A Womb's Filling Eve

by Dashfriend

First published

The Shy family celebrates Hearth's Warming, but not quite the way Fluttershy imagined it.

Fluttershy and Zephyr Breeze are visiting their parents for the Hearth's Warming holiday. But as the celebrations heat up, Fluttershy realizes her family has a very different idea of what a family reunion should look like.

Will she be able to fend off her horny brother, her foal-crazed mother and her well-endowed father? Not really.

Written for the Wincest Groups's No Shame November contest.
Thanks for giving me the motivation to finish at least a single story.

Doesn't contain (in case you want to avoid spoilers):
death, vore, gore, scat, actual violence, humans, anthro, EQG, OCs, normal and healthy relationships

Contains:
straight, gay and lesbian couples; vaginal, oral and anal penetration; incest, incest and only incest; impregnation; lactation; watersports; group sex; rimming; dubious consent; anatomically correct descriptions (or an attempt thereof)

A Secret Gift

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"Ah buck, how are you still so tight?"

"Shhh, quiet Zeph! Mom and Dad are right next door."

"Don't worry sis, they won't hear us, your creaking bed is far louder than me."

"Groan."

Fluttershy instinctively tried to facehoof herself for the umpteenth time this weekend. She could however not quite reach around her brother's head as he affectionately nuzzled her neck and chin. Zephyr was busy on her other end as well, steadily pounding her plot deeper into the mattress.

Normally such lewd acts were completely out of the question for the young pegasus. She had made it clear to her every horny brother years ago that if he wanted to bury his admittedly impressive cock in another pony he would need to find a marefriend for himself. At most she would blow him to get rid of a particularly persistent case of morning wood, or maybe give him the occasional wingjob before bedtime, but that was it!

Unfortunately this was no ordinary occasion, as they had both been invited home to their parent's annual Hearth's Warming Eve celebration. And in an unfortunate moment of cider-fueled horniness the evening before the holiday Fluttershy had decided to give her brother a special gift for the occasion.

Now there she lay, on her old bed in her old room, buried beneath Zephyr's heaving body, trying her hardest to keep her pussy from twitching every time her brother's medial ring slipped inside. In an attempt to distract herself she recalled the previous evening, what events led her here, pinned down under an all-too familiar pegasus.

Once he had discovered what his sister's mysterious present actually was, he had been quick to drag her into her bedroom and in his favorite position. Her ass right at the edge of the mattress, his hind hooves were now clattering on the wooden floor as he drove himself over and over inside her. While he was belly to belly with his mate and in the ideal position for a deep fucking, Fluttershy could only hold on to his sides, her legs rising up helplessly as she lay on her spread wings.

After her hushing the room lay in relative silence again, at least if one ignored the creaking springs and groaning frame below her, the clicking of excited horseshoes on a hardwood floor, the labored breathing from above, the slapping of heavy balls against a wet pussy and the occasional soft moans that definitely didn't come from her. Now that she thought about it, she was more than relieved that her parents also had their fair share of festive beverages that night.

For all his quirks and flaws Fluttershy could understand less and less why her brother was still single. Not only was he impressively endowed but his stamina could have led anypony to believe that he had far more experience than just with his sister's socks. His technique didn't lack far behind either. He hadn't wasted any time on foreplay, rearing up right away and resting his hooves on both sides of a by now clearly regretful Fluttershy. More than ready, his horsecock had already slipped out of its sheath, growing to its final size while eagerly slapping against his belly. He hadn't slipped it in right away, taking this rare opportunity for a quick teatfuck between her petite crotchboobs. Humping back and forth his length and her fur quickly moistened with clear precum.

"Sorry Flutterbutt, your rump is amazing, but we'll have to work on your milkers."

"Oh, and how will we do that?"

"Leave that to me."

Before she could inquire further, he pulled back, aiming down and placing his unflared tip right against her entrance. Only now did Fluttershy realize that she was actually quite clenched down there. Maybe because she was about to be rutted for the first time or maybe because it was her own brother who was about to take her virginity, but suddenly the alcoholic confidence boost was replace by a familiar shyness. She tried to relax, taking a deep breath to lose the tightness that had gripped her body, but her marehood remained firmly closed.

Panic started to well up inside her. Here she was, presenting her drunk and horny body to a stallion and now she bucked it all up.

Her rescue came sudden and totally unexpected. Her eyes focused on the pony right above her, were a momentarily forgotten Zephyr was now looking directly at her, gazing deeply into her eyes. His hoof against her face, a soft frog gently caressed her cheek.

"Hey sis."

"Wuhh?"

Before her mind could catch up he moved down, planting his mouth across hers. Her eyes flew wide open at the sudden display of intimacy, her body reacting on its own. Her mouth opened, welcoming his tongue as it went exploring, playfully wrestling with her own as their breaths started to mix. His saliva tasted somewhat familiar, and not at all like the times he had nutted inside her mouth. It was more calming, more relaxing.

And relax she did, as her marehood finally twitched. Her own juices started to flow as her muscles folded outwards, exposing her clitoris to the outside world.

The dick right below used that opportunity. The tip had continuously kept up the pressure and now that the resistance faltered it went forward. Zephyr's dick parted his sister's folds as he sunk right in, their natural lubricants mixing together as he pushed deeper and deeper. Her clit winked furiously against the thick cock rushing past, and the feeling momentarily took Fluttershy's breath. Her brother broke the kiss, admiring the stunned look on her face as he paused his advance.

"Didn't think I'd be this big, huh?"

"Just shut up and buck me."

"No problem sis."

With that he pulled back, almost popping out of her before reversing course and slamming back in, his thrust only stopped by his medial ring hitting her pussy lips. Burying his muzzle in her lush mane, he repeated this motion, settling into a steady pace as he pounded her over and over again. Fluttershy rested her head back on the mattress, looking past the aquamarine pony on top of her, studying the ceiling while trying not to enjoy their incestuous rutting too much. She had to admit, being firmly sandwiched between her soft bedding and a warm body above felt kind of nice, safely locked in place as she was free to enjoy the ride.

A loud grunt snapped her out of her thoughts. Zephyr dug his hooves into the ground as he pushed forward again. With an audible pop his ring finally made it inside, stretching Fluttershy's vulva wider than ever before. The sudden stimulation was too much for her. Before she could react, her pussy tightened, and a spurt of marecum dampened Zephyr's crotch. Only the huge wave of fresh pheromones hitting his nostrils prevented him from making any snarky comments. Instead he took his sister's physical reaction as a sign of encouragement and adjusted his technique, letting his ring pop in and out with each deep thrust.

Slowly his cock worked itself towards his little sister's womb, every move forward stretching her walls just a bit further. Her pussy was like a vice, clenching down around him, almost like she wanted to hold him in every time he pulled back.

"Ah buck, how are you still so tight?"

Back in the present Fluttershy now had to face an unpleasant reality. The fat horsecock inside her would make her cum.
Hard.

And judging by the tingling feeling in her nether regions that would be pretty soon. Somehow she needed to convince Zeph to switch holes. Finishing him off with her mouth was no problem. Even her ponut would be fine now. Anything to avoid creaming herself on her brother's cock. He would never let her live that one down.

"H-hey Zeph, mind switching position for a bit? I could do that thing with my tongue you like so much."

"Nu-uh, I like your present just like that."

Buck.

Alright, she just needed a new plan. Simply let him have his fun a little longer. Then let him cum on her teats or wings or wherever, get a quick shower and this bad idea would finally be over. That simply quickly turned to not so simple at all as Zeph's shaft used that precise moment to make contact with her cervix.

Fluttershy drew in a sharp breath. His broad tip kissed the beginning of her womb once, twice, three times, demanding entrance to his final goal. The feeling was unlike anything she had ever experienced before. No clopping hoof or soft wingtip could ever recreate the burning sensation raging deep inside her right now. She was approaching her limit fast, and her options were limited.

Desperately she tried to focus on anything else, the soft fur rubbing against her entire body, the spicy musk in her nostrils, the gentle nibbling on her right ear. Not very helpful. With all her remaining strength she half muttered, half moaned her final warning.

"Zeph, I-, ah, pull out. Don't cum insiii-"

And with that thought in mind she went over the edge. A searing heat shot down her spine, lighting her privates on fire. Her pussy convulsed, milking the cock inside for all it was worth, desperate to quell the burning feeling deep down. Her cervix obediently gave in to the assault, opening up and allowing the eagerly waiting dick inside.

Zephyr was finally able to bottom out, sinking himself fully into his sister's quivering pony pussy. His balls lewdly slapped against her ponut, filled to the brim with his virile seed. Further inside his tip flared up, tightly sealing the entrance it had just went through, trapping itself in his sister's fertile womb.

Fluttershy was in a world of bliss. Her entire body tingled and shivered as sweat ran down her face, mixing with her lover's as she nuzzled him unconsciously. Riding out her first ever proper orgasm she ground her pussy against his base, eager to get as much pleasure as possible. Her vagina was hard at work as well, squirting out wave after wave of hot marecum, drenching his balls, crotch, tail and everything else around them.

As her high finally waned, a warm sensation spread inside her depths, making her feel content like never before as she basked in her afterglow. It spread and spread, slowly expanding her belly-
Wait a second.

"Zeph!"

"Yeah, Sis?"

"I told you to pull out!"

"I will, just a mommh-"

His cock pulsed again, another thick load traveling down his length, spraying from his tip and mixing with the sea of foal batter already inside. Her vagina was not helping either, muscles still rippling as they milked his member completely dry. Zephyr made a few more short thrusts, making sure every last drop was safely inside his mate before Fluttershy finally found enough grip on his sweaty sides to push him back.

With a loud pop his flare came loose, his flaccid penis quickly exiting her now widened vagina. Fluttershy rapidly sat up. Desperately pawing and squeezing at her privates she realized in horror that there was nothing she could do against the cum inside her, not even a single drop dripping back out. Her own womb had sealed itself quickly, and with it her brother's creampie and her own fate.

"Oh buck oh buck oh buck. Zeph, what in Celestia's name have you done?"

"Heh, sorry, got a little carried away there."

"Think, Fluttershy, think. There is still time. That's it. Zeph, come here!"

"Umph-"

Her brother was suddenly greeted by a sloppy horsepussy to the face as Fluttershy had a hoof on the back of his head,
forcing him to sit down in front of her and pressing his muzzle into her crotch.

"Use your stupid mouth for something useful for once and suck your cum back out. If you're quick we might still be safe."

Zephyr didn't need to be told twice. Eager for his second gift that night he place his lips against her lower ones, suckling and licking her wet love channel. Truth be told, he didn't see how this would solve anything, but if his sister told him to eat her cunt, so be it. Savoring her taste he twirled his tongue inside her snatch, smirking as her nervous ramblings from above were interrupted by little eeps.

The flavor on his taste buds was familiar, but more in a eating-your-own-sis-out fashion, not in a tasting-your-own-nut one. A sudden flash of bright light made them freeze in place. Looking at Shy's belly, they both saw an intense spot of white shining from between her belly button on right teat. As fast as it had appeared it was gone again, and in it's place sat a perfect replica of his own cutie mark, proudly announcing the father of the newly sired foal to every onlooker.

A moment they both gazed silently at the majestic sight. Then their eyes met. Fluttershy's look wasn't even all that angry, just very very annoyed. Sitting on her bed, looking slightly disheveled, she waited for any reply or suggestion, as little as it could do now.

His dick sprung back to life, growing from between his legs and plopping onto the floor.

"Well, now I'm horny again."

A Special Celebration

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"Come on, just tell them."

"Are you out of your mind? They would be furious!"

"Why would they? Mom is crazy for some grandfoals. And dad will be happy I finally got a marefriend."

"Stop saying that, I am not your marefriend."

"Whatever, sweetheart. What's your plan then?"

"I don't know, just get this weekend over with and write letters until next Hearth's Warming. It only takes 11 months so it'll work out."

"Uh huh. And you'll just hide your belly the whole day."

"Well, it would be easier if it was on one side, but somepony just had to go and knock me up a second time."

"I told you I was sorry. But that asymmetrical paternity mark was driving me crazy."

"Sure it was."

"I could give you a third one in the middle if you'd like, make it a triangle."

"Oh, hush. Now remember to walk right in front of me, and distract them with something so they don't have time to look!"

Fluttershy took a deep breath before rounding the corner, closely following behind her brother who was already trotting inside the living room. Their parents were busy at the breakfast table, her mother arranging the festive plates while her husband was pouring coffee for everypony. Posey Shy spotted them first, turning towards her son.

"Good morning fillies! Slept well last night?"

"Morning mom, like a little foal."

"That's, great. And you Fluttershy, enjoying your old bed?"

The icy stare Shy had focused on the back of her brother's head a moment earlier was immediately replaced by a rising blush.

"Uhm, yeah, thanks."

Quickly averting her gaze she started towards the nearest seat, careful to keep her stomach low.
Her brother had already taken a seat, idly chatting with Gentle Breeze, at least keeping him occupied for the moment.

Posey turned around, ready to head into the kitchen. Before she could start off her daughter's plot passed her. Immediately her nostrils flared and her head snapped back. Fluttershy froze in place as her mother's snout sniffed the air around her. The two stallions at the table looked curiously as the seasoned mare followed the invisible trail hanging in the air, her nose guiding her to the source of the unmistakable smell. Her daughter could only stare in horror as she came closer and closer to her backside, her tail desperately clamping down to preserve her secret.

Completely mesmerized Posey booped her nose against her daughter's rump, the loud eep from Shy rousing her from her thoughts. With wide eyes she looked at her little filly.

"Fluttershy, dear, is there something you want to tell us?"

"I-i don't know what you mean."

Posey continued to look at her while a worried Gentle walked up to her other side. Now trapped Fluttershy threw Zephyr a desperate glance. Her brother helpfully shrugged and sipped from his coffee. Turning back, she looked at her mother again.

"Listen darling, I have been a mother for quite a while, and older mares tend to have some expectations about their foals starting their own families. I could smell an expecting filly from Canterlot to here."

"Well, uh, it's not that simple."

"Don't worry, it'll all be fine."

Softly Posey reached forward, putting a hoof against her daughter's wither and pushing her back.

Fluttershy gave up her resistance, plopping down right were she stood. Her parents looked on silently as their daughter's belly was now at full display. Right below her belly button they saw two new markings, their son's cutie marks shining proudly from the yellow background.

This could not have gone any worse. Fluttershy was pretty sure of that. Motionless she sat on the ground, her traitorous body announcing her incestuous shenanigans to the world. Posey and Gentle continued to stare at her with disbelief, their mouths hanging wide open. Zephyr turned the page in his newspaper.

"Mom, Dad, listen, I know-"

"TWO? Two grandfoals at once? Oh darling, you make mommy so proud."

The next moment Fluttershy was caught in a spine-breaking hug, her mother barely containing her excitement.

"Finally, I was starting to get worried you might never find your special somepony!"

"MOM! He's not-"

"What a fantastic gift for Hearth's Warming. I can't wait to start the preparations."

"Preparations? What are you talking about?"

"Oh, you know. What color to paint the nursery, what cribs to buy, which wedding location to book, things like that."

"W-wedding?"

"We have to be quick if we want a date before you are due. That purple friend of yours has connections to Canterlot, right? Maybe she could get use a nice chapel on short notice. And we'll need a special dress for you. Does that tailor in Ponyville sell maternity fashion?"

"Mom!"

While his wife continued gushing on about weddings and pregnancy books Gentle turned to Zephyr.

"Good job, son. Your mother is crazy for some offspring, I'm glad somepony finally bred her."

"Dad!"

"Sure thing. Would have been a damned shame if nopony put a bun in her oven. Or two."

"Zeph!"

Fluttershy was beyond mortified. What should have been a nice and normal holiday celebration had quickly spiraled completely out of control. Here she sat in the middle of her parents' living room, pregnant with her brother's foals, her mother cooing and caressing her not yet showing foal bump, her father joking which mare in the family was the better lay. Everything that could go wrong had gone wrong.

As if she read her mind, Posey let off her midsection and cantered over to Zephyr. Rising up she gave her son a similar bear hug, nuzzling his cheeks as if he was her little colt again.

"I'm so proud of you, Zeph. Just going out there, finding yourself a marefriend and giving your mother her grandfoals. And you didn't even leave the house for it."

She whispered into his ear.

"Thank mom. It sure was some hard work but in the end she came around. Twice."

Still not breaking the hug Posey looked down, their touching chests concealing the view on the warm length poking her in the belly.

"Mmmh, I can feel the hard work alright."

Zeph grinned sheepishly, his member coaxed from his sheath by all the talk of fertile mares.

"Heh, sorry for that."

"Don't be sorry. You did very well last night. But-"

"But what?"

"Oh, it's just, I know I sound ungrateful, but I was expecting grandfoals from two separate couples. And now that you chose your sister as a mate, there's only half as many as I was hoping for."

"I wasn't thinking about that. How many did you hope for?"

"You know, no particular number. Just a herd of them."

"Well, I would hate to disappoint you. Should I breed her a third time?"

"Thank you Zeph, you are such a considerate son. But I have a better idea."

"Is that so?"

"I know your dear mother is not exactly a young filly anymore, but I do still have some productive years left in me."

"Go on."

"How does siring some half-siblings, half-foals sound to you."

"Intriguing. But what about dad?"

"Don't worry about him. Gentle, dear?"

"Yes, honey?"

"Would you mind bucking some more grandfoals in Fluttershy while I ride our son dry?"

"Not at all, that's a great idea."

"Wait, what? Do I get to have any say in that? Dad, wha-"

Fluttershy had stared dumbfounded as her mother slowly started grinding her body against Zeph's. It wasn't hard to guess what exactly her soft belly fur was brushing against, and their excited whispers seemed similarly inappropriate. She was so distracted that she complied instinctively when Gentle Breeze bit down, holding her carefully but firm by her right ear and pulling her back up. Stepping over his daughter, her slender body fit perfectly under his as he let go, instead placing a hoof at the back of her head, pushing down. Fluttershy barely had time to comprehend the situation as she now found herself on the floor, face down and ass wide up.

She turned her head sideways to look at her mother and brother, desperately seeking somepony to make sense of the situation. Zephyr had also moved his chair, now facing her directly to have a front-row seat for what was about to happen. He had to look over Posey's shoulder though, as she had climbed onto the chair with him, grinding her hips on his lap.

"Zeph, what the Tartarus is going on."

"Sorry Butterhush, mom just wants to have some more guests next year. So we decided to make them ourselves. Mom, you ready?"

"More than ready."

"Then hop on."

Fluttershy could only stare in horror as Posey's wings spread, giving her some additional lift as he rose up from Zephyr's lap. His erection sprung free, standing completely upright underneath her. Zeph used one hoof to steady his cock, aiming it at the right hole. With his other he reached up, gently getting a hold of the hovering pegasus, guiding her down. His tip made contact with her marehood, but instead of careful adjusting, his mother decided to showcase her experience.

She folded her wings and relaxed her hind legs, gravity instantly doing its job. Her son moaned loudly as she slid down his entire length, not even slowing down slightly as his ring briefly stretched her entrance before disappearing inside.
With a lewd twack she landed on his lap again, now fully impaled on his member. After quickly feeling around to the new intruder Posey started moving sideways, grinding her hips against Zephyr's in a circular motion.

Gentle Breeze had stopped his preparations for a moment, enjoying the show his family put up for him at the breakfast table. Turning his attention back to the mare below him, he leaned his head down next to her ear.

"See that, dear? No way your mother could take him in one go if she didn't ride the fattest cock in Cloudsdale every night. You'll take his dick like a champ once I'm finished stretching you out."

Not even waiting for an answer he kicked her hind legs apart, her body sinking even lower and into the perfect breeding position. His dick was already hard as a rock, eagerly dripping on his daughter's spine. Quickly he pulled back, angling it down and pushing it against Fluttershy's entrance. Front hooves placed directly before hers he applied pressure, holding her in place as he quickly parted her swollen lips and sunk himself inside. With a few short thrusts he worked himself to a safe depth before stopping for a moment, now completely embracing his daughter inside and out.

Posey looked back over her shoulder, happy to see her husband already hard at work.

"How does she feel, honey?"

"Tight and docile, just like I imagined. It's a shame I didn't get to break her in."

"Sorry dad, took a lot of persuading to even get her here though."

"True, but I'm calling dibs on my first grandfilly. About time I get to pop a cherry again."

"Sure, if you help me double dick mom up her pussy later."

"Deal."

"Zephyr Breeze, you better make sure you can handle your mother alone before you start planning a threesome. Now hold on to your chair, because this will be the ride of your life."

Zephyr locked eyes with her, showing his signature smug grin. A loud smack made Posey eep just like her daughter as his hoof connected with her flank, her plot rippling from the slap as a bright red spank mark started to appear.

"Giddyup then."

"Oh no, you didn't!"

Furious, Posey tensed up her hind legs, lifting her bottom of his crotch, strings of marecum connecting their privates together. More and more of the light green cock slipped out of her tunnel until she could feel his head stretching her entrance from inside. Instantly she reversed course, slamming down with full force, completely driving the air out of Zephyr's lungs as she impacted on his groin with a wet squelch. Giving him no time to recover she repeated her assault, bouncing in his lap over and over again at a literally breathtaking speed.

His wife now occupied, Gentle Breeze turned his attention back to his daughter. Going at a more gentle pace, he carefully whipped back and forth with his legs, his member sinking deeper inside of her at a slow but steady rate. Nuzzling her behind the ear, he whispered down to his filly.

"How are you feeling, Shy?"

"Ah- daddy, sooo full."

"Don't worry, it's almost half-way inside."

"Dad, we mmmh, we shouldn't be doing this."

"Doing what?"

"This, h-having sex."

"Oh?"

Gentle increased the pace, each thrust now rocking his daughter between his stable hooves.

"We are relahh- related, it's wrong."

"You didn't seem to have a problem when Zephyr knocked you up."

"It was an accident, I told him to pull out."

"So you just hopped on the first dick you saw while you were in heat? I didn't know I raised such a whorse for a daughter."

Making a few harder thrusts and flexing his muscles, his medial ring finally made it in, stretching Fluttershy more than ever.

"Nnng, there we go. I raised and reared you for so many years and this is how you thank me, by bucking your own brother behind my back?"

"I am sorry, daddy."

"I know, but don't worry, we can still make a fine and proper mare out of you."

"H-how?"

Gentle leaned on his daughter, one hoof sneaking under her, gently rubbing her belly.

"Simple, I will cum inside you. I will hold you steady and empty my balls deep inside your fertile womb. And then, when I'm done, I'll do it again, and again and again. And once he's done with your mother Zephyr will mount you too, we'll fill you from both sides, a nice family spitroast."

"You will do that?"

"Of course. We will inflate your tummy, give you a nice round and pregnant belly."

"But ponies will know-"

"Know what, that you are a dirty little filly, spreading your legs for your own kin? Oh, they will know once they see you, they'll think you have cutie pox with all our paternity marks on you."

His hoof now pressed down, circling her belly button to the beat of his thrusting hips.

"With a tummy this round you won't even be able to walk properly. How does that sound, your belly dragging on the floor, filled with our incestuous foals?"

A sound from behind answered the question, Fluttershy's furiously winking clit releasing a gush of marecum, splattering his balls and splashing on the floor.

"You're making quite a mess dear. Somepony will have to lick that up later."

Over at the table things were equally heating up. Posey was giving her legs some rest, content with having her son lift her up his tapered shaft before dropping her back down, his hooves digging deep into her supple flanks. Zephyr's mind was racing like crazy, demanding he mark this beautiful mare in his lap as his at once. His balls were full again, filled to the brim with his virile seed, only waiting to claim another womb. Thankfully his mate wasn't far behind, her face flushed a deep red, biting her lips in an adorable way. Mustering all his strength he lifted her again.

"Buck, mom, I'm close."

His mother slid back down, their hips connecting.

"So am I sweetheart."

Up she went again, the strain clearly visible on Zephyr's pained expression.

"Uff, ready for your next offspring?"

Once more he bottomed out, the mare's womb already wide open, welcoming the tip kissing its back wall with every thrust.

"As ready as I'll ever be."

"Alright, here it comes."

With all his remaining strength he lifted her high up in the air, his lubed-up cock bending slightly as it slid out. Posey braced on her son's shoulders, helping him prepare for his final assault. She could feel him withdrawing from her love canal before stopping at the apex of his thrust one final time, ready to claim her.

"Do it Zeph, make me a mommy again!"

He didn't need to be told twice, letting her slide down his entire length one last time. The two connected with a thunderous slap, her exposed and swollen clit rubbing hard against his groin. Zephyr took hold of her, his legs embracing her under her shoulders, holding her close to his chest. His wings closed around them, embracing her in a powerful winghug. Their lips found each other, their tongues finally meeting as the world around her became filled by a familiar shade of green, all her senses assaulted by her son's body and scent. Posey screamed her orgasm into Zephyr's kiss, her vagina contracting and pumping, her experienced muscles milking the length inside.

Zephyr was filled with an unimaginable sense of relief as his balls raced upwards, contracting hard as his dick pumped their content into his mom. He could feel the first load traveling down his shaft, blasting from his flared tip and painting her insides white. Now adjusted, his second spurt was even larger, his thick semen mixing with the first wave as he filled her up. The third shot was equally large in volume, bringing her capacity to its limit.

Posey's mind erupted with joy as her son unloaded a fourth time inside her, her belly now slowly bulging outwards and rubbing against his. His fifth cumshot finally proved to much and their tight seal inside her gave way. A thick mixture of his cum and her maregasm sprayed from where their hips were connected, shooting from between his spread legs, drenching their intertwined tails as the rest splattered onto the floor below. Slowly the puddle spread to the middle of the living room, joining the one his sister had made just minutes earlier.

Slowly Posey's orgasm died down, her mind still foggy from her hard release. She open her eyes to find herself muzzle to muzzle with Zeph, the two of them unconsciously sharing their familiar breath. His member was still hard inside her, determined not to let any more of his foal batter escape back out. Over their labored breathing she could her their love juices dripping from their seat.

As Zephyr looked back at her with a lovestruck gaze she leaned back slightly, their sweaty fur sticking together at first. Both looked down expectantly at her tummy, now rounded with the huge load sloshing around inside, giving the impression she was already carrying young. Below her swollen midsection her impressive crotchboobs still clung to his body, her hard nipples playfully squeezing into him. And right in between she found the most beautiful sight she had ever witnessed. Her sons paternity mark sat boldly in the center, glowing and huge in size, announcing a very successful impregnation to the world.

Zephyr gently drew a hoof over his mark, caressing his new foal with soft strokes. Posey joined him as her other hoof cupped his cheek, bringing her sire back in for another kiss.

After a few more minutes of basking in each other's afterglow Posey broke their intimate cuddling. Carefully she lifted herself up before turning around on his cock, not yet ready to break their connection in case his swimmers decided to go for twins. Resting her back against his she rubbed their fur together, now in the perfect position to watch the second stallion in the room blow, as Zephyr coyly fondled her teats, trying to see if they were already lactating.

Right in front of them Fluttershy was getting the rutting of her lifetime, her body rocking on the floor as her head lay on its side, her tongue lolling out in a state of complete ecstasy. Above her Gentle had mounted his daughter completely, front hooves resting on her back, holding her down, while he pounded her raised plot, lifting her off her hooves with every thrust. Although her brain was shut off for the moment her instincts worked hard to ensure an optimal procreation, her dock keeping her tail dutifully out of the way as her hips tried pushing back against her father with each shove.

Gentle Breeze proved his name wrong once and for all as he bit down on her mane, pulling Fluttershy's head back hard, her mindbroken expression now aimed up at the ceiling. Unfazed, the stud hammered himself inside harder and harder, his ring already accommodated by her stretched foal hatch. With one final push he overcame her innermost barrier, bottoming out in his daughter with a proud whinny as Fluttershy came on his cock again, screaming her orgasm into the air.

His audience watched in stunned silence as her belly inflated outwards, racing towards the floor at an impressive pace. Gentle's orbs gave everything they had for his daughter's first creampie, flooding her fertile insides with the first few spurts. Once Fluttershy was filled to the brim, she too started to leak, semen shooting out from around the fatherly cock and completing the mixed ocean of cum between them. Satisfied, Gentle rode out his orgasm before slowly dismounting his new broodmare, his flared cock plopping out of her abused snatch followed by another stream of white liquid.

Fluttershy was not quite sure who or where she was, or why the warm feeling spreading inside her felt so good yet so bad at the same time. She pulled herself back up on her shaky legs, her hooves shuffling around helplessly as if she had just started walking. With no particular destination in mind she set off, her swayed step leading her in a sharp circle. Her backside was leaking a steady stream of cum, marking the path she had taken across the room. Her legs didn't comply for long, and just a few steps in they gave way, her body collapsing to the ground with a splash, her heaving side resting right in the middle of her family's love juices.

Said family watched silently as her fur slowly started soaking up their fluids, the scent so thick and heavy not even the strongest of rain clouds would be able to wash it back out. Posey was the first to move, pulling herself off Zephyr's softening member before stepping over her fallen daughter, inspecting her unconscious body. With squinted eyes she scanned her belly, scrapped off hoofful after hoofful of the slightly dried cum, coating almost all her fur by now. A sudden triumphant squeal prompted her mates to join her, and all three admired Gentle Breeze's three clouds, resting in between and slightly above Zephyr's marks, barely visible under her new coat color.

"Told her they would look good in a triangle."

A Wet Awakening

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Warning: watersports chapter

"What a fantastic job you two did. You made me the proudest pony in all of Equestria today!"

"Thanks mom, you were amazing too. How did sis do?"

"Oh, she took it like a champ. Can't wait for her teats to grow though, they're a bit flat for my taste."

"Great minds think alike."

"Huh?"

"Nothing."

"Alright my two studs, do you think you have another round inside of you?"

"Guess so."

"Me too."

"Perfect, because I'd hate if one of you felt unfairly treated. Let's think about this for a moment. Zeph got to buck two foals inside his sister and one inside me. Gentle, you have only one inside her right now. So it would make sense if you went right back in and gave her quadruplets, and when you double penetrate me with Zeph later you can have another one with me."

"Sounds fair to me."

"Sure thing. But what should I do in the meantime?"

"I'm sure your father could use some help with breeding Shy again so early, you could lend him a helping dick with a prostate massage."

"A family train? Good idea."

"I didn't know you were this kinky, honey. Be a dear and lube your son back up before he shoves it up my tailhole."

"I will. You'll probably still walk funny if my sore pussy is any indication."

"Ughh."

The yellow heap on the floor slightly stirred.

"Oh right, and somepony should wake Shy."

Posey remarked, looking back at her daughter squirming inside the puddle.

"And clean her."

Gentle added.

"I think I know how to do both at once. And we don't even have to carry her to the shower."

Zeph answered with a devilish grin on his face, stepping up to his sister's head an pointing his still unsheathed member at her muzzle. With a sigh of relief he unleashed his bladder, a hot stream of piss shooting from his length and hitting her square in the face. Fluttershy suddenly stirred, the liquid clearly doing its job.

Gentle looked on unsure as his son gave his sister a golden shower, but Posey next to him just shrugged and turned around. Aiming her backside towards her daughter's chest, she raised her tail and released her own torrent of pee, joining her son to hose their new toy down.

Seeing no objection from his wife Gentle decided to follow their example, closing the circle around the stirring pegasus on the floor, pointing his erection towards her crotch. His stream hit her right on the crotchboobs, and he made sure to guide it all over her nether regions, first cleaning off his own creampie from her pussy, ponut and dock before moving back up
and using his gush to uncover their paternity marks from below the cum coating.

Further above Posey had revealed Shy's now not-so-fluffy chest fluff again, making sure to get all cum stains off her neck that kept flowing down from Zephyr washing her face.

Said pony was clearly relishing the opportunity to get back at the sibling that had pissed him off so many times before. He had succeeded with cleaning her face and rousing her from her sex-induced coma quickly, but his bladder was still not even close to empty.

Fluttershy in the meantime was now fully awake again, unfortunately still too weak to get up on her own. She had to squeeze her eyes shut to protect them from the golden liquid spraying from her brother's dick, and so could only feel the rest of her family being hard at work further below. Her mother's stream was now steadily aimed at the center of her chest, warm rivers of urine streaming down on both of her sides, diluting the wet puddle around her and soaking into her primaries.

Even lower still her father was done cleaning her teats and belly but seemed to be unhappy with the state her sloppy horsepussy was in. First trying to pressure wash her snatch from the outside, he quickly changed his mind and simply jammed his member back to were it just came from, peeing directly inside her vagina.

His son meanwhile had other thoughts.

"Ah buck, why do I always have to pee so much after sex?"

"That's just your body cleaning out your urethra to prevent infections, Zeph."

"Oh right. But her muzzle is already soaked and the puddle is starting to reach my hooves."

"She still has a mouth, you know."

"Good idea!"

"I am just full of good ideas today."

"Not just good ideas."

Zephyr winked at her and turned his attention back, wrapping Fluttershy's dripping mane a few times around his hoof before pulling her face up from the floor. Momentarily out of the constant stream she opened her eyes, just in time to see a familiar green horsecock rapidly advancing towards her mouth. Unfortunately it hung slightly open from the force pulling at her mane, and the next moment the dick slipped inside, forcing it wider open and pressing down in the back. A sharp, aggressive taste assaulted her taste buds as Zephyr's hot piss filled her mouth, bulging out her cheeks and running down her throat. Her stomach was now getting an equal filling as her vagina, and as she hung under Zephyr's side, head held steady by his hoof in her mane and his dick in her mouth, she could do nothing else but gulp down the seemingly endless stream of horsepiss.

Gentle stroked the base of his cock, careful to get every drop inside his toilet mare, before admiring his son's technique.

"You know, that's not exactly the kind of spitroast I had in mind, but it works just fine."

"She swallows piss like a champ. I think I'll have to use her mouth more often from now on."

"Don't let me stop you. By the way, Posey, you are pissing like a waterfall."

"Thanks, that's all the cider from last night. And remind me to get my cooking funnel later, I want to piss in her ass the next time."

One by one the ponies finished, each of them stepping back to admire their cleaning efforts. Zephyr's stream cut off last. He forced out the last few droplets, then used her soft tongue to clean his tip. Unceremoniously he let go of her mane, Fluttershy weakly falling back into the now mostly yellow pool.

Coughing, she flimsily tried to sit up, but her hooves found no traction and sent her right back down, splashing around like a fish on land.

"Puh, that's better."

"Nice job, Zeph. Good as new I would say."

"You too, mom. And what a lucky coincidence she got your coat color, or else this would be quite awkward."

"That's true, she is our perfect little Guttershy. Now Gentle, ready to make me another grandfoal?"

A Bonding Family

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Wordlessly Gentle stepped forward, burying his muzzle under his daughter's side and lifting her up onto her hooves.

"T-thanks dad, I waaa-"

Before she got any further Gentle had put his neck below her midsection, lifting her onto his back and trotting towards the decked breakfast table. Sending all the annoying items to the floor with one quick hoof swipe he placed his daughter on top, earning a puzzled look as she found herself on her back. Quickly he reared up, his hooves landing hard on both sides of her head, his cock now grinding itself up and down her pussy lips. Not waiting for any further objections he pulled back and slid inside once again. Fluttershy meanwhile found herself trapped and penetrated in the same position that had started it all only a few hours before, again powerless to stop the horny stallion on top.

Mother and son walked up behind the copulating duo. Zephyr was already hard again, turned on by the sight of his father rutting his sister, his tail already hitched upwards, presenting his delicious ponut flexing with each thrust. Next to him Posey moved in on her husband's crotch, leaning down to give his testicles a few quick suckles before burying her muzzle under his dock, lubing up his back entrance with her tongue. First circling his outer ring with her tip she then darted forward, slightly parting his asshole as she gave him a good rimjob. Once satisfied she pulled back, gesturing for Zephyr to come closer.

The young stallion didn't need to be told twice, imitating his father and rearing up behind him, resting his weight on his shoulders. Gentle braced against the sudden body on top, pinning down Fluttershy with the weight of two fully grown stallions while still keeping up the assault on her marehood.

Posey admired the view for a moment. Her daughter on the table, legs sticking out on both sides as her husband's hips disappeared between them. Her son close behind, in a similar wide stance as his father before him, his dick hanging in the air just below the table plate and the colliding genitals above. Quickly she dove down and got to work on Zephyr's member, cleaning off her own taste and coating the entire length with her saliva. Her tongue ran from back to front and back again, curling around the green shaft, lubing it up with the sloppiest blowjob she could muster. She opened her mouth wide, closing her lips behind her son's cockhead, swirling him inside while assaulting his peehole with the tip of her tongue. Happy with the result, she released him and used her hooves to guide him into position behind his father.

In a sudden flash of inspiration she spread his cheeks, puckered her lips and firmly pressed them against Gentle's tailhole. She rolled her head left and right a few times before pulling back, a bright red lipstick imprint now decorating his ponut. Playfully she planted a small kiss on Zephyr's tip before grabbing it with her hooves and guiding it against the waiting entrance.

"Now make sure your father can't walk straight for a week."

With that she placed a hoof against Zephyr's flank, pushing him inside his dad. After a moment of resistance his unflared cockhead popped in, firmly encompassed by the outer ring. Zeph's eyes widened, clearly not used to the tightness of a pony plot. Carefully he pushed inwards, for his own and his father's sake.

Unfortunately for he two of them Posey remembered at exactly that moment that she still had a score to settle with her son. The stinging horseshoe mark on her flank reminded her that somepony had been a naughty colt, and naughty colts needed a spanking. Slowly she walked around to the backside of the family train. Rising her front right hoof, she spit in it, carefully took aim, lunged out wide, before connecting her horseshoe with Zephyr's flank, a whip-like crack echoing through the living room.

Zephyr howled as his bottom suddenly burned intensely. The sheer force of the blow drove his hips forward and against a very unfortunate Gentle.

All the air was driven from his lungs as his son's cock straightened out his virgin colon, his anus stretched wide as the entire length, medial ring and all, were shoved inside. Fluttershy wasn't quite sure what had happened, but a sudden forceful thrust drove her entire body further towards the middle of the table, her father now fully lying atop her. Once Zephyr had regained his focus he looked down to see himself stuck completely in his father's backside. Gentle's ponut was pulsating wildly at the very top of his thick base.

He looked around for the culprit, finding his mother climbing onto the other side of the table. Posey lifted her husband's body back up from their daughter, helping him steady his hooves again.

"Sorry honey, the opportunity was just too tempting."

"I bet it was. I'll need an ice pack for that."

"Everything you want. Now move back a bit. And you Zeph, start pounding."

As his father pushed himself further upright, Zephyr relocated his hooves, grabbing his dad around his midsection, just above where his sister's spread legs ended. Slowly he withdrew, admiring the ponut prolapsing outside, clinging to his member tightly. Pushing back inside he was amazed by the tight and warm feeling greeting him as he explored the soft depths. This was certainly a feeling he could get used to, and one his future wife would definitely have to. Angling his thrusts a bit upwards he suddenly drew a sharp gasp from the stallion in front, signifying he had found the right spot.

Now that he was accustomed and had found his father's prostate, Zephyr didn't hold back, pounding away, determined to help his dad sire his next foal.

Posey watched with glee as her son's thrusts synchronized with his father's, pounding her daughter with unmatched strength.

"How do your foals feel, honey?"

"Nnng, they are wonderful, j-just like you."

"Oh, you old charmer. If I had known you were such a bottom I'd have gotten you a strap-on this Hearth's Warming."

"Put it, ah, on the list for next year."

"Will do. Now let me join you there."

Posey slid forward on the table, straddling her daughter between her thighs. Holding her head steady with her hind legs she sat back, planting her dripping horsepussy right on Fluttershy's mouth. Said pony seemed to get the message, licking her mother's marehood dutifully as the fresh air around her was once again replaced by a sweaty body. Posey was clearly satisfied with her daughter's oral skills, grinding herself on the muzzle below as she cupped her husband's cheeks, pulling him in for a deep kiss.

Their family gangbang now complete, each pegasus focused on pleasuring their designated hole. The two stallions each groaned loudly as their hips slapped against their mate, while Posey moaned with pleasure every time Fluttershy licked her just the right way.

Zephyr was the first on to reach his limit, the day having taken a toll on his stamina. He gave Gentle a few extra long thrusts against his prostate before bottoming out and releasing, painting his father's insides a bright white. That in turn pushed him over the edge, his son's deep tissue massage helping him give his daughter below another massive creampie.

As her husband sighed into her mouth, Posey could not contain her excitement for another new family member any longer. She spread her legs as wide as she could before creaming herself on her daughter's muzzle. Fluttershy meanwhile was completely overwhelmed by an onslaught of stimuli hitting her from all sides. While she desperately gulped down wave after wave of marecum squirting from her mom's pussy her dad very clearly came inside her again, no doubt adding another foal to the mix. Her body simply gave in and she came around her father's cock, screaming her own orgasm back inside Posey.

As each of the family members rode out their orgasm in one another their movements slowly died down. The first one to dismount was Zephyr, slipping out of Gentle's ponut, followed by a wave of cum dripping from his backside. Next was his father, drawing his softening dick from Fluttershy's pussy, equally followed by a river of white flowing from her entrance.

Posey didn't stand up, but at least raised her plot in the air to give Shy some much needed oxygen. Instead she leaned forward, eagerly watching her daughter's belly for any movement. Seconds went by as she stared at the fur intently, trying to keep all free spots in between the existing marks in focus at once. Her son and husband joined her, all three waiting for Gentle's swimmers to do their job.

"What happened, did you not cum inside?"

"Nope, that was as hard a nut as always. Maybe she has no room left in her?"

"Nonsense, with her pudgy belly she could carry a full herd."

"Uhm, excuse me, I can hear you."

"Fluttershy, dear, what's the problem? We are waiting for your fourth sibling."

"Oh, uhm, I really think three is enough, considering they are from my father and brother, and I didn't really want-"

"What a load of horseapple, here, let me help."

Determined Posey placed her hooves on Fluttershy's lower half, kneading her fur with a precision only a soon-to-be grandmother could have. Her sensitive hoof frogs could feel the foal batter sloshing around inside as she massaged it upwards, away from the entrance were the precious liquid could leak out. Bringing her face down she alternated between her daughter's teats, suckling on her nipples to give her body the right idea. With one hoof she clopped away at Fluttershy's marehood, grinding down on her clitoris every time it revealed itself, while her other continued the womb massage. Her mates looked on flabbergasted as she stimulated the mare below her seemingly everywhere at once.

A sudden bright light shone directly into Posey's eyes, reflecting from them with a greedy shine. Colored spots started appearing on Fluttershy's lower belly, three distinct shapes appearing on the yellow ground. A group of three more white clouds joined the other marks as Posey let out a victorious squeal. Fluttershy sighed before being silenced by another squirt of motherly cum hitting her in the muzzle.

Zephyr and Gentle smiled at each other as they both admired their work, each of their two paternity marks now adorning their mate's belly.

A Bright Future

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"Mom, you're lactating on my fur again!"

"As if that's just me. I told you to milk your teats more often."

Fluttershy and Posey were the first to climb into their new bed. Custom-built, it had space to comfortably fit four adult ponies, and a frame that allowed said ponies to romp about to their hearts content.

Posey had quickly developed her own favorite sleeping position, resting on her side, face to face with her daughter for some deep goodnight kisses. Their huge, round bellies shared the space between them, their popped-out belly buttons poking each other. The expecting mother and grandmother loved feeling her grandfoals inside her daughter moving around right next to her own foals, as if they were already playing with each other through their bellies.

Further below their crotchboobs were squished together, already full of milk and leaking into each other's yellow coat. Posey had already been a well-endowed mare, her first two pregnancies having given her an advantage in the size department. In contrast the change on Fluttershy was far more impressive, her milkers now being many times the size they were just a few short months ago. Gone were the flat mounds her brother had lamented, replaced by supple mammaries, always filled with sloshing milk, nipples hard and leaky wherever she went. Her husband made generous use of them, Zephyr always happy to buck her between her teats before blowing on her belly, getting a tasty drink from them afterwards.

Said stallion was next to crawl on the bed, coming up behind his mother as her big spoon, covering her flank with a green feathery wing.

"Finally, mommy missed you inside."

Posey cooed before her eyes widened, her son slipping his entire member up her plothole.

"Buck mom, you are the best cocksleeve."

He replied, before a playful squeeze by his mother's ponut made him bite his lip.

Last to join them was Gentle, spooning his daughter in a similar fashion before ramming his own member up her tailhole, grinning at the eep he elicited from her.

Acting as their studs cocksleeves had been Posey's idea. The individual pairings were changed frequently, but she made sure their cocks were always hard and ready should the opportunity for another foal strike. A positive side effect was the insane stamina they quickly acquired, with Zephyr's and Gentle's dicks being hard for hours on end as her and Fluttershy's ponuts could withstand any abuse.

Content, Posey wished her family and her soon to be family a good night before resting her head next to Shy's, their breaths mixing as their embracing stallions were slowly grinding their hips against them, already sound asleep.