this is only my second time back in Equestria, though there was one thing I noticed on both occasions. Canterlot seems to be missing a lot of ponies, famous faces that I distinctly remember being here. Like what was her name? Fleur de Lis! She was an up and coming name that I remember quite vividly, but I haven't heard a thing about her. I used to see her all the time when you'd send me out on errands. Now that I think about it, Twilight mentioned a few missing ponies too, though I don't think she realised it."
Celestia raised an eyebrow, chewing on a particularly gooey piece of cake. She watched the unicorn, waiting for her to continue the story. Though there was something else in that raised eyebrow, an interest that Sunset could play an even greater role than Celestia had first considered.
"When I wrote to her in the journal, the second one, not the one you gave me. She mentioned how she and her friends had been working extra hard to keep Equestria safe, and so had deserved a break. They'd booked in a bit of time to see a concert together, one of DJ P0N-3's. The problem was that shortly before the concert, DJ P0N-3 went missing and still hasn't been seen from what I heard. Twilight said there had been a show at Canterlot that you and Luna had attended and that was the last time anyone had seen her. Weird, huh?"
Celestia paused her eating completely and set her fork down into what remained of her cake. "Yes, incredibly. Sunset, do you have any idea why I asked you here? Anything at all? Or did you simply interpret my request as a friendly get together?"
Sunset hesitated for a moment, she hadn't given it a lot of thought before now but Celestia's request had come out of the blue. "Well, yes, I admit that's what I thought. I figured that after so much time spent apart, you'd want to meet up and chat about what we've done since our last proper meeting. Is that not correct?"
Celestia paused and looked up from her cake, staring at Sunset with a stern expression. "I called you here because you abandoned Equestria and I at a critical point, throwing everything I had worked for into jeopardy. You should count yourself lucky that I encountered Twilight when I did, otherwise this conversation would be far more bittersweet."
Sunset began to feel a chill spreading across her body, that warmth of reconnecting with the Princess gradually fading away. "I'm not sure I understand, I thought you'd forgiven me for my past?"
Celestia chuckled to herself. "Hah! Forgiven you? I've laid awake for countless nights thinking about how things could have turned out in your absence. No, I have not forgiven you, but I'm happy to offer you a chance to earn it."
The Princess rose from her seat, flowing, white robe draped down her body as she did so. She stood several feet taller than the sitting Sunset and as she rose, the orange unicorn began to feel slightly light-headed. There was something in the air, picking at her senses. Her tongue began to tingle and burn with an intense spiciness, forcing her to smack her lips. In her ears she could hear the thrum of blood pumping speedily, but it was not within her own body. In fact the sound of her own blood pumping seemed to fall quiet as she listened to this powerful thumping in her ears. Her eyes focused just below Celestia's hips, where her dress split into three separate pieces, two to cover her hips and the third to cover her front. Though as Sunset watched it waft back and forth, she felt that it hid something far more sinister from view. She sniffed the air, gagging reflexively, her nostrils flaring as she drank in a new and potent scent. She couldn't quite put a finger on where it was coming from, but she recognised the effect it was having on her. The way her body heat rose, followed by weakness in her arms and legs. How her senses were being manipulated and tweaked into craving more, a mantra becoming forced into her mind. Sunset stammered as the Princess drew closer, that intoxicating aroma drawing in with her.
"I'll d-do whatever it takes," Sunset replied, shaking her head to clear the air a little and regain some of her lost sanity. "If it means we can move on."
Celestia placed a hand on Sunset's shoulder, briefly giving it a squeeze before she made her way to the dining hall door. Sunset turned her head, gasping in surprise at the perfectly plump rear on display to her. The soft sway of her rear along with the bounce of her butt, entranced the young unicorn. Her own words beginning to swim around in her head, dipping into the sensual corruption spreading across her senses. They added to the mantra in her mind, no longer focused on scents and sensations.

Anything. Everything. Whatever she says.

Were those Sunset's words? It certainly felt like what she had said and yet something was off. No, she'd definitely said that hadn't she? The desperate unicorn, so needy was she for closure that she'd offered herself completely to her former mentor. But it was ok because Sunset wanted that, so long as Celestia was able to forgive her at last. The orange unicorn watched that swinging backside all the way to the door, her mind racing over what lay behind it. She hadn't been told to follow, had she? Sunset racked her mind, no. She'd remember being told to follow because she'd no longer be sat down. She gave her head a shake but she found herself agreeing with herself even more than before. She'd have done anything Celestia asked of her now, but why was that? How had she changed in such a short space of time?
But there was no time to dwell on it, a knocking at the door drew her attention up from the shapely rear and instead to Celestia's hand. The Solar Princess rapped her knuckles off the door three times. Each tap echoing around Sunset's mind, drifting in and out of focus like a hazy dream. It lulled her into a soft embrace, those gentle taps seemingly soothing and caressing her confused mind. For a brief moment she felt peace and clarity before a hearty thump! drew her back out of it. There came another thump! followed by a third in relation to Celestia's gentle taps. The Princess nodded solemnly and sidestepped the door, turning to look at Sunset as the opposite door was blasted open with a powerful bout of magic.
Sunset gasped as the sight of a pony she'd become friends with in the other world was revealed to her. "T-Trixie? What happened to you?"
The sky blue unicorn gurlged a response, seed splattering to the floor in place of her words. Sunset recoiled and stepped back knocking the chair across the floor. The whining scrape did nothing to quell the thrumming of blood in her ears. Trixie, back in the human world , was something of a new friend to Sunset. To see her suspended on what could only be described as a mammoth meat shaft, her belly distended beyond that of a heavily pregnant mare, was more than a shock. It was devastating. She wanted to leap to her feet and pull Trixie free and escort her to safety. Her fists balling up in anticipation of her rash actions. She instead caught the eye of Celestia at the other door, who simply shook her head in response. The Princess seemed almost to regret her choice to introduce Sunset to whatever beast was responsbile for doing this to poor Trixie.
Suddenly the blue unicorn began to lurch forwardss, her eyes bulging out of her head. White liquid bubbled down her chin and into the puddle underneath her. Then as she writhed and struggled against an unseen enemy, she began to rise into the air. The potent scent of burning sex filling the air enough that Sunset got it in waves. The orange unicorn retched and clasped a hand to her mouth. The higher Trixie rose, the greater her belly swelled, the more Sunset became entranced. They had a saying for it in the human world, like a car crash you couldn't look away from.
"Trixie..." Sunset whined, her sadness worn on her face
With her cheeks flushed a deep crimson and her eyes rolled back in her head, Trixie finally fell free of her support. She fell around an inch before her swollen stomach cushioned her fall. A remnant of her former self, nothing more than the sloppy leftovers of the one behind the door. There followed a deep rumbling as Trixie loosed a final bubbling moan before falling into unconsciousness. The rumbling revealed itself to be the result of a midnight blue being crouching to fit themselves through the door. Sunset choked down a lungful of musky air, finding herself unable to close her jaw and prevent her awestruck expression.
"Sister, I may spend my days confined to my room, but I am not your pet. I have my own business to attend to, so I certainly dont appreciate the interruption. More to the point, if you're going to send your guards to collect me, at least use the more disciplined ones. Your new recruits are so weak-willed, I hardly said a thing to either of them and they were fucking like rabbits."
"Trust me, Luna, if I could have dealt with the problem another way, then I would have," Celestia's brow furrowed and she bit down hard on her lower lip. Something was troubling her about the arrival of her sister. "But Sunset must-"
Luna lumbered into view at last, her eyes gleaming with a mischevous lust. She stood over the Gross and Bloated Trixie, a long stallionhood flopped across the mare's back. She was tall, far taller than Celestia, at least ten feet tall by Sunset's best guess. Fat, cumbersome balls squatted between her legs, flanking her monstrous shaft as it throbbed to life. Her chest swelled with a vile pride, those voluptuous mounds and broad, chunky, nipples heaving with her controlled breathing.
"Sunset?" Luna asked, raising her eyebrow and curling her mouth into a cheeky smirk. "The Sunset? Former student of yours? Turned out to be your greatest failure?"
Celestia bowed her head, raising it again only to the level of her sister's semi-turgid member. "Yes, Sister. This is Sunset Shimmer and she has come to seek my forgiveness."
"Forgiveness? The same forgiveness you insisted you extended to me upon my glorious return?" Luna pinched her sister's cheeks and spread them apart as she mocked Celestia. "Oh sishter! Yow cawk ish sho gut! Gif me moar ang ah'll furgif yew!"
"S-sister please, I-" Celestia bit down hard on her lip, right hand drifting over her crotch. "Th-that's not how it happened..."
"You're right, I omitted the parts wherein you crawled on your hands and knees . Tongue scraping across the carpet in the vain hope of collecting my spilled seed."
Celestia's cheeks flared scarlet and her right hand pushed against a prominent bulge under her robe. "Sister, please, I requested your presence to d-deal with Sunset."
"And as I've told you plenty of times before, I'm not your pet. You don't get to give me orders," Luna's hand clutched her sister's chin and forced her lips to pucker up. "Perhaps I should drill that into your head, hm?"
Sunset took another step back, knocking the chair again and alerting the room to her presenve once more.
Luna's head turned to look at Sunset with all the speed of a demon-possessed alicorn. "What do you think, Sunset? Should I give you what you deserve? Or would you rather sit and watch my sister prove just how much of a little slut she can really be?"
Sunset shrank back from Luna's over-whelming presence, she didn't want to answer the question. Luna could see that, she let go of Celestia's chin and instead started to stomp on over to the unicorn. The sweltering heat from Luna's form left Sunset's skin as dry as a desert. Simply gulping down the sharp flavour of Luna's musk caused her body to tingle and dance between pleasure and pain. Staring up at the amazonian princess made her feel weak in the knees. She couldn't stop herself from trembling. The reveal of Trixie continued to play over and over in her head, ocassionally envisioning herself in the main role. Gargling ropes of seed like mouthwash, her nethers pushed to their limit and her internal organs shifted permanently. It shouldn't have felt good to her, to be so used and abused, but it did. Perhaps it was the unaticipatedly ambrosial pheremones that Luna gave off on approach, but Sunset found her senses beginning to dull. Her eyes drifting down to Luna's cock, the way it swung and bounced against her thighs. Like a hypnotic metronome she found herself tilting her head to follow it. Her mind willed her to snap out of it, just as much as it told her to wander closer. She wet her lips, smacking her tongue noisily, which drew Luna's attention. 
"I expected better from a former pupil of Celestia's," She turned her head so that she could see Celestia, fighting to keep herself in control. "Is that why she was such a disappointment to you? Because she couldn't follow your pure and virginal principles?"
"Th-that wasn't hah part of the s-syllabus..."
"And yet here we are. You, the high and mighty Princess Celestia, fighting the urge to jump before me and fuck herself senseless. While your pupil sits here completely unsure of what to do with herself. I can see it in her eyes, that blank awe, so internally conflicted," Luna sniffed the air, the smile on her lips growing wider. "I can smell it on her. Such a delectable aroma wafting up from between those crossed thighs."
Sunset squeezed her legs tighter together as though that would cut off any trace of her arousal. "P-princess I-"
"Hush, Sunset the time for words has momentarily passed" interjected Luna, grabbing the unicorn by her hair and dragging her forwards. "Let's see just how good of a teacher my whore of a sister was, shall we?"
Sliding her hand to the back of Sunset's head, she pressed the virgin unicorn against her meaty shaft. The heat was unbearable within a matter of seconds. Beads of sweat drooled down her face, splashing against the pulsing member. Her nose wrinkled as she caught the intermingled fragrance of Trixie's scent and every mare and stallion that had come before. It painted an equisite mental picture of just how much fucking Luna had done. Each unique aroma taking her back to the moment, creating the scene and giving her a front row seat. She watched as pony after pony offered themselves in body and mind to the Lunar Princess. But there was plenty of time to watch over those salacious memories later, for now it was her turn to serve Luna. Pressing her lips against the curve of the shaft, Sunset finally experienced a taste. Her mind melted as the carnal pleasure blitzed across her tastebuds. That mantra pounded in her ears once more, smashing the idea of servitude into her head. 
Taste. Submit. Obey.
"A restrained start, not that I can say the same for your mentor," Luna commented. She held Sunset's head against her shaft and snuffled around to bring Celestia fully into view. "See how quickly she succumbs to pleasures of the flesh? She doesn't know what she's missing with my touch, does she, Sunset?"
Sunset nodded as best she could with her limited movements. "Yeff, Runa!" She was rewarded with a pat to the head, which she appreciated but wasn't sure she deserved. Her agreement had come from somewhere deeper in her subconscious. A place she'd never drawn from before but now that she had she...liked it? It could have been the tendrils of arousal nipping at her brain, but giving in to Luna's whims seemed more like that right thing to do. Her body seemed to relax, falling limp as she waited for Luna's rough direction.
Celestia on the other hand had given up the battle, just as Luna had suggested. The front of her robe, thrown open to reveal a cock, smaller in comparison to Luna's monstrous phallus but certainly enough to stretch a pony. Both hands raced up and down the pink shaft as she stared on at the pair. Sunset mused over the speed at which Celestia had gone from regal and composed to a randy beast, desperate to get herself off. Sunset smirked, Luna was right after all. Deep down, the right royal Princess Celestia was nothing more than a cock-hungry slut, nothing like her sister. Sunset did her best to look up at Princess Luna, only managing to see as high as her toned stomach. Now this was what regaility looked like. Calm and in control, so composed that nothing could beat her at this game. If Sunset had been given the option of which sister she'd be serving at the moment she'd walked through the door, she'd have declined to pick. But now, as the warmth of Luna's body sent sweat tumbling from Sunset's forehead, there was really only one choice.
Luna, always Luna. 
The mantra still ran through her head, growing fainter over time as she was steadily being brought around to the idea of servitude. It was only fair that she ended up living at the whims of another. It perfectly reflected her plan to take over the students of the other world. To turn Canterlot High into her personal slave army and send them after Equestria to conquer it. Now she'd serve as the slave and the land to be conquered at the hands of a far superior being. It felt right .
"As much as I enjoy the feel of your face against my shaft, Sunset, it doesn't feel right for you to be the only one atoning for sins. Do you not think so?"
Sunset felt a hand reach down and grip at her neck, lifting her up to reach the underside of Luna's heaving chest. "What did you have in mind, Princess?"
"Well, what right does my lecherous sister have to demand you seek forgiveness, when it's clear to me that she has failed you. You see, Sunset, from the moment I arrived here I've sensed a burning passion within you. Something you've supressed for so long, no doubt since the day you first laid eyes on Celestia all those years ago."
Celestia punctuated the ending of the sentence with a breathy moan, whining as she splattered a rope of pre into the carpet. Luna smirked, her brilliant, white, teeth gradually being revealed as the smirk grew it fully fledged smile. Sunset found herself smiling too. Luna's mentality was infectious and this day was quickly being turned on its head.
"Princess, it's like you can read my mind," thoughts flashed across the smaller mare's mind. Depictions of events that she hoped the Princess could see, such lewd spectacles that one wouldn't dare speak aloud. "I was...ashamed and-"
"Hush, Sunset," Luna petted Sunset on the head once more, this time Sunset responded with a soft nuzzle against the Princess's stomach. "You do not need to explain yourself to me. For I too have experienced the hypocritical nature of my sister. She claimed herself to be so high and mighty, abhoring a life of lechery; yet she could not stop herself from leading others on. Just like you, Sunset, I fell for her act, drawing myself into intimacy with her, only for her to reject my touch with a calculating and callous attitude."
Sunset gasped, unable to believe what she was hearing. "Yes, Princess, that's exactly how it was! She was supposed to be my mentor, teaching me in the ways of magic and life. Yet every night I'd find myself only able to think about her, in direct conflict with what she was teaching me. I felt dirty, and it was one of the reasons why I left. I couldn't take it anymore..."
"Which is why I offer you the chance to seek your forgiveness another way. To acheive it vicariously, through making my sister see the error of her ways for all these years. Stand with me, Sunset and together we'll usher in a new era for Equestria. A sexually liberated landscape, free from the prim, petty, facade that Celestia would rather maintain."
Thoughts scurried through Sunset's mind, but despite the apparent confusion, her mind had never been clearer. The choice was obvious. Celestia had been her mentor for so long, guiding her through troubled times. But when Sunset had needed her guidance most, Celestia had refused to help. She was no better than Sunset, or Luna for that matter, her actions today had proved that. She still had base instincts that she couldn't control. "You have a deal, Princess!"
Luna leant her head back and roared in laughter. "Do you see now, Celestia? This is what your mentorship does to your subjects! Represses them to the point they're so easily manipulated. Sunset needed nothing more than a sniff of my regal shaft, before she was on my side. Your prized pupil, the illustrious Twilight Sparkle, dreams about being railed by every stallion in the land."
"N-no," Celestia whispered, unable to slow her strokes, even as Sunset started to draw closer.
"It's true, sister," Luna replied as she followed Sunset. "I've seen what goes on in that mind after dark. I've experienced her wanton lust firsthand in that dream realm, her techniques perfected over years of repression. Of course my personal favourite is the dream where she tries to rationalise feelings for her own pupil, Starlight Glimmer. She fights to keep herself in control because that's what Celestia would do. .
"But we know what Celestia really would do, isn't that right, Luna?" Sunset chided, using her magic to force Celestia's hands from her shaft. When Celestia fought back with her own magic, she found that it had no effect. Sunset's magic was abnormally powerful, she shouldn't have been able to fight against an alicorn. A sudden flicker of blue across Sunset's eyes told Celestia that Luna had a hand in whatever was boosting Sunset's power.
"Of course we do, Sunset," Luna retorted, a heightened confidence oozing from her voice. "Though I do wonder how the truth would affect Twilight. Perhaps it'll break her to the point of becoming a pet for you to play with."
Sunset turned to look at Luna like a puppy that had been told it was time to go for walkies. Luna was fast becoming a far greater mentor than Celestia had ever been. The way she spoke, how her words oozed over Sunset's mind like a freshly cracked yolk. Sunset was enthralled by the amazonian princess. Her eyes widened as she watched Luna levitate her sister into the air, that pink shaft bobbing needily her dark blue snout. Sunset knew she wasn't supposed to stand and gawk though. Luna demanded service with every fibre of her being and Sunset was happy to oblige. She threw herself to her knees, resting her head against Celestia's shin. Despite her evident arousal, Celestia's body was cooler to the touch. She didn't radiate the same raw, sexual, energy as Luna either, a shame but that didn't mean Sunset didn't have a job to do. Her tongue lolled out of her mouth and began to trace circles over Celestia's shin. 
Celestia gasped at the damp touch, clenching her toes as she tried to regain control of herself. The situation was spiralling out of her grasp and if she couldn't get off, then she couldn't regain it. A fact that Luna was happy to exploit. Celestia winced every time she felt that warm and ragged breath over her cock. It jerked desperately, pre drooling down her length, dripping onto her sister's shaft, before pooling into Sunset's hair. It was a foolish idea to think she could have controlled Luna and used her to teach Sunset a lesson. The endless procession or mares and stallions into Luna's bedroom should have been all the warning she needed. Yet here she was, being teased relentlessly, a victim of her own hubris.
"Y-you're nothing more than an overgrown harlot, Luna!"
Luna licked her lips and lowered Celestia down so that the pair could see eye to eye. "Bold words for someone in your position, Sister. I was so sure you'd be begging for me to fuck you senseless by now. Still, not to worry! We've got all night and my little pet is just getting warmed up."
Sunset knew Luna wasn't talking directly to her, but she could tell a hint when she heard one. She bent double and pressed her tongue into the top of Celestia's foot. The delicate fragrance that greeted her was like a breath of fresh air in comparison to the musky haze Luna gave off. It seemed obvious that a prude like Celestia would be lathering herself in scented oils. Disguising her base desires from the public, keeping that air of regality about her.
 Typical,  Sunset thought as she began to suck on Celestia's toes.  If only she'd embraced Luna a little more, perhaps things could be different. Perhaps- 
Sunset was pulled from her thoughts as she felt Luna's foot come down on the back of her head, shoving half of Celestia's foot into her mouth. Celestia squealed in delight at the forceful push, while Sunset did her best to suck on the regal flesh.
"Despite her regality, Sunset, my sister is no stranger to the kinkier side of things. Isn't that right, you little slut?"
Celestia whined again a bead of sweat forming at the corner of her mouth. "N-no, I-"
"Liar!" Luna growled, reaching up and grabbing her sister by the neck. "Denial will get you nowhere."
Luna's horn began to glow and the same blue shimmer that had flashed across Sunset's eyes, consumed Celestia's. The solar princess's horn began to glow with the same aura as Luna's. A midnight blue, crackling across her horn, intertwined with sparks of her own magic as she struggled to fight against her sister. The magic culminated at the tip of her horn, a ball of urgeoning light, fizzing intensely. The foot on Sunset's head lessened its grip, allowing Sunset to pull back and look upwards. Just in time to see the ball of light be fired off Celestia's horn and into the air above the trio. Featured in the ball of light were images from deep within Celestia's subconscious mind. Sunset couldn't believe the depths of what she was seeing. Celestia wanted to be forced to swallow tonnes and tonnes of cake, to have her entire foot swallowed and sucked by a subject, but the image that flashed up more often than not. The one thing that followed every other random thought to cross Celestia's unconscious mind, was the moment Luna had mentioned earlier on in the evening. The first person perspective of Celestia crawling after Luna, lapping at the carpet, begging for her sister to ravage her more. But there was more to it than Luna had previously let on. Not only did Celestia offer herself in body to the Lunar Princess, but the Lunar Princess took her up on the offer. 
From the moment the sphere showed Luna taking a seat on the throne, the rest of the images flashed by in a blur. But the gist of them was as clear as day. Celestia worked Luna's cock, milking it for all that it was worth. Using her mouth, her plump breasts, the cheeks of her rear, even her feet. Celestia offered everything she could to Luna, but the past version of Luna held her own. At least not until the perspective changed, rising higher until it was looking down on Luna. Sunset knew what was coming, she felt it in her own nethers. That burning heat, the tension of something so big waiting at the entrance to something so tight. It was driving her world, her hands reaching down between her legs. Instantly they were drenched as her own arousal seeped over them like honey. She turned her eyes skywards, back to the past erotic display, just in time for the perspective to shift down once more. Then back up, and down once more. Sunset gasped hotly, prompting Luna to press Sunset's head into her knee, softly stroking through her hair. The show was obscured a little due to Luna's form, but as a swelling, white, orb began to fill the perspective, she knew what was happening. Her fingers plunged deep inside herself, her moans coming thick and fast. The scene was hotter than she could have ever imagined, Luna's subtle hints didn't do it justice. But just as the show was getting to the final moments, the spell dissipated and Sunset was left without the means to finish.
"Did you enjoy that, Sunset?" Luna asked, eyeing Sunset from on high. "Would you like the opportunity to live that moment?"
Sunset paused her nether assault, her breath catching in her throat as her spluttered a reply. "L-live th-that...yes!"
"As I thought," Luna grinned once more as she threw Celestia to the ground and pinned her there with a burst of magic. She then hefted Sunset up effortlessly in her hands, as though lifting a small child.
Sunset didn't fight Luna, she simply went limp in her grip, her heat beating heavily in her chest. The only sound coming from her was a constant dripping as her fluids ran down her leg and dripped against the marble flooring. "Please...Luna, please let me live that glorious moment..."
Luna nodded, her horn glowing with magic once more. "This will be your ascension to my side, the antithesis to that waste of a transformation my sister cast upon Twilight Sparkle."
"So I'll be a princess?"
Luna scoffed. "Another princess? Feh! You'd be nothing more than a stooge to continue Celestia's puritanical reign on this land. No, you'll be something more, something just like me. But there must be commitment, there'll be no going back from this, understood?"
Sunset nodded vigorously. "Of course, princess. I want this, I want to live the moment you put Celestia in her place. I want to hear her scream for me, for you, to beg and plead for more, even after she's been so well used. I want-"
Luna placed a finger over Sunset's lips to silence her. "Hush, Sunset. You've said enough, you don't want that pearlescent tramp to get off before her time, do you?"
She didn't give Sunset time to respond, instead she tapped the tip of her horn against's Sunset's own horn, blinding everyone in a flash of light. While Luna and Celestia disappeared from view, Sunset felt the burst of magic rocket through her form. Her body tensed up, she couldn't move. Not that she actually needed to for the transformation to take hold. As the burst reached her nethers, she found the strenght to gasp as that area felt as though it had been set ablaze. She willed her hands to reach the area and put out whatever was responsible for the pain. But there was something underneath it all. A developing sensation, as though something was pushing out from her lower regions. Before she could focus on it properly, she was hit with a massive spike in arousal. Far behind anything she'd ever come across before. The mantra that had been floating around in her head, willing her into the submissive state that Luna desired, now became something else.
 Fuck. Breed. Rut. Repeat. 
The heat from her nethers spread across her entire body, which when coupled with the arousal, sent Sunset into conflict. Her mind was torn apart as she tried to rationalise and work with her feelings, that she didn't even notice that something was brushing against her thighs. A long tube of flesh swelled free from her crotch, reaching as far as her knees. Just like the rest of her body, it burned with a need to be used, to have its fill of fun, but it wasn't the only new addition. Her thighs were forced apart as two spheres the size of a grapefruit materialised. Connected to her flesh, just below the tube and hanging over her vaginal entrance, it didn't take a genius to know what Sunset had been gifted. Sunset however, could only focus on working it out in between flashes of agonising lust.
As the original burst of light faded, Sunset found some respite in seeing Luna's form once more. Like a beacon through the blistering lust that she was experiencing, she felt a sense of calm wash over her. Enough time for her to glance downwards and see just what had brought on such intense feelings. Between her legs, sat a long, orange, cock. It wasn't nearly as big as Luna's, but it was thick enough to rival Celestia's. Her new balls flanked it on either side, already in the process of crafting a hefty load for her to deposit somewhere. It was quite the sight to behold, but Sunset couldn't be happier at its presence. It even throbbed into a semi-erect state to show just how happy she was.
"Princess this is...it's incredible! Thank you!" Sunset beamed at Luna before she swung her head forward and passionately kissed her.
The Princess of the Night was understandably taken aback by Sunset's sudden motion, but she leaned into the kiss. Pulling Sunset into the sanctity of her chest, she slipped her tongue into the smaller mare's mouth. She explored every inch, crashing over Sunset's teeth, tangling with her own tongue, even testing her gag reflex. But she was quick in her movements and in just as much time as it had started, it was over. She left Sunset open mouthed, a trail of saliva connecting the pair together. But Luna knew what she was doing and it worked perfectly. When the kiss broke, Sunset immediately turned her gaze to Celestia. Her eyes burned with passion, her newly grown cock bounced against her stomach. Sunset's horn glowed and tendrils of magic snaked their way towards the Solar Princess. So lost in the heat of the moment was Celestia that she didn't notice them until a sizzle of magic caught her nerves. Immediately her own horn flared to life in order to counteract the spell, but Luna countered her counter. A blast of magic from the Lunar Princess caused Celestia's magic to fail.
"Surprised, sister? Hmph, perhaps if you'd dared to venture into the seedier sides of life, you'd have learned that orgasm denail magic can be used to supress base magical ability too. Now, shall we let Sunset continue?" Luna reached forward and took hold of Celestia's cheeks, forcing her to nod in approval.
Sunset didn't need to be told to continue, in fact she hadn't stopped despite Celestia's attempts. The tendrils of magic spread across Celestia's arms and legs, binding the former behind her back and spreading the latter apart. Celestia winced and tried to speak out against the treatment. Luna's grip proved too powerful for her to fight against and she was eventually rendered mute as a final tendril curved over her mouth. She couldn't speak. She couldn't resist. She was exactly where she had always secretly dreamed she'd be. There'd always been a nagging sensation that Luna would have told others of her suppressed nature, but now that fear was in the light. Her sister and her former student working together to show Celestia just what it meant to be liberated. Celestia's cock throbbed wildly, her cheeks flushed crimson. All her private dreams were coming true but she needed more than just foreplay now. She needed to be filled. By her sister, by her student. Her mind was at war, her prudish side made it clear how disgusting and vile she was becoming, while the other side revelled in the insults. They added fuel to the degernate fire burning within, this is who she was.
Sunset tugged on the tendrils and pulled Celestia down to the floor, the taller mare staggered and stumbled until she was down on her knees. Sunset looked up and received an approving smirk from her new mentor. The orange unicorn dropped her cock and slapped Celestia's cheeks with it. She left pre-stained impact marks on either side and brought it to rest on her snout. She left Celestia to feel every throb as blood surged through her autumnal erection. Celestia's eyelids fluttered and her nostrils flared if it weren't for the gag in her mouth she'd be practically begging for a good fuck. Sunset inched closer, bit by bit until her cock was pointed up towards Celestia's horn. Her balls enveloped her snout completely, saturating the air with a fresh ball musk. Celestia huffed away to the point of hyperventilation. She was so quick to become an addict, drinking down deeper lungfuls of Sunset's scent to keep the sexual high going. Her body spasmed under Sunset, her arms and legs twitching furiously as she tried to break her bonds and relieve the burning fire below. Sunset's horn glowed again, her magic tying in with a wag of her finger. Subtly correcting Celestia's behaviour as even more magical tendrils wrapped around her body, pulling the princess down and making her movements cease.
"Sunset?" Luna asked, crouching on the balls of her feet and placing her fingers around Sunset's cock with her thumb poking between Celestia's lips. "Would you remove the gag a moment? I think my sister has something she wants to say..."
Sunset snapped her fingers and the gag melted into a magical aura, spilling from her open mouth. Celestia gasped and panted, her breath coming in ragged pants. Luna tugged at Celestia's cheek and tilted her head so that both sisters could properly look at one another. Sunset crouched down next to her mentor, her gaze flitting between the two sisters watched with baited breath.
"Sister..." Celestia began. Her words slipped past her lips at a crawl, she murmured and rolled her eyes. If she wasn't bound in place Celestia would have wobbled in place. Swaying back and forth like a drunkard on their way home from tavern. "Sister...d-don't t-teeeeeease"
"Oh, Sister, begging is it? It's almost laughable to think that minutes ago you were so high and mighty. Ready to punish dear Sunset here for her past actions. To make her feel less for running away and abandoning purity. That's what you called me here for, isn't it?"
"Sister...Luunnaaaa" groaned Celestia, her eyes drifting down from Luna's gaze to sharing a moment with Sunset. The orange mare could have sworn she was smirking at her.
"You wanted to use me as an example of just how far depravity can go, didn't you? To give her such a shock to her system that she went racing back to your embrace. That backfired rather spectacularly, wouldn't you say?"
Sunset smiled and went to answer. Something tugged at the back of her head that kept her silent, giving Celestia time to respond.
Celestia's head lolled into Luna's hand, causing the younger sister to support her entirely. "Nooooo... There's still..."
"Still what, Sister? Time? Just how musk drunk are you right now? TIme has run out, Celestia. For you and for the will you've enforced on the public. Now it's the time of Sunset and Luna. So just sit back, relax and let your mind go. Lose yourself in what's the come. I promise it'll be breathtaking."
Luna rose to her full height once more without requesting Sunset put the gag back on. As she rose, her cock smacked against Celestia's face and lifted it up once more. The darker alicorn tutted as Celestia huffed against her cock, whining when her head flopped back out of reach of the dark shaft. Stepping forward and bending her dick downwards, Luna pushed the engorged head against Celestia's lips. The lighter alicorn gave a muffled whine of delight and willingly opened her mouth to accommadate the swollen appendage. Sunset crouched between her mentor's legs, watching in aroused surprise as Luna bend her knees. Luna's cock dropped into Celestia's mouth, filling it up after only a few inches. Her sister's eyes rolled back in her head, the light of life behind them flickered and dimming a little. She sucked in her cheeks to massage the shaft, but Luna wasn't prepared to wait for a true service. Celestia was too far gone to be that useful anymore. She just wanted to service a cock, it didn't matter whose it was, not anymore. Instead, the Lunar Princess thrust her hips forwards and down. Celestia whined in distress as inches upon inches of cock surged down her neck. Sunset moaned in horrifed delight as Luna turned her sister into a cock sleeve. She couldn't even tell whether the veins bulging from that white neck were Celestia's own or her sister's dick. 
With Celestia's muzzle pressed tight against Luna's crotch and her nostrils flared as she drank down the divine aroma, Sunset felt something resting against her head. She looked up to find Luna's ball nestled either side of her horn, their weight insurmountable, the prize within unfathomable. Sunset reached up to cradle the swollen orbs of her new mentor, her fingers digging into the pair of fuzzy blue nuts. Her hands felt as though they were on fire as though she was holding a pot from the stove with her bare hands. Her cock throbbed at the idea that Luna's cum was responsible and if so then it explained why she was so horny. There was a metaphorical fire in her balls. Sunset rose up, her hands reaching and grabbing at more of the burning flesh. Above her, Luna cooed and peered down to see what Susnet was upto. Seeing her pupil putting her own arousal to good work made her feel good. Not as good as it felt to have her dick forced into her sister's belly, but good nonetheless. It was easy to see how Celestia could become so addicted to mentoring students, the power of the situation was incredible. Sunset would have her moment in the future though, for now she had a sister to show the error of her ways.
Luna clutched the sides of her sister's face, holding her in place as she began a rhytmic assault of in and out thrusts. She pulled back enough to allow Celestia the brief belief that she was about to be permitted to breath fresh air, bringing her cock head up against Celestia's teeth. But there was no breath of fresh air to come. Instead, Luna thrust down her throat again in one complete movement. A load of pre jettisoned itself into Celestia's belly, matching the loads of several stallions in a single burst. Celestia inhaled around her cock, eyes suddenly flooding back to life as the fire in Luna's balls became a fire in Celestia's belly. Even Sunset paused her actions to see how Celestia's somewhat pudgy form seemed to swell more as time wore on. Luna didn't stop there either. Another wad of pre followed on the heels of the first, causing Celestia to wriggle in her confines. Sunset had to adjust to ensure that she didn't cause the princess internal damage even if it did seem somewhat pointless given the slab of meat in her throat.
"Sunset, ngh remove my sister's bindings. I need her free for thissss...." hissed Luna as she backed out again before pulling Celestia's head up and down the length of her cock.
Sunset didn't know what Luna had in mind, but she didn't want to suffer her wrath. With that familiar snap of her fingers, Celestia was left completely free. And she wasted no time in putting it to use. Pushing Sunset back, Celestia took over her job. Cradling and fondling her sister's balls while being impaled from the throat down.
"My, my, my, sister. So eager. Here, let me help you!"
Assisted by magic, Luna lifted her sister up into the air. Celestia's arms were reluctant to let her sister's fat nuts go, but they couldn't fight her sister's magic. She rose up until she was parallel with Luna, each princess cock head was matched with the actual head of the other. Stretching her arms out like a circus performer, Luna took her sister's shaft into her mouth. It didn'teven make half the dent that Luna made in Celestia but both Princesses gave a sharp trill of delight. Sunset moved out from under Luna and Celestia. She stood off to the side, stroking her cock at the sight. Two towering alicorns sucking each other off without a care in the world. Sunset couldn't help but feel a little jealous at the sight. She wanted to be the one to teach Celestia just how wrong she had been all those years ago. She wanted to be the one to make her attone for all the grief she caused Sunset, directly setting her down that rebellious path. Her body tensed, her orgasm was building with such speed and Luna and Celestia didn't appear to even be close.
Pre-dribbled down the sides of Luna's mouth, while it gushed from Celestia's. The pair at opposite ends of the performative spectrum. A quick glance to Luna's side and she saw her pupil watching and jacking off to the sight. The look on her face spelled it out for the dominant princess. She felt like she was missing out and Luna understood that well enough. But she had a remedy that could give Sunset the sexual closure that she sought. Her horn flared to life once more, widening the psychic bridge she had set up earlier. Originally she would have used such a thing to exert greater control over Sunset, but she had proved to be far more susceptible to Luna's whims. So instead she simply transferred their minds between the two bodies. Putting Luna into Sunset and Sunset into Luna.
Sunset gasped. The world suddenly felt much smaller and her body felt so much warmer. A pair of white legs were splayed before her, while her throat was full of what she assumed to be alicorn cock. There was a potently sweet musk emanating from a pair of snowy white balls slapping against her snout. She glanced to the side to see herself, or rather the body of Sunset Shimmer on her knees. Hands gripped firmly against her cock, shooting an impressive load onto the already stained marble. But if her body was over there, then that meant...
Celestia groaned wildly around Luna's cock and Sunset felt the first dribble of orgasmic cum splash into her throat. She smirked, finally understanding what Luna had done. She wanted to offer verbal thanks to the Princess but she had another idea. One that Luna herself would be proud of. Before the first proper salvo of cum exploded down her throat, she pulled Celestia's cock from her mouth. Keeping Ceiestia held upside down with her magic, she turned the solar alicorn to face the post-orgasm Sunset/Luna. Raising her hand into the air she delivered an almighty smack to Celestia's plump rear. The sound of her palm connecting with the plush flesh of her ass echoed around the dining hall. Celestia cried out in bliss as several ropes of pearly cum exploded towards the orange mare. The smaller unicron was buried under the sticky salvo, but the slaps kept coming. The intensity of the orgasm growing steadily stronger with each powerful smack. Before long there was nothing more than a writhing mass of white as the unicorn revelled in the moment. 
Celestia's eyes fluttered as her mind struggled to stay with it. Post-orgasmic clarity couldn't come soon enough for her weakened body and mind. She just wanted to rest, but Sunset wasn't about to let her go without offering forgiveness. Clasping her midnight blue hands tight onto Celestia's ass, she pushed the alicorn down as far as she could. Hilting her cock inside the velvety insides of her former mentor. Celestia kicked and squirmed with the last of her strength, but it wasn't enough to fight back against the ensuing storm. With a powerful roar, Sunset acheived orgasm. Those burning orbs hanging between her legs fired load after load into the solar stomach. Cum audibly sloshed and gurgled as her belly began to swell. She blimped up to twice its original size in a matter of seconds but Sunset kept cumming. Celestia's stomach tripled in size, then quadrupled until she was pushing against Sunset, pushing her back and removing that shaft from its sleeve. Even with the amount being spilled on the flooring, pooling around Sunset's feet and washing over the tiny cum-covered mare below, Celestia continued to balloon upwards. By the time the head pressed against Celestia's teeth she was spilling more than she was drinking. Sunset's darkened blue hues were splashed with white and Celestia was leaking cum through her mouth and her nose before the shaft popped free and fired a final few salvos into the air. They rained down around them like a sticky and sexy rain. Sunset staggered back, her legs feeling weak underneath her. She'd never cum like that without a dick and she was almost certain she'd never do so again with one. 
As she struggled to retain her strength, her mind seemed to be pulled away from her form. The white of Celestia swelled until it consumed her vision. The potent sting of Luna's cum burned at her nostrils and eyes, pressure bore down on her form. She took a sudden breath, sitting bolt upright as something boomed onto the dining table. Sunset wiped the cum from her eyes and licked it from her lips. She was back in her own body now and Luna was rightfully back in hers. She still felt woozy from the sheer overload of her senses but she was able to stand. She made her way to dining table and took her seat where she had been when this sordid affair had began. Before her sat the bloated and spherical form of Princess Celestia, grotesquely out of shape and bubbling at the mouth. Her breaths came slow and steady much like her words had been during the sexcapades. To her left sat Princess Luna, reclined in her sister's seat, feet propped up on the table either side of her sister's head. She cleaned off a thick blob of cum from her fingers before looking to her student.
"So...have you forgiven my sister for her actions against you, Sunset?"
Sunset looked to Luna. She smiled at her mentor before looking at the swollen Celestia. "Hm..."
"I can understand if you feel that things are not yet resolved. You were gone for so long after all, Celestia didn't even bother to look for you. Did you know that? She knew where you were and she didn't dare come to find you. With such a lack of care on her part, you no doubt feel as though she can't be forgiven.
Sunset couldn't deny that she felt a little hurt to learn that Celestia had known where she'd run off to. She could also understand the trepidation of not knowing what awaited you on the other side of the mirror. But she still felt the bitter pang of being lied to and told to supress her inner desires. There'd be no more of that with Luna, the Princess of the Night would care for her and accept her more than Celestia ever would. Sunset would show her that in due time, with Luna's help of course.
"We're getting there, Luna." There came a thump from the underside of the table. "But I think she still has a lot to learn, don't you?"