Fear.

Excitement.

Arousal.

There was no way for Trixie to distinguish between the three powerful sensations… not in her current state. She was just a teenager! Only minutes before she had just a blushing, inexperienced filly… for whom the thought of romance, lascivious actions, or anything even resembling the like was something left for the giggling and tittering hallways of the girls locker at school… or for some imagined hunk at the senior prom.

And now, a steaming, snorting stud was mounting her.

And yet, that heady mix of adrenaline, fear, and arousal was so insistent… it burned so brightly in her psyche… it felt so… natural. Evolution had left its indelible mark on pony-kind, especially its mares. Celestia’s guiding hoof throughout the millennia had made sure that the drive to reproduce, to copulate, to breed and be bred would always stay as poignant in the magical oils of her subjects as it had been eons ago in their feral ancestors on the primordial Equus plains.

Her leaking, quivering teenage body was ready.

Submissive.

The pony who she referred to as her employer was about to become her lover. Her harem-master. Her stud.

The powerful strength of his muscles as they positioned her on the couch edge left her no question as to whether resistance would have any effect… even though resistance was the farthest thing from her addled mind.

She moaned, feeling her body lurch in its yearning for a stallion. Powerful contractions wracking her as her blue tail flagged up even harder, lifting the wet mop of sweat-laden tail hair high into the air, waggling with attention-drawing insistence to pull the eye of her stud toward her winking, squirting marehood.

The hard back of the couch dug into her hips as Filthy prepared her for a fitting, traditional pony-style mounting, but it left her hooves dangling inches off the hardwood floor, perhaps for the best - her body might not have been able to bear the weight of her stud on her back in its shaking state.

She heard the heavy clattering of hooves as Filthy lifted himself up onto his hind legs, heard the dull thumps on either side of her head as his forelegs landed on the couch next to her.

And then he was on her.

His whole bulk pressing against her slender unicorn back. His chest was so big, so heavy.

Yet it wasn’t uncomfortable. Not at all.

It was strangely comforting, like being smothered in a blanket, wrapped up in the hug of a loved one. She felt strangely at peace through the shaking haze of her excitement, completely at the whim of her new lover’s desires.

That’s when she felt it.

The hotter, wetter mass of a different sort, sandwiched between their two bodies.

His big, fat, stallion cock.

The rigid beast rested in the small of her back, tracing a ridiculously long path up the furrow of her spine. It felt almost like he reached up to just beneath her shoulder blades. For the first time it struck her just how terrifyingly testing this would be, for her to service a real stud like Mr. Rich, for her body to accept even a portion of his generous endowment.

But goddesses did she want to try. Her feminine instinct demanding the attempt be made, and more.

She needn’t have worried.

Her partner seemed to be just as much in rut as she was, and he certainly was beyond caring about the distinct difference in sizes and any challenges that might present. Filthy’s switch had also been flipped, and he was going to bury his magnificent sword into Trixie’s steaming teenage snatch, one way or another.

He snorted and stomped again, dragging back his huge phallus, as he tried to reposition himself for proper entry. Sliding the big slab of meat backwards left an obscene trail of creamy cum-stained blue fur in its wake, painting his teenage babysitters back as he dragged his slimy flare over her tight, athletic asscheeks, searching for his target.

The large flat heat of Filthy’s flare bumped over Trixie’s dock, involuntarily making her clench with unconscious apprehension as the saucer-plate-sized bellend bumped over her tailhole… a sight and feeling of pure and ridiculous impossibility… and yet it still made her quiver with the sensation of her delicate taboo-rosebud being prodded.

But Filthy had another target in mind, and he was not so foolish as to break his filly, in body and mind, perhaps irreparably, on their first encounter by attempting her tailhole.

That could come later.

No, he needed to breed this little one.

And so he slid further down, until their two boiling organs met.

Like the long-awaited embrace of two lovers at the end of a romance novel, their swollen, throbbing genitals kissed.

The huge, shining black dome of Filthy’s cock-head pressed into the pink opening of Trixie’s winking teenage fillyhood.

But it could not go far - the slender, vise-like opening into Trixie’s velvety depths had not been tried or tested, not even by a hooftip or a hairbrush. Trixie had always been a filly who preferred to play with her outer bits, and though the flesh was young, it could not part for such a huge invader so easily.

“Ah...ahhnnn!” Trixie’s head lifted up and stared forward as she felt that first desperate kiss, felt a stallion-tip inside her, felt anything inside her... for the very first time. So alien, so frightening… and yet so natural and right. A cacophony of paradoxical sensation.

But she could also feel the magnitude of her challenge. Could feel the burning spread of iron-hard flesh as the huge press of cock moved forward… began to grind its way into her nubile body, agonizingly parting the flower of her youth.

The strain hurt. But in a good way.

She wanted him in her, wanted it more than anything she’d wanted in her life. Perhaps she didn’t even know the meaning of want before this moment!

But her body could only yield so much.

Quickly, the large flat press of cock began to mash against her sex, mushrooming the rigid head against her lips, the edges of his knobby flare pushing against her outer-labia, even grazing her thigh with its obscene wideness.

“Mmmn… p-please…” She groaned, wriggling herself back against her new stud, doing anything she could to assist in cramming more cock into her body.

But this was a stallion’s job. And Filthy was more than equal to the task.

She heard the groaning squeak of horseshoe against wood as his powerful hinds dug into the floor and he pressed home, ratcheting up the force to terrifying levels. She felt his muscles roil and bulge on top of her as he tensed and focused, squeezing more and more against her. She heard the back of the couch creak as it bent, the force of their un-culminated penetration transmitted through her hips into the finely crafted furniture.

And her tight pink inner lips slowly parted, agonizing millimeter by millimeter, straining with their utmost to slowly roll out the sides of Filthy’s massive flare, like a foal-birth in reverse… an erotic flower of blue and pink petals blooming more and more.

She felt his cock begin to press into her exposed clitoris, mashing the poor nub up against the hood of its confines, compressing it through the sheer bulk of cockflesh pressing up into her. The sensation drove the breath from her lungs, leaving her a gasping mess of sensory overload.

And then he slipped in.

His huge head slipped in.

Into her.

Her tiny body, her most delicate opening… he was in her.

“F-f-fuuggnnhh!” A half-uttered invective died on Trixie’s lips and morphed into a delirious groan as her head swayed uneasily.

Her tight pink lips had slipped around his knobby flare, kissing up against the top part of his shaft, gripping Filthy with incredible tightness as it welcomed him to her grasping silken-tunnel.

He was in.

And now he was going to fuck her.

This didn’t seem possible. For the extent of her young life Trixie had never had anything inside her fillyhood. Those delicate, pink, twisting, walls had only known the feel of their like… the slender grip of the muscular sleeve entirely closed, shut to even the atmosphere of Equestria.

Now a huge, ramrod stiff shaft of fat cock was pressing into her… plowing her open, filling her abdominal cavity with masculine intrusion, stuffing her so full of stallionhood that she thought her body was going to burst.

Fold after fold of her carnal depths were stretched asunder… pink wrinkles of vaginal muscles grinding and sliding over each knob and vein of Filthy’s steel-hard erection, molding her insides to his shape as he plumbed deeper and deeper.

That first thrust seemed to go on forever.

Like a yew bow, screwed up with barely restrained pent up energy, when his head had finally slipped into her tight little flower, his length quickly sprung deep inside her, driven by the powerful hips and grip of the stallion’s hooves.

Inch after inch slid inward… millimeter after millimeter of black horseflesh sending her abused pussy lips on a bouncing, bumping, grinding adventure… smushing her exhausted clitoris against the bottom of his shaft and her fully strained lips as he went.

Only when he finally reached this medial ring, two-thirds of the way down his steaming ebony cock, did he finally pause. The fat donut of blood-engorged penis-meat simply could not enter her, not yet. The significant marker separated the relatively slender upper half of the earth pony’s tremendous cock from its rapidly thickening lower base… which quickly became girthier than even his cockhead.

Trixie mewled, spittle dripping from the side of her limp mouth.

Her mind was completely awash with pleasure-sensations. It was no longer the raw, unbelievable electric fire that had assailed her exterior nerves - her clitoris and her lips. Now that poignant, hot euphoria was matched with an equally intense wash of dark, boiling desire from deep inside her.

The feel of her inner-most nerves, hitherto untouched, unstimulated, bursting into life as she was completely speared, it made her rethink her very purpose. At her most foundational element, she was a mare.

And this pleasure was her only purpose.

The great, sucking vacuum of Filthy’s outstroke was almost as intense as his arrival. The stallion pulled himself back, drawing out the teenager’s tight depths, her velvet walls clinging to him in a desperate embrace, trying to hold him inside her.

Trixie writhed and groaned again, her hooftips kicking involuntarily at the air as her stud agonizingly pulled himself out of her. She could feel her puffy, swollen labia… so recently stuffed with overwhelming force inwards, now being pulled out… stretching like the skin of a pink balloon as their tight grasp held onto the invading shaft as long as they could.

And then, just as Trixie felt the fat bulge of Filthy’s cockhead bumping through her lower belly, pulling back close to the entrance of her disturbed, carnal gash… as the hoof-sized end began to spread her pussy-lips from the inside…

He reversed direction, slamming himself back forward.

Again Trixie felt the breath slammed out of her, felt the throbbing meat of insistent stallion-dick pressing against her diaphragm as it cleaved her, almost winding her as it drove home, deeper and with more force.

She wasn’t as stunned as the first penetration, and was now able to more clearly sense the heavenly satisfaction of that purpose-built probe grinding up her insides, of his bumpy cock vibrating her clit… but those increased senses didn’t allow for any coherent thoughts to form.

Her mind was stalled, frozen.

A computer program stuck in a recursive pleasure loop that mounted higher and higher with each passing moment.

The stud continued to pound his teenage broodfilly, the in and out action increasing in pace as he went. Each thrust slipping in a little faster, or aiming at a different angle, or pressing ever so slightly deeper against her quivering entrance, toying with the idea of pushing that fat ring of cockflesh into her body.

The pleasure logic loop continued, neurons firing faster and faster in Trixie’s cortex, each wave being overtaken by an even stronger one behind. Only dimly now could her weakened senses interpret the subtle changes in the intense fucking she was receiving...

Sound… Her ears, one pointed backward, one pointed upward in haphazard muscle confusion, twitched at the new sound of obscene squelching as her boss bucked inwards. She could also hear the strange groan-squeak of her own voice, timed to Filthy’s bucks. For his own part, Filthy made no noise - only the deep huff of his hot snorts as he powered his terrific physical exertion with great draws of oxygen.

Touch… Her inner-thighs felt the soaking trickle of a constant stream of her juices, pouring from her body as if she were a foal wetting herself. The hot blast of air against the nape of her neck from Filthy’s deep huffs made her realize just how alive he was, how real the gift of pure ecstasy her stallion was giving her.

Smell… The air was drenched with the reek of sex. The couch would never smell the same again. It was as if she were bathing in the musky stink of Filthy’s sack - and her own cinnamon odor mingled with his in the fog of the room - a coitus of their pheromones analogous to their own union… but deep within the olfactory steam was the barest hint of a different mare’s arousal, a floral umami.

Sight… Her vision was blurry and wavering, formless colors and dim shapes. Her heart-shaped pupils shuddering wider with the culmination of each pounding thrust from the stud fucking her. But suddenly, out of the haze...

Spoiled.

Trixie could only groan as the sweating, excited face of the prim matron slid forward, not hesitating or shy in any way as the pink muzzle parted and twisted, aligning it to plant a deep prench-kiss. The tongue which had given her so much pleasure before slid without hesitation into her gasping maw, choking off her oxygen and forcing her to wrestle it with her own in a losing battle, a vain attempt to draw air from Spoiled’s lungs.

But Spoiled didn’t care. Her long pink tongue easily overpowered Trixie’s, sliding down the back of the babysitter’s throat and slathering saliva down the blue-unicorn’s esophagus.

Her whole body shuddered, nerves winking and popping at the lack of oxygen and the sudden shock of a mare kissing her so deeply it felt like a tongue-fucking.

And she came.

Hard.

Blue-purple fireworks spattered around the room, singeing the white fabric of the irredeemably-soiled couch.

Trixie’s scream of terrified-pleasure was muted by Spoiled’s covering mouth, as both of the adult ponies fucking the teenager gripped harder against her wild, bucking motions.

Her dangling legs kicked and thrashed with each successive wave of oxytocin-heavy neurochemicals washing through her system, demanding more out of her exhausted muscles than her body could provide.

Trixie was lost in the thrashing sea of pleasure, in the feel of her pussy spasming, clenching and milking, spraying hot splatters of teen-pleasure-juice wildly… and slipping ever so slightly wider…

*POP*

Instantly Filthy’s medial ring slipped inside her. No other pony beside his wife had been able to take this alpha stud beyond the impossible limit, but Trixie’s erotic gate had strained, stretched, opened to receive the sublime gift of a real stud’s enormously girthy base.

The huge, log-thick lower third of Filthy’s cock slammed into Trixie.

Any sensation of discomfort was completely overwhelmed by the ongoing surge of her continuous orgasm - the huge bulge pressing out her lower-abdomen, the dangerous shifting of her organs to fit the powerfully-sized stallionhood inside her smaller skeletal structure, only added to the mind-melting sensation of being completely owned by her stud.

Only the dull thump of Filthy’s battering ram of a cockhead against the limit of her vagina, the wet impact of his throbbing flare against the clenched portal of her cervix, preventing Filthy from overcoming that final barrier and driving into her very uterus, into her womb. Only that struck a bell loud enough to make her jerk her head clear of Spoiled’s embrace, opening her mouth to take in a deep lungful of air

Still in the throes of her orgasm, Trixie’s head thrashed left and right, her whole body quivering amidst the overpowering feeling of being completely speared on a cock.

Filthy and Spoiled only shared a brief grin before they both returned to their meal.

Filthy’s hips quickly resumed their pace, as he pressed more weight down through his body onto the chaotic and uncontrollably thrashing teen underneath him. But she was no match for his bulk, nor his skill… not in her state of unending orgasmic convulsions…

And so he began to pound her.

They were deep thrusts that drew back to her entrance, before slamming in with a half-step and a jerk of his hips… sending nearly all of his length into her with each stroke. His fat, veiny base was stretching her so wide at the bottom of each cycling, hammer-like thrusts that his cock was touching the inside of her thighs, compressing all of her plot as it stretched to accommodate him.

*PLAP*

And with each strong hip-movement, a wet, meaty impact filled the room: his heavy, shotput-like balls were swinging forward and up to strike the filly’s sex, quickly becoming soaked with the unending stream of nectar drooling from her abused cunt.

“OhHnnHn…. f-Fuf… fuu… fu…”

*PLAP* *PLAP* *PLAP* *PLAP* *PLAP*

“Fuu… fu… F… F...” Trixie’s moans were entirely incoherent. Just random syllables formed by the passage of air over her vocal chords as some part of her brain misfired and attempted to make sounds equal to the mind-melting pleasure she was feeling.

*PLAP* *PLAP* *PLAP* *PLAP* *PLAP*

The teen’s eyes had already started to roll back in her head.

“Shut her up, would you sweetie?” Filthy growled through his teeth in between one of his heaving breaths.

Spoiled chuckled, then slipped forward, intending to take Trixie’s mouth in yet another kiss and let her husband enjoy his rutting of the babysitter with only the accompanying sounds of wet meaty flesh slaps…

But a small thrash of Trixie’s head at the last moment brought the teen’s horn slipping into Spoiled’s mouth instead.

…

All Tartarus exploded at once.

With all of the feral, dominated, overwhelmed teen-orgasm sensations flowing through her, no rational pony could have supposed that there was any way for her to receive even a scintilla more pleasure.

But a unicorn’s horn is special.

Very special.

Like a conduit to their cutie mark, a conduit to their soul. Touching it at the right moment could lead to a connection greater than the physical or the emotional… it was spiritual.

This was such a moment.

An explosion of magical energy cascaded out of Trixie’s body, lighting Spoiled’s closed muzzle with the light of energetic magical sparkles, as Trixie screamed aloud, powerfully enough to shake a priceless vase off the nearby coffee table.

Trixie’s eyes shot open, all of her awareness rushing back to her in an instant. Like somepony had switched a lightbulb on in her mind, letting her form thoughts and memories and retain awareness of everything around her.

And yet, the sensations that had been boiling her, had been melting her mind to mush intensified.

She was wracked by the insane pull of fear and anxiety, the tension between the delightfully cute awkward shyness of a virgin teen experiencing her first-time with an older, more experienced couple… and the feral, Celestia-given instinct to entirely submit to her biological imperatives, to be carried away on a wave of pleasure-hormones and be bred by her stud.

And now, a bubbling swirl of her soul was raging at her very core, deep within her womb. The connection between her horn and her womb was unlocking this spiritual orgasm… this ur-gasm…

A pleasure so complete, so total… one she could witness consciously, instinctually, and spiritually.

She wanted nothing.

She wanted everything.

Her whole being sparkled and cavorted… muscles, nerves, thoughts, and magic. The whole thaumic field around her shuddered and sparkled.

This was her purpose.

In this moment, she needed this. Needed every inch of pleasure she could drink in, though it was careening into her like a firehose. She drank it in from all sides, her magical horn absorbing and emitting, her mind calculating and melting… and her body receiving and giving… as she thrusts back with wild abandon and her rending cry reached a new octave.

“F-fu-fuuuuuUUUUUUUUUUUUUCCkKKKK!!!”

Through the thaumic fog of perception, she could feel her ovaries… could sense them, a vision of them releasing a payload in response to all of this raw experience as if her body and soul knew that it had to cooperate with destiny.

And then, just as she bucked backward, grinding her hips desperately into her stud, her cervix opened, just enough, with the aid of her magical essence...

And Filthy’s huge cockhead slipped inside of her womb, plowing all the way to the opposite wall in a moment as he fully hilted inside of his babysitter, his massive balls swinging up in a final swing.

“Ah… AHNNN!” Filthy’s groan came in perfect time with the final thrust.

A heavy throb pulsed up through Filthy’s already tremendous cock, bulging up his shaft as it raced toward his head, which flared and blossomed to a terrifying size once again.

All three ponies were slaves to their pleasures now. Stuck in agonic groans, orgasms, and thrusts… as Filthy began to cum.

To breed.

To fill his daughter’s new babysitter to the brim with his seed.

“Ah! AH! AHHH! AHH!” Trixie croaked out, each grunt coming as a powerful pulse of stallion spunk blasted into her, each one lasting a whole second and jetting out tremendous, cup-sized quantities of steaming batter into her womb.

Blast after blast splattered into her, soaking her very soul, churning up a hot, glue-like stew of Filthy’s spunk.

His huge flare was jammed into her uterus, plugging even a drop of the rich genetic material from escaping its fertile confines… which quickly began to show an external effect on the teen’s small belly.

“AHH… AHhnn… ahn… ah…”

Her abdomen began to grow, first just a little chubbiness around the already large bulge of Filthy’s fat stallioncock, just above her teenage-teats… but quickly expanding to a larger and more obscene size.

“Ah… mmm…. Mm…. y-yes…” Trixie whispered, coming down slowly from the nirvana of her climax, her dim awareness focusing in on the spurting stallion-hose inside her, still cumming nearly a full minute after they had all summited the highest peak.

She felt her belly ponching outward, more and more, now making her look fat… then like she was within the second trimester with foal… until finally, with a last nicker, she heard her stud’s hooves slip on the floor and all of his weight land on top of her… and his unconscious chin dropped hard enough on the top of her head that her eyes sparkled and rolled...

Whether it was the impact, or the exhaustion, a dark tunnel crept up the outskirts of her eyes, and the last thing Trixie saw before she passed into a sleep made all the deeper by the complete and total exertion of her very essence, by her massively stuffed womb… by her aching but entirely satisfied-body... was the grinning but magic-scorched face of Spoiled petting Trixie’s mane in comfort.

Author's Note

Woof.

Filthy just recked Trixie for every pony to come after (except for Bawdy Jot of course)...

Let me know if you liked the scene, did you think Trixie got sufficiently rewarded?