In Utero

The anxious mare paced back and forth at the doctor's office, rubbing her incredibly swollen belly as she anxiously awaited the results. Finally the doctor called her in. "I've got some very good news." "Is it a colt or a filly?" asked the trembling, excited mother. "Both! That's the good news! You're going to be the lucky parent of twin foals!" The mother gasped, an enormous smile spreading across her face. Twins!  She rubbed the growing swell of her pregnant belly once again as she imagined her two beautiful and perfect children being born. The doctor informed her that she was almost exactly six months from the expected delivery date, and told her to go home, relax, keep eating well, and report anything unusual that might occur. The happy mother nearly skipped all the way home, so excited was she to be expecting. Back at her house, the single mother prepared a larger than usual dinner for herself. She had already been eating for two, but now it turned out two was three, so she needed to make sure her boy and girl had nothing but the best as she scarfed down her meal and went to bed.

 

She was so excited by today's news that she could hardly sleep. She could almost feel the burgeoning bundles in her belly stir as she lay there, finally feeling a single kick against her taut skin. She nearly jumped out of bed with excitement. One of her babies just kicked! She felt it again. The overjoyed mother watched the swell of her belly intently, seeing it subtly vibrate as a third kick struck her, then a fourth, then a fifth. It just kept going. Were babies supposed to kick this much? She wasn't sure if she should go back to her doctor the next day, if this was really what he would call "unusual." Nevertheless she intended to ask some of her marefriends tomorrow if she should already be feeling this much kicking so far from her delivery date.

 

The rhythmic thumping inside her was a little uncomfortable at first, but she quickly got used to it. In fact, the mare felt an odd pleasure from the shifting foals inside her. Blushing faintly she shook her head and felt a little guilty before closing her eyes and trying to ignore the sensation. After a few minutes the kicking slowed and came to a stop. She could swear that she felt a little bigger before she fell asleep, dreaming of her two bundles of joy. The next morning she woke up to that familiar pounding, stroking her belly as she mumbled loving words to her babies and carefully rolled out of bed. After a quick shower and a big breakfast, she called the doctor and was reassured that kicking was completely normal and showed that her babies were developing nicely. Her fears assuaged, she went on with her day. The foals kicked two more times as she was out running errands, the mare biting her lower lip as the pleasurable sensations grew stronger. After a large lunch and an even larger dinner, she settled down for the evening. She crawled into bed and gently rubbed her foal-swollen belly, smiling broadly as she reveled in her pregnancy. Gasping loudly, she felt her foals start to kick again. The second kick made her moan and cover her mouth with her hoof, her face turning pink as she caught herself getting turned on by the twins moving inside her. She shifted in her bed, her blush getting hotter as she felt a wetness between her legs.

 

At first the mother thought her stirring infants had overly excited her, and she got up to get a towel to cover the stain caused by her dripping juices. When she returned however she noticed that the small puddle on the bed wasn't pure liquid. It had a smooth, creamy texture, almost as though it were...but no, it couldn't be. She wiped up the mess and put it out of her mind, the kicking in her belly continuing as she tried in vain to fall asleep, unable to do so until it had ceased.

 

The next morning the kicking woke her like an alarm. It seemed to be getting stronger. Despite what her doctor had said the mother was growing worried, and decided today she would visit the library to look for a spell to help with her problem. It took nearly all day to comb through stacks and stacks of spellbooks before finding one that suited her needs. The spell if performed correctly would allow the pregnant mare to see inside her own belly, to visually inspect her foals in utero, to make sure nothing was wrong. She packed up the book and left, heading back home as the sun went down. She forced herself to stop and eat dinner, having neglected to eat anything for hours while frantically searching through the library all day, before finally crawling into bed with the spellbook at her side. As her horn began to glow, she felt the kicking begin again as she carefully studied the page's instructions and prepared to cast the spell.

 

Closing her eyes, she concentrated on focusing the magic as the book instructed. She could feel something welling up within her until her mind's eye opened. What she saw made her gasp with shock. Her unborn son was pounding a full foot of baby cock in and out of his sister's thick, sopping cunt. She felt her face grow hot as she witnessed her children rutting each other within her own womb. That heat spread down between her legs as she winked uncontrollably, her mind torn between the incredible pleasure of her children mating inside her and the shame of being so utterly aroused by it. As she fought with herself, she couldn't help but continue watching, her daughter winking hard around her son's erection as she wordlessly moaned in pleasure. The little foal couldn't hold out for very long, slamming into his sister to the hilt as his surprisingly large balls pulled taut. The baby filly shook as her eyes rolled back into her head, her belly swelling until it forced out his cock, her vision going white as cum flooded into her womb. Panting heavily she shuddered as she felt her own warmth and wetness joined by her baby's semen pouring out of her glistening folds.

 

The mother nearly spurted a pint of her own juices along with her son's leftover seed as the spell faded and she felt her warm belly grow still for a few moments. Her unborn son, only halfway through the gestation period, was sporting a cock at least a foot long and two adult-sized testes capable of producing sperm, and her unborn daughter was being rutted by her brother night and day, for at least three days now. She was torn between confusion, disgust, and a deep, sickening lust. The thought of her two children fucking one another was strange enough in itself. The fact that they hadn't even been born elevated it to a strange new level. She knew she had to keep this a secret. She also knew she was going to keep making use of the spell constantly, her curiosity and desire overpowering her disgust and shame.

 

A month later and the mare's belly had swelled even further, her two children growing at a very healthy rate. She had watched and felt her two infants fucking almost constantly, three to four times a day every single day. She couldn't sleep at night when they were going at it, and she always woke in the morning to the rhythmic thumping, quickly casting her spell to watch the lewd display going on inside her. Her son's endowments had grown by another half a foot in this time, the unborn colt already as large as a small stallion, still five months until his literal birthday. His sister was developing a pair of swollen maretits, already larger than the nubs possessed by even school-age fillies.

 

At the eighth month, her son had swelled to a full two feet and his balls were heavy and packed with seed. His sister's teats jiggled softly as he rutted her several times a day, her thickening lips spread around his girth as she winked hard around him over and over. The mother's shame was almost worn through, replaced by an intense raw lust for watching her children rut within her womb. It got to the point that she was unable to resist using her magic to tease and rub her maresex as she watched her son pound her daughter hard. And his growing balls meant that she was forced to find a place to squat as his cum and her juices sprayed out of her when their shared climaxes rushed through her body. By the ninth month, she was completely shameless, lying in bed at home and gently rubbing herself as she waited for her kids to recover. Watching intently with her magic, she saw her son slowly unsheath, his thick erection as large as some stallions' and his balls bigger than most. His sister winked and thrust her ass at her brother, her swollen teats wobbling as he positioned himself to thrust. The mother couldn't help but coo and encourage her children.

 

"That's it, fill your sister's little womb with cock like a good little boy. You're my strong little man and my cock hungry girl. Show your mother how much you love her and make your brother c-cum nice and hard. There you go, w-wink him in until his flare's butting up against your tight little cervix. Such g-good children, and they're not even b-born yet!"

 

Around her ninth month, with still three more to go, the now-shameless unicorn mother did little else other than stay home to watch her children fuck all day, their stamina increasing to the point where they were now going at it almost constantly, taking only short hour-long breaks in between sessions. The horny mother had finally learned to sleep through her children's rampant thrusting, always waking up in a puddle of cum like she'd been rutted by a champion stallion in her sleep. Her son's nearly yard-long cock  was now spending more time inside his sister's sopping pussy than outside of it, and the little filly's belly was swollen with cum. If the mother pressed her head to her belly, she could almost hear her two children moaning as they continuously screwed inside of her. The infant filly had even started lactating a bit, tiny drips of milk joining her brother's semen slurry as it drained from their mother every few hours. At ten months the mother was enraptured watching her studly foal's nearly four foot cock drill the baby girl inside of her, the filly's own belly so swollen the mother was almost certain she was pregnant herself, although she was unable to use the spell on her unborn child to check. Still, the thought of having two generations of foals inside of her made the horny mother nearly cream herself again before her son's ejaculation took care of it for her.

 

A month before she was due to give birth, the mother's constant arousal and her children's incessant mating sent her mind into more and more depraved places. She'd sit on the edge of her tub and howl with pleasure as her son's four and a half foot cock poured thick jets of cum out of her maresex. Along with her daughter's thick, leaking nipples gushing her foalmilk and her own copious juices, she was able to fill the tub in only an hour of unending climax. Climbing into the tub, she focused her magic on teasing her fat clit as she bathed in her unborn children's sexual juices, crying out as she brought herself to climax over and over.

 

As the day of her twins' birth drew near, the mare sat in a pool of cum and milk, watching her son's five-foot foal cock piston in and out of her daughter, making her teats wobble and gush rich cream. The mare's own swollen teats leaked profusely, her body preparing to feed her incestuous twins as she winked and climaxed, crying out to her children.

 

"Such g-good children! I'm such a lucky m-mother to have such a well hung c-colt and a filly permanently haahh hahh permanently in heat! I can't wait to l-let you out soon so you can drink up all my m-milk as you rut each other like the sweet young f-foals you are! And the thought of getting to feel my l-little stallion's f-f-flare butting up against my cervix as I g-gulp down my daughter's r-rich cream is just... just... hgggnnaaahhh!"

 

The mother decided to birth her children at home. She had prepared several spells to make the process safe and painless. When the day finally came, the mare sat in her fluid-soaked bed, legs apart, as she felt one of her children press against her lips from inside. Eventually the head of her darling son emerged, his eyes blinking in the bright light as he looked up at his mother for the first time, his five-foot dick still embedded in her. As the huge cock emerged, it brought with it the flailing rear legs of her daughter, the foal's brother still stuffed partially inside of her even as they were being born. The mother cooed at her children. "My big strong boy just can't get enough pussy to satisfy his big thick cock can he? Well from now on you'll have two pussies to rut whenever you want." The daughter continued to slide out of her, the ridge of her own overfilled belly making it a bit of a squeeze. Finally both of her children were out, her son thrusting a few more times into his exhausted sister before basting her insides with cum. He then withdrew, his still-hard cock bouncing up and down as his mother took him in her hooves and placed him at the entrance to the birth canal he'd just left. He needed no prompting as he immediately thrust back inside her. She lifted her daughter up to inspect her sopping maretits, each nearly as big as her own. Her baby boy was now suckling from one, and she laid her daughter across her belly to have access to the other one. Then her horn began to glow as she finally had her chance to cast the spell to see what exactly was growing in her newborn daughter's womb.

 

Closing her eyes, she leaned forward and took her daughter's thick nipple into her mouth and suckled hard. Drinking down her rich cream, she moaned into her teat as her nursing son pounded into her stretched womb. Concentrating, she worked her magic again, first deciding to cast it upon herself again. As her vision focused, she watched intently as her son's thick flare thrust in and out of her womb, the sight of his infant cock pounding her getting her whimpering and lapping at her newborn daughter's teat. Winking and milking his shaft as best she could, her mind raced with the thought of her son impregnating both her and his own sister on the day he was born. They both climaxed simultaneously, the mother quivering and popping off of her daughter's teat with an impassioned cry, staring as she watched rope after rope of viscous spunk splatter against her filling womb.

 

"Yes! That's it, g-give your mother another set of hnnaaaaaahhh hhaah twins! Empty those b-big infant balls into your former h-home just like you aaaaahahhh haaahh hahh like you did to your s-sister for the p-past six months!"

 

Her mind swimming with pleasure, she extended her spell to her daughter at last, watching both her son's cock spurting and swelling her and her daughter's womb churning with life.

 

The mother's horn glowed as her daughter's belly became transparent. Looking inside, she saw not one foal, but two, both cute little boys already sporting close to foot-long erections at only five or six months along. She beamed thinking that her daughter was going to be a mother herself before her first birthday. And she'd be a grandma! She gave the two infants a look over. They were resting at the moment, each using the other's tremendous cock as a pacifier. That's when she noticed two little nubs above their stiff groins. Looking closer, she saw that hidden away in the shadow of their stallion-sized balls, each infant had a small gash. They weren't males, they were hermaphrodites. The infant girl's incestuous breeding had given her a pair of identical futa twins. As she reflected on this, she felt her son's cock spasm and unload thick volleys of potent sperm into her empty uterus. The horny newborn didn't even take a break as he immediately began thrusting again, eager to cum for a third time in a row, his enormous balls desperate to be drained.

 

The day went on like that long into the night, the son swelling his mother's belly back up to her pre-delivery size with nothing but viscous foalspunk before pulling out and basting his sister's slumbering babies with seed. Spent for the moment, the mother held her son close, gently massaging his shaft with her magic as she kissed and licked at his flare, eager to give him wet dreams about his mother and sister. A month later their ritual had changed significantly. Now the mother awoke to her son's flare swelling inside her as he filled her with a fresh load of sperm, her daughter rubbing her jiggling belly in her sleep. The perverse single parent had worked some enchanting cantrips into her womb-revealing spell, rendering her grandchildren constantly visible. Mornings would have one mounting the other, their swiftly developing maresexes almost dwarfed by the one and a half foot cocks they took turns thrusting into each other. Once her big strong boy finished cumming inside his mother, he pulled out with a wet pop and moved to his sister, his mother levitating over a rubber dildo discreetly cast from her son's girthy cock and stuffing it into herself as she eagerly watched the show her children were about to put on for her.

 

Moaning softly in her sleep, the daughter's drooling maresex eagerly slurped down her brother's cumslick erection. The mother stifled a moan as she pounded herself hard with the dildo, biting her lip as she watched the flare push roughly into her womb. The twin hermaphrodite foals turned and grabbed the intruding cock almost as if by instinct, their tiny tongues lapping eagerly at the thick flesh even as they continued to rut each other. The boy's tongue lolled out of his mouth as he grinned widely, both he and his mother greatly enjoying the additional stimulation as he worked himself towards another climax.

 

Steadily nurtured by their brother and father's seed daily, the twin dickgirls developed at a brisk pace, their cocks growing to around two feet, one or the other nearly always shoved into a pussy or mouth. The daughter loved the feeling of her babies playing inside her, and she loved continuing to take her brother's cock day after day. The horny colt was insatiable. His now five-and-a-half-foot cock seemed to have almost no recovery time, and he spent every waking moment fucking. It seemed at time that two pussies might not be enough for the overeager colt. If that weren't enough the mother of two was now blooming with a third, another colt, only a couple months along but already showing signs that he was going to turn out to be a big boy like his brother/father, this fetus also nurtured with a steady diet of foalsemen. Two months later and the infant's coltcock had already grown to two feet, surpassing his brother's development slightly. And as the horny colt roughly thrust into his mother, their cocks aligned, the infant inside of her rubbing his dick against his father's six-foot monster, cumming roughly. The mother found herself almost feeling sorry for her little tyke for not having a warm pussy to thrust into.

 

As her son slowly withdrew from her she felt a stirring in her womb and watched as her still-hard foal turned around. Pressing his flare against the other side of her cervix, he thrust forward making his mother yelp in surprise and lust. Her second son hadn't even been born yet and he was already rutting his mother! The exotic nature of the sensations had her moaning and gasping for breath, her baby fucking her from the inside out. Seeing his mother's open mouth, the colt crawled atop her pregnant body and presented his tip. In her haze of lust, she lapped at it and cooed at her infant for being so delightfully bold.

 

"Ooh, such big s-strong boys I have! For giving your m-moooaaaaahhh hhahh mommy a good p-pounding and filling her up with y-your thick f-foalcum hggaaah!, you deserve a s-special present. Since o-our baby's using my m-marecunt right now, you haaaaahhhahh hahh hahh get to use my th-throat. It's just like r-rutting mommy's womb, except youuuuuggghhnnk you thrust into my l-lips and fill up my stomach with y-your sweet, m-musky cum!"

 

As the months went on the two little futa foals continued to alternate fucking one another until eventually they somehow manage to figure out how to align themselves so that each was hilted in the other simultaneously.  From then on they never separated, their near-constant thrusting making the little filly's belly quake and ripple as she either suckled at her mother or scarfed down her brother's six-foot dick. The infant colt inside their mother was also growing rapidly, and at three-and-a-half feet long his cock was actually beginning to press against the folds of his mother's vagina from the inside, and he was still many months from being due. The insatiable older colt would constantly ram his cock into his mother only to feel it slide alongside his son and brother's own turgid dick, and the two would grind together as the colts frotted and fucked their mother simultaneously from inside and out.

 

Soon the mother proudly stood in front of the mirror, her baby's flare sticking nearly a full inch out of her. She winked around it, gasping as she watched it swell up and spurt hard, coating the glass and obscuring her view as her foal came hard. Her son grew adept at sliding in above his brother's cock, slapping his flare with his heavy balls as he rutted his mother, groaning and saying his first word over and over again as the foal slurped at his tip deep within his mother's womb, "Cum! Cum! Cummm!" Both boys would climax at nearly the same time, the infant son on the outside getting his musky nuts painted in hot sperm as his baby brother/son gulped down thick gouts of seed as best he could before simply lying back and getting absolutely soaked in semen.

 

The daughter spent her days groaning and clutching her shifting belly, watching her daughters fuck and bloat each others' wombs with seed as leaked gallons squirted from her climaxing folds. She'd crawl to her mother when she wasn't being rutted so she could drink deep from her swollen, milky teats. Occasionally, she'd slip lower and pop her unborn brother's flare into her mouth, suckling and gulping down his mayonnaise-thick semen. Unbeknownst to her, every gallon of cum she swallowed was making her daughters rutting each other within her grow larger, their balls surging in size as their marelips thickened considerably.

 

As they neared delivery the two futa infants were now sporting a yard of cock each, permanently thrust into one another as their mother lay in bed staring at the enormous mountain of her belly. Her two babies were each nearly half the size of her own small body, and so their grandmother made sure to keep plenty of spells handy to keep her pregnant seven-month-old happy and stress-free.  When the day finally came, the two infants came sliding out entwined in one another, still thrusting and fucking even as they were birthed. The little colt infant inside of their mother's mother was about five months along himself, and already sporting five feet of cock, a foot-and-a-half of which was permanently outside of his mother's pussy, making it look like she had her own cock. As soon as the birthing was finished the overjoyed mother lifted her daughter onto her lap, spearing her onto her baby brother's cockhead as the mother did the thrusting for him. The two dickgirl foals were placed between them, four sopping teats for them to choose from while the eldest son facefucked his mother the whole time. Their perverted little family was slowly coming together.

 

After months of waiting, the mother knew it was time. Almost an entire yard of ready-to-be-born colt erection was hanging out of her maresex, the mother spending each day fucking her daughter with it and swelling her with cum as her own stomach bulged with her first son's flare. Taking a moment to pull her daughter free so she could drain, she slowly pressed her foal's erection back into her womb. Groaning and moaning with climax and her contractions, she began to push out her new baby as the daughter cooed and winked hard around the cock being birthed directly into her. Holding her tight, she bore down and squealed around her son's cock in her throat, another few feet of infant dick surging into the filly's body. Soon she felt the bulge of her son's body stretch her lips as she pulled away, her newborn son hilting in her daughter and cumming hard, both foals moaning as they came together.

 

As the perverted family gathered together for the newborn's birthday orgy, mother and daughter lay back as the two futa twins shoved their four-foot cocks into their mother and grandmother. Once they were in position, the two colts lined up their fat flares with the foals' cunts, the seven-and-a-half foot older brother drilling the one fucking his mother, and the younger but more rapidly growing colt sticking his six-and-a-half feet of newborn dick into the dickgirl plowing his half-sister. The lewd, perverted family fucked one another for hours and hours, every womb swollen with cum, each almost guaranteed to become pregnant and start the cycle anew.