> Poof > by Clopficsinthecomments > -------------------------------------------------------------------------- > A new spell > -------------------------------------------------------------------------- “It’s a brilliant spell Spike.” “It’s a weird spell, what possible reason could there be to instantaneously swap you with Princess Celestia via magical teleport?”  Twilight rolled her eyes and shook her head with frustration. It wasn’t the first time that her annoying lab assistant had to ruin her excitement at a brilliant new piece of spell-crafting with his down-to-earth, rain-on-your-parade ‘logic’. Why couldn’t he see that a reverse-inverted teleport matrix, woven through a thaumic teleport field array created a beautiful symmetry that allowed for extreme distance teleports, so long as both of the targets were alicorns? “There’s plenty of reasons! Like…” Twilight chewed her lip. “Like…?” Spike crossed his arms, looking expectantly at her. He was so annoying! Why didn’t he see the elegance? Anchoring a teleport to two alicorns gave it a huge amount of potential energy, enough to require only the lightest touch of magic to kick off the complex spell, which would then swap the two alicorns across vast distances at almost negligible cost! There had to be some use for the spell! “Like… if I need to get to Canterlot quickly so that I can speak with…” “Princess Celestia… who would be in Ponyville.” Spike arched an eyebrow at her, shaking his head sadly. “OR… or…” Twilight hummed, her mind racing for reasons. “What if Celestia was in danger, about to be kidnapped by some evil menace?” Twilight slammed one hoof into another excitedly, her confidence rising at this new use-case, “I could -” “Swap with Celestia, putting you in just as much danger as she was in?” Spike spread his hands in confusion, still shaking his head. “Maybe I could handle the danger better!” “Than Celestia?” “I said, maybe.” Twilight groaned. There had to be some use for this spell… it was just too good to be relegated to her big book of arcane arcana! Too many of her brilliant spell-matrices ended up there, useless works of magical art... like ships in bottles: fun to look at, but not much else. “Heh, maybe you could swap yourself with Celestia so I could ask her if she can think of good use for your new spell.” The diminutive dragon chuckled, grinning impiously at her. ‘That was it!’ “Spike, you’re a genius!” Twilight brightened, charging up her horn. “What? No, I was j-” “We can use this spell to have Celestia give you information and directions directly!” The glow on Twilight’s horn grew brighter and brighter, filling the map-room with blinding light. She giggled, eyes widening with too much intensity - she loved her spells, and if Celestia could find some way to rescue this one from the refuse bin, she’d be over the moon! “Twilight no, she has dragonfire messag-” “I’ll let her come up with some good ideas for the spell, make sure you write them down when she’s here Spike!” Twilight laughed, cutting off her assistant. It was one of those laughs… a laugh that betrayed that the mare was a little too excited about the intellectual pursuit in question. It didn’t even click that perhaps she should have asked the princess first. “Twilight! No!” *CRACK* *POOF* > Oh. Hey Twilight. > -------------------------------------------------------------------------- Lost in the debate about the utility of the spell was some very simple issues with the amazingly artistic thaumaturgy that Twilight had just created. First and foremost, there was more than one alicorn. If either Spike or Twilight had taken some time to think about the nature of the spell, they might have realized that swapping Twilight and Luna would permit the instant and effortless teleportation she’d imagined… though it might have given the lunar princess an unexpected Ponyvillian vacation for the duration. But when it came to all things alicorn, Twilight tended to focus on her mentor to the detriment of the other two mares, Luna and Cadence. When she cast the swapping teleport spell, the energy rippled through Equus’s thaumic field, looking for another great source of magical energy, like an asteroid falling in toward a gravity well. In most circumstances, this would have been Celestia, located only a few hundred miles away from Ponyville… or her sister, located in the same castle… In this particular instance, Luina just so happened to be closer to Ponyville - the tower of the moon was located further south in the castle layout than the royal dais. But, Twilight would not be appearing in Canterlot at all. By random chance, Cadence and Shining Armour were only a hundred miles from Ponyville. The prince had presented his beautiful wife with a private, romantic zeppelin cruise for their anniversary a few months prior. It had taken some time to arrange their schedules and some cajoling to convince Sunburst to foalsit their daughter Flurry Heart for an entire week, but they’d finally managed to pull it off… And now they were making up for lost time. Making up hard. So it was that the swap spell snaked outwards from Ponyville, spiralling in toward Princess Mi Amore Cadenza’s location as she enjoyed some very intimate time with her husband… Twilight’s brother… Shining Armour. The energy tendril connected. *POOF* A huge cloud of smoke engulfed Shining Armor, filling up the luxury cabin and obscuring his vision. He coughed and sputtered, blinking to clear his vision. “Wow, honey, you should have told me you were close…” He chuckled. He was balls deep in his beautiful wife… when the sudden cloud of magical vapor had appeared, engulfing him - obviously the result of some magical overflow. “Ughh….wh-wha…” ‘That voice sounded strange…Oh f-fuck… she’s really clenching down on me…!’ He reached down and tapped the mare on her shoulder. “E-ease up hun… you’re gonna snip me off if you keep clenching like that…” “Sh...shining?” A groggy, confused voice came from underneath him. As the last of the fog cleared away, Shining’s mind raced to understand what it was seeing.‘P-purple fur… dark purple mane… purple eyes… wings… horn… a magenta streak… the unicorn under me is….!’  “T-T-TWILIGHT!?” “SHINING!?” Her eyes shot open with alarm, she was staring right at him. “WHAT THE BUCK IS GOING ON!?” Shining shouted, half whinnying in panic… right below, him… under him… around him… where his beautiful wife had been just a moment ago… was his little sister! “AHHHHHHHHHHHHHHH!” Their two voices echoed through the cabin, the sibling screaming in terror at the sudden scenario they found themselves in. Shining couldn’t help but buck and jump, instinct causing him to try to shake his little sister off of… him… as quickly as possible. “S-stop! STOP!” Twilight squeaked at him. “What the buuuuuck!?” Shining whinnied again, just managing to avoid kicking and shaking again. “Wh-why the buck are you… inside me!?” Twilight screeched, staring straight up at him, flicking her eyes downward with panic as she did so. “I DON’T KNOW!” Shining yelped. He could feel Twilight’s smaller body pressed up against him, her belly pressed against his… but most of all his felt the burning, twisting, clenching tightness below. Not that Cadence didn’t have one of the most voluptuously velveteen vaginas to ever grace the planet - she was the Princess of Love after all. But still - that babymaker had already fired one round and, snug as it was, it didn’t hold a candle to his little sister’s pussy. ‘My little sister’s pussy!’ Why. Why did he know how tight his little sister’s pussy was!? She grimaced, squinting her eyes and clenching her forelegs against his upper back, wincing. “O-oh f-fuck… I can… feel you!” “WHY ARE YOU… HOW DID… WHAT!? What!? What.” Shining’s confusion finally began to overtake his shock and fear, and his voice began to reverberate less in his ears. “I… o-Oh… I m-must have… mnn…” Twilight tried to explain, but she kept pausing, her breath hitching. Each time she winced Shining could feel her… her… clench around him even tighter. “...s-s-wappped… into the Princess’s b-body...mmnf! B-buck it’s st-stretching me…” Shining heard Twilight whisper under his breath about how his cock was stretching out her marehood. He was horrified to feel a pulse of throbbing arousal at her accidental compliment race through him. He felt his stallionhood twitch inside her, felt it rub against her inner pink flesh. His sister’s flesh. ‘Buck why does it feel so good!?’ “O-oomph! St-stop t-witching!” Twilight snarled, closing her eyes to try to focus. “No, you stop squeezing!” “W-why were you… mmn…! Bucking PRINCESS CELESTIA!?” Twilight grunted, finishing her statement with a snarl and a glare. “I WASN’T!” Shining growled back down at her. “Cadence and I were having a relaxing and intimate love-making session when all of a sudden there’s a poof of smoke and all of a sudden I’m balls deep in my…” “...” Twilight stared up at him, her cheeks going redder and redder, face flushing to the color of a tomato. “...s-sister…” Shining finished, the lump in his throat barely making it out, in a little croak. “O-oh m-my G-goddess…” Twilight squeaked with embarrassment. “My BBBFF is… inside me.”  Shining felt the heat in his own face burning and swelling with shame. A sickly feeling was quickly replacing the shock that he’d felt in his gut - here below him was his younger sister. The mare he’d given horsey-back rides to… the mare that he’d taught how to fly a kite… the little filly he’d grown up with, side by side… Affectionate, yes… but as siblings. As brother and sister. He still found it awkward to hug her. And now he was… well… they were… fucking. “I-I… must have gotten something wrong with my spell… I was supposed to swap with Celestia…” “Oh.” “Oh? OH!?” Twilight growled. “That’s all you have to say!?” “Well excuse me, Twily… I haven’t exactly practiced my responses to when a family-member magically appears on my…” He stopped short of saying the word… but it didn’t change the clenching squeeze around his stallionhood - Gods he could feel the ripple of milking mareflesh ripple down his length! “...s-sorry…” “...” “...” “...wait… sorry for shouting, or sorry for clenching on my-” “SORRY FOR SHOUTING! I CAN’T HELP THE OTHER THING!” Twilight groaned, throwing her head back. “Ah.” “Just… let’s just uh… disconnect and then we can talk about this…” “OK, OK…” Shining sighed, hanging his head with shame and trying to bury the horrifying feelings of disgust and fear… and arousal… bubbling up in his stomach. “...Shining…?” “Yeah?” “WHY CAN’T I GET OFF OF YOU!?” Twilight shouted, wiggling and struggling under him. ‘Holy b-buck! When she moves her hips like that… f-fuck!’ Shining armor bit his lip to clear the flood of pleasure from his mind and respond to his little sister. “P-probably because of all the binding straps…” “Ah.” “Yeah…” “WHY ARE THERE BINDING STRAPS!?” Twilight kicked out uselessly from underneath him. An elaborate system of hoof and back straps held her belly tightly to his belly. Belly-riding was what Cadence had called it. A mare was essentially bound to the underside of her stallion, upside-down. It let the stallion walk around as per usual, albeit with a heavier weight to carry… all while still rutting his female, like some kind of obscene sex-flesh-toy. “C-cadence l-likes to use it when her legs get tired from when she’s r-riding-” “Ahhh!” Twilight groaned. “Too much information, too much information!” Shining looked down at her with a skeptical and cocked eyebrow. “Twilight, right now my dick is literally in your…” “Way too much information!” Twilight squeaked, shutting her eyes. “Okay, okay… I’ll just… I’ll undo the straps and… Shining… why… why am I wearing a magic-restrictor horn-ring?” “Umm…” “Why are you also wearing a magic-restrictor horn-ring!?” She yelped, eyes wide with panic. “Th-thursdays is earth-pony style day where we both pretend like we don’t have horns, and Cadence gives me the earth-pony-size potion so th-” “I don’t wanna know!” Twilight whined out, exasperated. “How do you get out of the straps then… o-oh…. F-fu...mmmf!” Shining felt a flush of heat roil through his face as he watched his little sister squirm and moan under him. A rippling rhythmic series of contractions clenched at his cock, little obscene grasping squelches loud enough for both of them to clearly hear coming from down below. And he could swear that he felt her tight body cavity get even hotter. He was ashamed to feel his body naturally make his thick stallionhood pulse with excitement. “D-did y-you j-just….?” “NO!” Twilight bit off quickly, looking at her big brother with angry, sparkling eyes. “J-just a mini… ahem… how do you get out of these?” She strained against the bindings. “Oh. They’re enchanted to release when you say the secret keyword.” “Thank Celestia, say the word so we can get o-” “I don’t know the keyword.” “Oh.” “Yeah.” “...” “WHY DON’T YOU KNOW THE KEYWORD!?” Twilight screeched, throwing her head back (in this case down toward the floor) with fury. “They’re Cadence’s bindings! I left my bindings at home!” “Why do you have two…. You know what, never mind. Are you saying we’re trapped like… this?” Twilight gestured down their bodies toward their… union… with her eyes. “I… think so…” Shining sighed. “Oh… oh no…” Twilight despaired. Then her eyes blinked again and she looked up at her brother. “W-wait! You said… you said you took an enlargement potion, right?” Shining swirled his tongue inside his mouth, tasting the last remains of the strange banana-flavored Zebrican brew. It probably wasn’t the best time to mention to his little sister that he had lapped the mixture right out of Cadence’s… cleft. Not only was it a sexier, but it often helped with penetration if Cadence’s cavern was a bit over-sized for earth-pony Thursday as well. “Yep.” “OK! Ok. So… all we have to do is wait for the potion to wear off, then we should get a little wiggle room and I can wriggle out of the bindings, or at least get off of your… uh…” Shining arched an eyebrow as he looked down at his sister. “Your penis.” Shining swallowed. Why did hearing Twilight say penis sound so damn… hot!? “Shining.” “Y-yes?” “Why did that make your penis throb? H-hey it just did it again!” “Stop saying penis!” “Penis is the correct term!” Twilight groaned as he throbbed in her again - damn treacherous dick! “Y-you did it again!” “S-sorry… sorry… it’s just… when you say that it’s kind of… c-cute.” “...” “ANYWAY!” Shining blushed and stared away from his sister. “About your p-potion idea…” “Y-yes?” “See the thing is…” Shining gulped, guiltily looking back at Twilight’s face, meeting her accusative eyes. “I… uh… I had taken it just before you showed up… so I haven’t really… enlarged yet.” He could see the color drain out of Twilight’s face, her mouth dropping open. “W-what.” “Yeah.” “You mean… th-this…!” Twilight clenched around him, unnecessarily providing a physical stimulous to remind him what she was referring to. “Is your normal size!?” “S-sorry…” Shining meekly offered, ears folded back. He couldn’t think of any time that he’d apologized for being too big. Then again, Cadence was his first and only lover. “H-how!?” Twilight moaned mouth parting with exasperation. “H-how d-do you have s-such a b-big… cock!? MmmF!!” She squeaked out as he throbbed inside her. “H-hey!” “Ixnay on the ockcay!” Shining begged. “That’s what it is! It feels like its in my damn stomach! It must be…” Twilight let her statement trail off. “It’s about seventeen inches long, maybe nine inches around.” “Y-you measured!?” Twilight asked with a look of disbelief. “I thought you liked science!”  “Seventeen and nine!?” Twilight blinked. “That’s l-like…one point nine times bigger then Flash Sentry.” “Wait…. You measured!?” “I like science!” Twilight groaned.  Ever shout was making her body rub against his. He could feel his little sister’s tight, hot, clenching marehood starting to drip down his shaft… could feel the press of a fat love-nub against the top of his ebony shaft. Both siblings shuddered together, the shiver rippling through them and making their fur stand on end. For a moment, all they could do was gasp and pant, staring at each other. Then the moment was gone. “W-wait… Flash Sentry!? That little punk from the royal guard!?” Twilight rolled her eyes at her over-protective older brother. “It was just a short summer-fling and he’s not that b-” “He dared to talk to you, go-out with you… touch you - without asking me first!?” “See, this is why I never had any boyfriends through school! If you didn’t go so crazy all the time, maybe I wouldn’t have had to lose my v-card to Flash when I’m halfway to thirty!” “He took your virginity!?” Shining felt his temper rising. His nostrils flared as he imagined a stallion mounting his little sister! He stomped his hoof and flexed instinctively throbbing his rigid length taut deep inside Twilight cunt. “He’s dead.” “Mmmph!” Twilight squeaked, momentarily distracted before looking at her bother with a grin. “Sheesh, Shiney… it’s not like you need to be jealous or anything.” “Jealous?” Shining looked down at her with confusion. Twilight’s eyes flashed downwards and back up at him again, and her blush bloomed two shades brighter. “Ah.” “...” “...” “I mean… Flash was sweet and all… but… wow... “ Twilight mouthed with an O, wriggling her body around him. “Are other stallions like this?” “Other stallions? ...Twilight…” Shining growled down at his little sister. “Seriously… How does Cadence handle you?” Twilight asked with genuine curiosity. “Twilight…” Shining could feel his heart beating faster as his cute little sister went on about his endowment… an endowment she was currently half-impaled upon. “No wonder Flurry came out so fast.” She mused with excitement, as though she’d just figured out a puzzle. “Seriously...not even Rarity’s toys are this… uh... “ “...” “Sorry, kinda got carried away.” “It’s OK.” “...seriously, mom would be proud.” “TWI.” She giggled, mischievously. “Sorry, couldn’t help teasing you a little bit, big bro.” And just like that, she’d somehow managed to switch back to the adorable and beloved little sister that he had known all his life. For a moment at least. Before the drip of her mare-juices off the end of his balls reminded him of the situation they were in. His stomach burbled and rumbled. He felt a growing warmth spread out through his limbs, to his muscles and flesh… and… parts… ‘Uh-oh.’ “T-twi?” “D-did you just…” Twilight half-groaned, her breath catching in her throat, cutting her off. “I think…” Shining moaned as he felt the straps begin to bite more into his throbbing muscles. “...g-get bigger?” Twilight finished, with a gasp. “...the potion’s kicking in.” “O-oh… BUCK.” > BIG brother > -------------------------------------------------------------------------- Shining groaned as the pulse of magical energy surged through his body. It was always such a strange feeling... like his skin was being stretched too tightly, bursting outwards as his body and muscles surged and rippled under its taut outer layer. The sag of his balls was even stranger, his two orbs bulging and sinking with their sudden added heft, causing a strange tension in his guts as the sensitive bits pressed against one another before his sack finally expanded for their new, hefty size. And his cock. It came in waves, like it usually would when he and Cadence played with the potion. Every two or three seconds… first a wave would make him thicken - his already fat black base getting vascular and girthy… then the next would throb out his length - stretching outwards a half-inch at a time… then one would reach his cockhead - blossoming his knobby unflared head wider, flatter… Usually, he wasn’t inside Cadence when this happened. And definitely he wasn’t inside his little sister. “O-oh… oh… oh f-fUCK!” Twilight moaned and threw her head back as one his girth throbs stretched her with an audible squelch. “T-twi…” Shining gasped, barely finding the breath to be able to speak in between the intense sensations of his body bulking into the physique of a large earth-stallion. He could feel Twily’s… his little sister’s… pussy celnching all around him, her tight walls not able to handle his growing size. “S-sh… Shiny... i-it’s... “ Twilight panted, her eyes wide with sensation as she looked up at him. Another wave slid through him, and he felt his cock slip deeper into the smaller mare’s depths, pressing against some pink-flesh obstruction deep within her small body. “...mnngh! ...t-too… m-much…” She groaned tucking her chin to her chest and shutting her eye. Shining could feel her whole body coiled around him, tightening up with tension. Small tremors shivered through her velvet, twisting tunnel. With broad, muscular, shoulders and heavy, powerful muscles he felt the potion finishing the transformation of his body into what amounted to an earth-pony physique… But there was one last big, final wave coming. He tried his best to warn his sibling.  “Oh. F-fuck Twi!” A huge pulse rippled through his phallus. Everything straining at once, his fat base expanding to the size of a foreleg… his whole length four inches longer than before… his saucer-plate shaped head trembling with blood-pressure… and his donut-shaped medial ring sliding into the stretched pink inner princess pussy-lips of his little sister, bumping right past her engorged clit as it did so. “OH Fuck! Sh-shiny…!” Twilight eyes shot open in panic, pupils shrunk to pinpricks. She was gasping and hiccuping as she squeaked with convulsive bounces. She was blinking and thrashing her head, trying to hold something back, in a desperate fight to maintain control.  A fight she was losing.  “Oh, b-buck… I’m… I’m…. Sh-shinnnneeeeeeeeeeeeeeeey!!!” Shining felt his little sister clench her forelegs even tighter against him, drawing her body up against his with an arched spine, trying to press herself as hard as she could against his belly. Rolling contractions rippled up the length of his buried stallion-cock, milking waves of sucking clenches, each tighter than anything Shining could have ever imagined. “Ah! Ah! Ah! AHHH!” Staccato yelps came with each of her convulsions. He felt Twilight’s hips tilting and grinding up into him for the first time, sinking more of his massive, fat cock inside her with each orgasmic shudder. The sensation of his little sister’s hot, swollen, winking clitoris grinding against the top of his shaft as it slid in and out with Twily’s spasming muscles was surreal. “F-F-FUUUUUUUUU…….!” Her shout rumbled through her ribcage, an animal cry of pleasure… He felt hot blasts of sticky wetness splattering all over his balls, his inner thighs, his stomach as she coated him in a splattering spatter of her sticky filly-ejaculation. Wet and sloppy slaps accompanied her shudders, as her hips drove her soaking pussy against his body. All Shining could do was hold on, desperately clenching his jaw and trying not to get lost in the lust of the moment - the burning heat engulfing his cock, the wet slapping sounds, the moaning mewls of a mare. This was his little sister cumming on his cock. “….UUuuuuuuunnghhh……” Her scream finally petered out - as did her shaking, straining, humping orgasmic convulsions, slowing and finally stopping as she went limp in the bindings… leaving only a dripping mess of clear mare-nectar waterfalling to the ground underneath them in gossamer strands. . He felt her fore-legs go loose around his shoulders, Twilight resting in the tight embrace of the bindings with exhausted, gasping little breaths as she struggled to recover from her orgasm. Shining watched her, her rosy cheeks wet with tears of exertion… her brow and mane tousled and sweaty… eyes closed gently as she savored her post-orgasmic cocktail of pleasure… her pacific, contented-smile…  ‘Why is my sister so damn…. cute?’ He watched her, trying his best not to move… not to react to the odd quiver or clench of her hot snatch around his cock… trying not to breathe on her ecstatic face. Trying to give her a few minutes of what seemed like joy. But her eyes fluttered open af last - dopey, drunken rolling pupils looked up at him with a silly grin… his sister was still high on the potent sexual neurochemical flush. “Y-you OK, Twily?” Shining asked, trying to avoid the mirth creeping into his voice at the sight of his spaced-out sister. This seemed to bring Twilight back to herself. She nodded groggily at first, blinking, again and again, to clear her eyes of the fog. Her head shaking slightly to get some blood flow back into her head. “Mmm...hm…” All at once, her consciousness seemed to rush back to her. He could see the change spread across the features of her face from pure, unrestrained pleasure… to mortified embarrassment.  She blinked away tears, whether of embarrassment or exhaustion he wasn’t sure - but the last thing he wanted was for her to feel upset. “Twilight it’s perfectly-” “I don’t wanna talk about it!” She squeaked, puffing her cheeks out and looking away to the side. “Ok, sure.” Shining turned his head politely to the other side as well, giving his sister what space he could - despite the fact that he was invading her personal space with at least twelve inches of his body. A wet dripping patter made the silence less than sustainable. “I can’t believe I… came on my brother’s… dick…” Twilight muttered to herself. “Do you always… are you always so… splashy?” Shining asked, Cadence never soaked his balls this much. Twilight turned to look at him, fiery fury in her eyes. She glared at him for a moment before finally responding. “...N-no.”  “Ah… well… sorry.” He sagged slightly. It was hard to focus on not putting his hoof in his mouth when every other moment a clench would remind him he was deep inside his sister’s cunt. Twilight let out a sigh under him and shook her head. “D-don’t be… you didn’t… do anything wrong…” “S-still…” “And… it... “ She tucked her chin down, avoiding looking at him as she squeaked out, barely audible… “...you… felt good.” “Ah.” Shining stared away from his sister, not wanting her to see his face in that moment. “Y-yeah.” Shining felt a set of squeezes pinching the base of his cock, in a rhythm that could only be deliberate. He quickly turned and locked eyes with her… she was looking back at him shyly, but with some coy curiosity mixed into her grin. “Do I… feel good?” Twilight asked, a small squeeze hugging his cock as she did so. “T-Twily!” Shining stammered. “Wh-what?” “You’re my little sister!” “So?” “So I can’t tell my little sister that her pussy feels amazing! That’s just… wrong.” Twilight giggled slightly and blushed. “It feels… amazing?” “...T-twi…” “What? C’mon… w-we’re stuck like this anyways…” She stammered. “I’m still a mare y-you know… I could use a little confidence boost.” Shining felt his heart melt a little bit. He’d always tried to convince the socially shut in Twilight that she was far more attractive than she thought she was… “T-twi…” “W-we used to share everything with each other. No secrets right?” Twilight hurriedly added. As if that applied at all. “Remember?” Another milking quiver as her purple cunt contracted around his throbbing black length. Shining found himself reciprocating humping forward with a jerk of his groin muscles, throbbing his cock inside her and jamming the edge of his head’s ridge against the fleshy ceiling of the deepest part of her vaginal wall. “Mm!” Twilight squeaked with surprise. Sexy, pleasurable surprise. Damn why was she sounding so hot!? “S-sorry…” He muttered.  “D-don’t be… your cock feels freakin’ amazing.” “Twi!” “What!? It does - I’m gonna have to go and replace all my little toys with the extra-extra large size ones.” She giggled. “I never realized I would like… big ones so much.” She looked up at him with a coy eyebrow. “Maybe I could use one of those clone-a-stallion packs on you?” “Twilight!” He sputtered, thoughts of his little-sister masturbating herself on a silicon version of his cock filling his mind. “Stop!” “Oh come on…. Maybe I’m just a bit giddy, but...” Twilight laughed aloud. “We’re stuck like this anyway… might as well have a good attitude about it… I won’t stop teasing you until you tell me.” “Tell you what?” “Tell me what…” Twilight bit her lip. He felt another squeezing clenching hug around his cock. “...you think of me…” “...” Another squeeze, this one hard enough to press her fat clit against him. “Fuck it.” Shining breathed. “Your body is so damn sexy Twilight… you feel so bucking good.” Twilight stopped giggling, a deeper blush replacing her rosy cheeks. Both siblings fell into silence. No squeezing or twitching. A few moments later, Twilight spoke up. “Shiney… I love you.” Shining felt it like an apple-farmer’s kick to his heart. He didn’t even have to think about his reply, it had been as true now in this crazy situation as it ever had been. “I love you too, Twi.” “...So… w-what if… y-you…. Y’know…” Twilight mumbled. Shining looked down at her and arched an eyebrow in confusion. “If I….” “M-made… love… with me.” “Uhm…” Shining couldn’t help but flex himself, scraping his little sister’s insides with his girth, reminding her of the positions they were in. “Mmf! N-no… I mean… if you moved… and... “ She locked eyes with him and breathed out. “Finished in me.” Shining felt a flood of hot blood throb through his brain. It was exciting enough to hear his wife ask to have him fill her with baby batter… but to have his sister ask him! “T-twi!? W-we…” “I mean… y-you’re not gonna go soft anytime soon.” She quickly explained. “That’s for sure.” No chance of that happening while he was buried in mareflesh. “S-so… maybe if you finished… you’d go soft… and then we could get out….” She looked up at him, rosey cheeks burning brightly, eyes full of desire and hope, sparkling with dewy love. “Y-yeah…” It made no sense. None whatsoever. Even if he went soft - they would still be bound up with one another. There was no mistaking it - this was his sister asking him to fuck her. “A-are you sure you w-want me to...:?” Twilight nodded. “A-and y-you want to… also, right?” Shining looked down at her, filled with apprehension, tension, lust, desire… and love. Gods. Everything about this screamed taboo, screamed wrong… His mind played through the decades of time that he had grown up with Twilight. Always filled with love and friendship… but never - this. It was so wrong. And yet. Everything aside from his mind. His heart. His gut. His cock… OK, he tried to tune that last one down a little bit. Back to his heart: it was overflowing with love for his little sister. His Twily. Twilight. He couldn’t let her down. “Y-yeah. B-but wh-what about… foals…” Twilight bit her lip. “I… I don’t know. I’m not sure if I’m in estrus or not. But… “But…” “It… wouldn’t be the end of the world if I had your foal.” “Mm… y-you’d be a great mom.” “Y-you’re already a great dad.” They stared at each other, drunk on one another’s love for a full minute, enjoying the sensation of their bodies and their hearts. “Shiney…” “Twily…” “C-can y-you give me… a kiss?” He was already leaning down even as she began to request it. He kept his eyes open, not wanting to miss a second of the sight as their lips contacted. He watched his little sister’s tension melt out of her features, clenched shut eyes relaxing… and felt a ripple through her pussy as she moaned into his lips, her soft breath tickling his nose. It was lighting a fire in him. He slid his tongue against her lips, slipping into her muzzle and widening her mouth as he turned their kiss into a deeper, Prench kiss. Her soft moan became a throaty growl as he probed the back of her throat. And then he began to thrust. “MMmmmmf!” She groaned into his kiss as he started to slide massive, throbbing black stallionflesh into her slick pussy. His huge length was quickly running out of space - he was already buried deep, deep within his sister’s pussy… and she could only take a couple more inches before he was pressing against her cervix. As soon as his flare pressed against her final barrier Twilight broke away from their kiss and tossed her head backward. “O-oh f-fuck!” The bulge in her body was at her belly button. A sudden burst of ripples flooded through her tight little cunt, rapid, disorganized spasms of milking clenches as she humped back into his slow thrust… sending winking squirts shooting against his thighs from her third orgasm of the afternoon - he felt her tail swish and lash against his lower legs, her whole plot quivering and tightening, her ponut and dock tensing and relaxing with the waves of orgasm. He couldn’t take any more of this. He stumbled forward, jamming Twilight against the wall of the zeppelin’s cabin, finding purchase to start thrusting with more intensity - letting him stuff more of himself into his little sister’s needy cunt. “Oh… f-fuck…. Sh-shiney!” He was pumping in and out now, his grinding hips sliding a few inches of his gargantuan earth-pony-like cock in and out of Twilight’s body. Pump after pump, his fat, black cockhead battering against his little sister’s womb.  “Y-yes…. Yes!” His heavy black balls began to swing as his thrusting increased in speed and intensity, swinging and impacting with wet plaps against Twilight’s dock and soaked tailhole, drenched from a constant flow of hot, sticky marecum. “MMMMnnnngh! Oh Clestiat!” Twilight had tucked her head against his powerful chest, bringing her horn just into range of his mouth. Without even thinking, he let the purple horn into his mouth, nibbling at it the same way that Cadence loved when he did during their more passionate sessions. It was like a bomb went off in his mouth. “H-HOLY FUUUUUCKING F-FUCK!” Twilight screamed beneath him. The sparkling gunpowder taste in his mouth was a brief distraction, before the rippling and terrifyingly powerful fourth orgasm of his little sister’s spasming body overwhelmed him. She was humping and gyrating against him with violence, her wings flapping wildly out to their sides in a desperate attempt to get a little bit more leverage to impale herself on her brother’s fat, throbbing stud-cock. And the deeply ingrained biological instincts of stallion and broodmare were triggered in the siblings - hips slamming with more force, cock throbbing with more blood…. womb opening to be bred. Shining felt the last few inches of his cock slid into his little sister’s cunt suddenly, as he fucked his fat cockhead deep into her womb.  Twilight immediately wrenched her head backward, pulling her horn out of his mouth in a cascade of purple fireworks as she continue to cum all over her brother’s magically fattened cock as he jackhammered her into the wall/ “OH BUCK! SHINING! SHINING! SHINING!” Twilight moans  *PLAP PLAP PLAP* “BUCK! BUCK ME! YES! YES!” *PLAP PLAP PLAP* Their bodies were completely merged, a sweaty twisting mass of flesh and fur, the musky stink of their sweaty and engorged, dripping sexes surrounding them like a fog. Everything was pleasure and pain - an aching tension of burning muscles and potent hormones, driving him to pound harder… harder… harder! *PLAP PLAP PLAP*  “Twiiiii-aaaaaahhHH!” He screamed out, biting his tongue and clenching his jaw… powerful muscles straining and bulging as he felt his cockhead expand to it’s a full, massive, throbbing pre-orgasmic flare, his heavy balls shot up to his groin and he felt the agonic throes of his orgasm as it began… a thick pulse traveling through his groin like a broken spring. He was going to pop in Twily - there was no way to stop now. The little filly he’d given horsey-back rides to. That he’d cheered up when she was blue. That he’d pulled goofy pranks on. He was going to paint her insides white. Fill her with his fertile side. He was going to cum in his little sister. *PLAP PLAP PLAP*  “ShhineeeeEEeee….” Twilight groaned out, eyes rolling wildly, tongue hanging loosely from one  as she succumbed to the wild final thrusts of his final and desperate passion. His cock-slit exploded thick, boiling, fertile stallion-seed. A loud crack and POOF of smoke filled the entire room. … Unnoticed by the sibling pair in the throes of their passion, Twilight’s horn was sparking and shooting fireworks… which meant that the inhibiting horn ring had come off, unlatched accidentally by Shining mouth as he nibbled and teased his little sister’s horn. Normally, this would have simply resulted in some magical sparks of energy… But Twilight’s spell was all about utilizing the potential energy of alicorns… and by casting the swap she’d charged up the thaumic field… primed it like a rubber band, stretched too far. With the invoking of the field through her orgasmic casting, she had primed the spell to rebound, casting again and seeking out the nearest alicorn to swap with. Click here to roll a dice and see which ending you should click on. If you rolled a ONE. If you rolled a TWO. If you rolled a THREE. If you rolled a FOUR. If you rolled a FIVE. > You rolled a ONE > -------------------------------------------------------------------------- Ending ONE The cloud of magical fog cleared instantly. The spell had failed, with too much chaotic casting energy making the thaumic matrix backfire and collapse on itself. Shining barely noticed, it only registered as perhaps a more violent alicorn orgasm than the ones he was used to with Cadence… who sometimes started small fires accidentally when she popped off. He was too busy pumping his little sister full of cum. “OhhHhhhh y-yEesSsss….” Twilight groaned, staring lovingly up into her brother’s eyes as his cock pulsed in her. Great, steaming gouts of cum pumped into her fertile womb, splattering in with thick splotch after splotch. Shining fought to keep his eyes from crossing as he felt Twilight’s tight little cunt milk him, coaxing every drop of seed from his massive earth-pony-like balls.  A few final, weak hip thrusts accompanied his ejaculatory throes - he could feel his huge flare plugging the entrance to his little sister’s womb, the pressure inside her from being absolutely stuffed with his foal-batter making her belly grow beneath him. “T-Twiiii….. Unnnnnf!” He groaned out as the last spurt trickled from him and his legs buckled. “Ooph!” Twilight groaned as he fell ont top of her, his heavy, sweaty bulk falling on her like wet a hot, wet, sack of potatoes. “T-twi…” He groaned weakly, panting and gasping, doing his best to roll his weight off of her… but he was so tired… so spent… “Shhh…. Shh…” Twilight cooed, nuzzling the underside of his chin. “I love you. Shiney. You’re the best BBBFF ever.” Shining felt a wet, loving lick against the nape of his neck… he wanted to return it… but his eyelids were so heavy… so tired… so…. … Shining’s eyes groggily opened. He was tucked into the bed in the zeppelin, a glass of water next to him. He rolled over onto his other side, a warm grin spreading across his face when he saw his beautiful wife Cadence resting atop the sheets, smiling at him. “Morning sleepy-head…” Shining yawned, clearing his throat and starting to stretch away his fatigue. “Morning Cadie…” “You get a nice rest after all of your ‘exercise’ yesterday?” Shining blinked, trying to think back to what he and Cadence had done the previous day. Immediately images flashed in his mind of Twilight. His sister… taking his dick. Taking his passionate lust. Taking his load. “I… uh… I had the weirdest dream…” Shining scrunched his muzzle, trying to recover the correct memories from the previous day. “I… dreamed I was… having sex with Twilight.” he mouthed the words slowly, the concept feeling weird to say aloud, not that he felt awkward saying it to Cadence. He shared everything with her - she had no judgements of course… She always loved to hear about the weird trappings of his mind. She often used the information to devise some rather exotic fantasies of her own… he grinned as he readied himself for his wife to tease him about his little-sister complex gone awry. But cadence only Cadence arched an eyebrow at him. “Dream?” ‘Huh?’ Just then the door opened up and Twilight Sparkle herself trotted into their cabin, carrying a small platter of breakfast. Shining’s mouth dropped open as he saw the still slightly pudged-out, full belly of his little sister… and realised that yesterday had been no dream. “Good morning BBBFF, scooch over you two so I can get in bed too!” > You rolled a TWO > -------------------------------------------------------------------------- ENDING TWO The smoke cleared quickly, blown away by the magical force of a powerful teleport occurring. Shining felt the first, thick blast of cum spill out of his engorged cockslit, wincing and clenching… until he noticed the tiniest flash of pink in the corner of his squinting eyes. “Sh-shining!?” Cadence’s voice filled his ears. His eyes shot wide. Underneath him was a very surprised, very flummoxed, Princess of Love. Suddenly filled with his dick. His huge earth-pony-sized dick. His huge, earth-pony-sized, flared, cumming dick. “What the… .h-h-h-oly…. BUCK!” She squeaked, looking down at her gut, which was rapidly expanding. “C-cad… cadie…” Shining groaned, his tongue sticking out of the corner of his mouth. He could feel the different sensations of Cadence’s cunt, of her womb, of her body against him… his flare was plugging her small cervical opening as he unloaded steaming gouts of cum into his beautiful wife. “What. What!?” She blinked, mouth half-open in shock. “F-fuck baby… s-sorry, I can’t… st-top!” His hips quivered and spasmed, as he continued pumping, inflating his darling wife. “Shh… shh… it’s OK honey… that’s it… let it all out now…” Cadence calmly cooed, patting his back as he finished his final orgasmic-throes. “F-f-fuck…” He grunted, slipping to his knees and collapsing onto his side, still pumping his wife’s womb full of batter. “Banana bread.” Cadence whispered, causing all the bindings to suddenly pop-off of them, allowing her to reach up with her fore-hooves and stroke his face as the last, desperate trickles dribbled out of him. “C-cadie…” Shining gasped, a happy wave of relief rolling over him. He hadn’t ejaculated in his little sister, somehow, by the grace of Celestia. And yet… for some reason he felt… disappointed. “Good boy, Shining… Good Boy…” Cadence cooed, petting his head. “I think you gave me something meant for Twilight, didn’t you?” Shining blinked groggily, his mind too addled and tired to fully comprehend what his wife was saying as he slipped into a drowsy sleep. “That’s it… rest for now honey… you’ll need your strength for when you give Twilight what she missed out on this time…” Shining could only goofily grin as he slipped into sleep, his wife stroking his brow. > You rolled a THREE > -------------------------------------------------------------------------- ENDING THREE The smoke cleared quickly, blown away by the magical force of a powerful teleport occurring. Shining felt the first, thick blast of cum spill out of his engorged cockslit, wincing and clenching… until he noticed the tiniest flash of white in the corner of his squinting eyes. “Shining Armor!?” His eyes shot open. ‘Princess Celestia!?’ The larger, elder alicorn God-princess had suddenly taken the place of his little sister under him. He squeezed every muscle he had, bit down on his tongue hard enough to draw blood… anything to try to stop the boiling geyser from erupting out of his cock. “What is going… o-oh…. OH… OH!” Shining watched as Celestia’s eyes flashed from confused shock to a stunned realization. He was nutting in the God-Princess of Equestria’s holy womb. Hard. “F-fuck!” He squeaked, as the first steaming, boiling gout of cum splattered out from his engorged cockslit, painting Celestia’s uterus. He pulled back instinctively trying to dislodge himself from her body… but his massive flare was firmly wedged inside her cervix, plugging her womb as he sprayed thick rope after rope of his fertile stud-batter. Celestia looked up at him with an arched eyebrow of smug curiosity, as if observing him on the parade grounds. He tried and failed to refrain from making little, plaintive hip thrusts as he spurted spurt after spurt into his regent. Her arched eyebrow went higher, and a naughty grin the likes of which he’d never seen on her face broke across her muzzle. “Hmm… a surprise… but not an unwelcome one…” She purred. He felt an incredible, crushing strength of power assault his stallionhood from all sides - then a flaming heat which felt like it would sear the flesh of his cock off...  “I shall assist you in finishing… my little pony…” “Sh-shit!” He swore as he felt the rolling, crushing, power of the God-alicorn’s cunt as it squeezed his shaft like a tube of toothpaste, drawing every drop of his boiling ejaculations out of his obsidian hore-cock. “Good… good… Cadence is a lucky mare.” Celestia giggled, waggling her eyebrows as her royal belly began to fill and expand. “P-princess!” Shining stammered as he fell to his knees, laying Celestia onto the zeppelin cabin floor. The last desperate trickle sliding from his flare. “Come now, my little pony… give me all of it.” Celestia purred. A golden glow ignited off of her horn, reaching out and encapsulating his thick black balls with a warm field… which quickly became a burning flame. “Nggh… ngh… NGHHHH!” Shining squeaked out as suddenly he felt his balls shrinking, contracting… as new, thicker, spurts of heavy seed shot through his rigid cock into Celestia’s womb… like a thick milkshake forced through a too-small straw. “G-g-god!” Shining groaned, as his body deflated impossibly, the size and bulge of his muscles from the potion shrinking away, drawn out in boiling geysers of impossible ejaculations. “Yes?” Celestia chuckled, cooing as she stared deeply into his eyes, while her divine marehood drained him completely. “Nnghh… puh-please…” He gasped, as his eyes rolled back in his head. Celestia chuckled, then snapped off her glow. “Of course, my little pony… I am merciful.” Shining heard a snap of power, as Celestia teleported off of him and out of their bindings, standing above him with bemusement as he lay gasping on the floor. *POP* *Splorch… splorch… splorch…* With nothing to plug her pink princess pussy, thick gobs of Shining’s ejaculate waterfalled in steaming torrents from Celestia’s pussy. “You did very well, my little pony.” Celestia grinned, looking down at her swollen belly. “Worthy of addition to my royal harem, even… if my niece allowed it.” “Y-your… h-highness… I’m… s-sorry…” Shining panted unable to move. “Whatever for?” Celestia smiled warmly. “I was flying nearby looking for the zeppelin after Cadence informed me of the Twilight’s swap spell… the rebound must have captured me as the nearest alicorn… your… gift… was not unappreciated.” “P-princess-” “Shh… rest now, Shining Armor… I will see to everything, consider it a token of my thanks.” Shining felt the Princess’s warm magical glow lift him toward the bed as he began to happily slip into sleep. > You rolled a FOUR > -------------------------------------------------------------------------- ENDING FOUR The smoke cleared quickly, blown away by the magical force of a powerful teleport occurring. Shining felt the first, thick blast of cum spill out of his engorged cockslit, wincing and clenching… until he noticed the tiniest flash of dark blue in the corner of his squinting eyes. “Prince Shining Armor!?” His eyes shot open. ‘Princess Luna!?’ The dark blue princess of the night had suddenly taken the place of his little sister under him! He squeezed every muscle he had, bit down on his tongue hard enough to draw blood… anything to try to stop the boiling geyser from erupting out of his cock. “What art thou… oh… OH!” Shining watched as Luna’s dark blue eyes flashed from confused shock to a sudden and stunned realization. But it was too late. He was nutting in the Princess of dream’s mystical womb. Hard. “F-fuck!” He squeaked, as the first steaming, boiling gout of cum splattered out from his engorged cockslit, painting Luna’s uterus. He pulled back instinctively trying to dislodge himself from her body… but his massive flare was firmly wedged inside her cervix, plugging her womb as he sprayed thick rope after rope of his fertile stud-batter. “P-prince Armor! Cease… cease immediately!” Luna’s eyes were wide with alarm. “I am in rut!” “S-s-sorry!” Shining grunted. His aching cock pulsing and splattering rope after rope of fertile side into the beautiful night-mare underneath him. “N-nay!” Luna grunted. “I mustn’t allow my body to be stained with the male essence! You don’t understand!” Shining felt a powerful ripple of muscles around his cock, a vise-like tightness as Luna’s expert cunt-muscles clamped down on him just under his medial ring, growing tighter and tighter and tighter… until his pulsing ejaculation were cut off, plugged by the constricting vise-pussy of legend. “O-oh… f-fuck!” Shining groaned out, as he felt pulse after pulse building up in his cock-shaft, like a balloon about to burst… a dam about to break behind a flood of virile stud-seed. “I… I am so sorry Shining Armor… but when I have a taste of stallion…” Luna looked into his eyes with concern and pity. “I… lose myself…” “P-p-uh...please…” Shining groaned. “I’m… gonna… pop!” Luna’s eyes dimmed slightly. “I… I already have some of you in me… I… I might as well… I… mustn’t….” A naughty, toothy grin sparkled across her mouth. “But I am  the princess of the night…” Shining felt the vise release. A huge, fire-hose like blast of cum flooded out of him, splashing into Luna’s womb like a bucket of water poured into a drinking glass. “L-l-luna!” He groaned out, his hips pumping in agony. “It has been so long since I’ve indulged in a good, hard, rut.” Luna growled from the back of her throat. Shining felt an incredible, slick, wetness engulfing his shaft. It was nothing like Twilight’s chaotic spray, or his wife’s well-practiced pussy… this was… Godly. “My marehood has ended wars you know..” Luna giggled, her eyes flaring with excitement as she licked her lips. Shining groaned out… the whole set of her powerful marehood muscles were sliding up and down him in unison… stroking him as though he were thrusting into her like her whole internal body was a fleshlight she could control with her clenching cunt-muscles...  “G-god!” “My sister can’t help you now, Prince,” Luna growled. Shining felt himself fall to the ground as he continued to splurt out shot after shot into the night-princess’s uterus, her belly already filling and bulging against him. Then her stroking cunt began to vortex around him, twisting and clenching as she continued to stroke him with nothing more than her body’s expert talent. “F-f-fuck!” Shining grunted out, the last trick of his ejaculation dripping into Luna’s stuffed belly, while she continued to clench and swirl her cunt around his aching stallionhood. Shining felt his eyes begin to roll back… the overwhelming pleasure of the excited Luna driving him unconscious. The growling, husky voice of Luna chuckled as he begin to drift off. “Oh you foolish little colt… sleep won’t save you from me… I will see you in your dreams, my handsome prince… where we can take as much time as I wish.” Shining slipped into unconsciousness. > You rolled a FIVE > -------------------------------------------------------------------------- ENDING FIVE The smoke cleared quickly, blown away by the magical force of a powerful teleport occurring. Shining felt the first, thick blast of cum spill out of his engorged cockslit, wincing and clenching… until he noticed the tiniest flash of white in the corner of his squinting eyes. “D-dad!? His eyes shot open. ‘Flurry!?’ His eighteen-year-old daughter was under him. Her mouth open in shock, revealing her cute little braces, the ones that she was still so self-conscious about… even though she’d grown up to be such a beautiful young mare. “Wh-what… I… oh… oh d-dad...is going…” Shining watched as Flurry’s eyes flashed from confused shock to a stunned realization. Shining was about to nut inside his daughter’s virgin womb. Hard. “F-fuck!” He squeaked, as the first steaming, boiling gout of cum splattered out from his engorged cockslit, painting Flurry’s tiny teen uterus. He immediately pulled back instinctively trying to dislodge himself from her body… but his massive flare was firmly wedged inside her cervix, plugging her teen-filly womb as he sprayed thick rope after rope of his fertile stud-batter into her ripe womb. “D-d-dad!?” Flurry squeaked, her wings shooting out instantly in surprise and arousal. Shining could feel the impossible tightness of her fillyhood, a tight tunnel that spasmed and coiled around him, a chaotic mess of nerves and muscles as she struggled to suddenly stretch around his enormous size. With her far smaller size, the teen was only impaled partway down his throbbing, rigid horsecock… the medial ring still outside of her straining, stretched pink-pony-pussy lips. And yet she was still obscenely stuffed with her dad’s cock. “D-dad… oh… oh… daddy!” She mewled. But there was nothing he could do… blast after blast of hot, splattering cum gushed from his engorged cockslit, stuffing his daughter with his seed, her belly quickly expanding outwards, pressing against her father’s muscular abdomen as the far larger stallion’s cream expanded inside her. “H-holy sh-shit d-dad… m-my p-pussy!” She groaned her teeth clenching as she struggled to cope with the flood of sensations and chemicals assaulted her synapses. “B-baby…” Shining groaned, his eyes rolling in his head. “S-sorry b-baby…” “D-dad…” His hips jerked and slid back and forth softly, sliding a half-inch of his thick black horsecock in and out of his teenage daughter’s cunt. He could feel how tight her filly-puss was, could feel the small tapping boop of her small clit, could sense the drip of her teen-slickness as her arousal began to build and drip out of her. Things that no father should ever feel. “D...daaahd…. dad…  daddy…” Flurry’s confused gasps were coming slower now… more slurred… as her mare-instincts took over, reacting to the feel of a potent stud breeding her by flooding her with as much oxycodin and dopamine as possible. Shining watched with aroused horror as his teenage little-girl’s eyes drooped slowly into a mellow bliss, widening slightly with each pulsing throb of his cock as he spilled his rich batter into her… until she finally groaned out, tongue slipping from her mouth and eyes rolling backward. Shining felt his own legs buckling, slipping, and he just barely managed to twist as he fell to the ground, so that he wouldn’t land on his daughter as he fell… she looked so full that he briefly worried she’d pop… it was like she was six months into a pregnancy! “F-flurry… Flurry… wh-what… what have I done…?” He groaned as he felt the last squirt pulse into his daughter’s fertile womb. But he didn’t have long to think about the consequences, as a wave of fatigue began to overtake him. The last thing he heard as he slipped into unconsciousness was the crack of a teleport and the sound of his wife’s voice. “Oh buck.”