“Jeez Matt, leave some for the bedroom!” Julie giggled as she deftly tugged on Marabelle’s reins. The paint mare obeyed, stopping in place as Julie’s boyfriend sitting behind her atop the horse winced and groaned.
“Why… did you convince me… to ride bareback… with you…?” Matt wheezed atop Marabelle as him and his girlfriend rode together, keeping a death grip around Julie’s chest as the mare began sauntering forward again along the forest trail. With every clop of the horse’s hooves, Matt winced, feeling the groin of his jeans slam against the equine’s back with every step. “I don’t think ‘the boys’ down there can take much more, Julie.”
“Heh, Marabelle didn’t let me put a saddle on today! She wanted to go bareback! And besides, what do you mean? This is fun!” Julie said cheerfully as she kicked Marabelle’s side, making the mare jolt forward, hooves thundering a hundred feet down the trail leaving Matt yelping in pain. Riding bareback was amazing to her. The feeling of Marabelle’s powerful body stroking against her bottom, the primal feeling of an entire horsepower of animal raging right against her most sensitive of areas – it was too wonderful to describe in words, all she wanted was for her boyfriend to feel it too.
“Well, I fucking wonder why! You ever thought that maybe it’s because you don’t have balls?” Matt yelled back to her, grabbing the horse’s reins from her hand, forcing the horse to stop. “If I ride the whole trail bareback, they’re gonna need to geld me by the end of this. I’m getting off. Walking this trail on two legs is a helluva lot better than an hour of cock and ball torture.”
“Hey, wait!” Julie shouted back to Matt, “Okay, fine. We’ll head back to the stable and get a saddle for you!”
“Whatever. I’ll catch you back at the stables, alright?” Matt said, hopping off the mare’s back and leaning against a tree to try to aerate his balls. Julie nodded, whipping her legs against the mare’s side expecting the horse to gallop in the direction of the horse farm… but she didn’t.
“Marabelle… Go that way! Go-“ Julie yelped as the mare suddenly turned and sped off in the other direction into the forest. Julie tried to tug on the reins to get her to stop, but this just seemed to get the mare riled up. “I meant to do that!” She called to her boyfriend as Marabelle left Matt in the dust. “I’ll circle around and meet you back at the stables, okay!?”
The mare sprinted away from Julie’s boyfriend for a full minute before returning to a more relaxed pace. The girl on top her never saw a riding horse act like that before. Maybe Matt just spooked her somehow? Maybe it would be best if they both took it easy for a little while before turning back the stables.
“Aww… did Matt startle you? He’s such a party-pooper!” Julie giggled, running her fingers through Marabelle’s blonde mane as she stroked along the contours of the horse’s gorgeous neck. She’d been riding at this ranch for over a year now, and whenever she could, she asked to ride Marabelle – and she could have sworn Marabelle always asked to be ridden! There was just something about the white and brown furred paint mare that made her cozy to ride without a saddle. Maybe it was gentle and obedient demeanor. Maybe it was her cozy, broad back – every inch of her thick equine hide laced with just enough mare fat to make her an extra soft ride. Who knows? All that the sixteen-year-old girl cared about now was a long afternoon with her favorite horse. “He’s such a cry baby.” Julie smirked, “Boys and their balls! It couldn’t have hurt that ba-“
Julie jolted up atop Marabelle as she felt something pierce her jeans and sting her right on the rear. It felt like a bee sting for a moment, but then it instantly dissipated, leaving nothing but the sensation of warm numbness sweeping across her bottom. Little did Julie know that Cupid had seen her fondness for the horse she was riding. Soon that pinprick sized arrow feeding it’s love-magic into her rear would make her appreciate Marabelle even more.
“It’s okay… we don’t need Matt to have fun...” Julie sighed, kicking against the mare’s barreled belly to get her slowly sauntering forward. The scenery along the forest was gorgeous – even more so than usual. Small peep-holes of sunlight danced through the canopy, illuminating the forest floor with speckles of brightness. Colorful wildflowers in full bloom dotted the green landscape with splotches of reds and yellows. The painting-like countryside mixed in with the warm, freshness of summer was normally enough to dazzle her, but there was a nagging soreness starting to develop underneath her – a hot sensitive pain right where her crotch met Marabelle’s back.
“Stop, girl.” Julie ordered the mare with a tug of the reins. Just sitting on Marabelle was starting to hurt… but it was a different kind of pain than what she’d felt before. It somehow seemed like she was sitting on a pair of tiny waterballoons, but the balloons were apart of her and she could feel the pressure of those orbs start to squeeze down against the mare’s back. Julie groaned as she hugged around Marabelle’s neck, smooshing her face against the mare’s mane as she shifted forward, laying her belly flesh with the horse’s back. That helped, but it still hurt a bit… the pain starting to radiate stronger and stronger as those waterballoons started to press against her skintight jeans.
“Ugh… it hurts… gotta get off…” Julie grumbled against the mare’s neck. The sixteen-year-old tried to lift her butt upwards so that her groin wasn’t touching Marabelle’s back anymore, but soon she’d find a new problem.
Marabelle’s scent. With Julie’s face shoved against the mare’s mane she couldn’t smell anything but horse. Normally Marabelle’s smell was the girl’s least favorite thing about the mare, but somehow that barnyard stink and oily equine sweat that clung to the horse’s hide started to smell… okay. Better than okay even. Hidden under that slight tinge of barnyard stink was a savory-smelling femininity… a hot-scented feminine perfume that just oozed warmth and comfort. Marabelle’s aroma made Julie’s mouth start to water, so much so, that she couldn’t help but…
“Mmphf-…” Julie grunted as her teeth sunk into the thick horse hide at the base of the mare’s neck. The girl hadn’t the faintest clue why she did that, but the little love bite felt right; like a kiss but for horses.
“Oh! S-sorry, girl!” Julie stuttered as she realized what she was doing, terribly afraid that she might have hurt the mare. She waited for some sort of reaction from the horse below her, but Julie couldn’t have imagined what her horse did next. Marabelle froze in place and snorted, the horse’s stance widening as she spread her hindlegs apart and lifted her rear a little more in the air.
Did she… actually like it…?
As the horse adjusted her stance, Julie’s crotch fell backwards onto the mare’s back, those hot water balloons between her legs now swollen to the size of juicy apples. Marabelle’s change in posture forced Julie’s mouth right back against the mare’s neck, the girl’s teeth sinking back into that savory mare flesh as she renewed her love bite. Without even thinking, she began to grind against the horse’s back as her body started to feel ridiculously hot. Her teeth began to grow bigger, calcium and enamel piling up in each tooth as they fattened up into blocky herbivore chompers – all the better to nibble on the mare’s neck with.
“Hah… huh…?” Julie gasped with her mouth filled with the mare’s hide as she felt the off sensation of her mouth beginning to press outward to fit more of those slab-like teeth. Her petite nose flared out, growing wider as she pressed it against the mare’s neck, huffing in the horse’s scent like a drug. The reassuring smell from Marabelle had numbed Julie’s sense of pain, her face crackling and shifting outward into muzzle, the girl’s cheeks blanketed in piebald fuzz as her ears stretched out into furry points.
“Need to… get off…” Julie mumbled against Marabelle’s mane, growing worried at the painless sensation of her flesh shifting into something distinctly inhuman. She wanted off… but she just couldn’t pull her away from the sultry scent of mare lust blanketing her nostrils.
With her new ears, Julie could hear Marabelle nicker encouragingly to her. She felt the cadence of the mare’s heart throb against her own as the barrier between human and beast began to melt apart, splitting Julie’s mind between sixteen-year-old girl and a young virile horse. “Get ahold of yourself! Think of your family, your future, your boyfriend!” Julie’s human brain screamed as it urged her to run far away. But thoughts of losing a future with Matt were the least of her worries, the feeling of the mare’s back grinding against Julie’s newest addition was making her shiver in fright.
A mottled pink trouser snake began peaking out from underneath Julie’s T-shirt as the girl’s belly rubbed against the mare’s back. There wasn’t anything vaguely human about that new cock sprouting from her groin. The flesh felt thick and rubber-like, bloating out in both length and girth as it got smooshed between Marabelle’s fur and Julie’s ever bloating belly. Blood rushed from her brain to her erection as her new animalistic penis became the epicenter of the changing girl’s world, every other thought drifting away until the intrusive image of Marabelle’s winking horse sex was impossible to whisk away!
“Mara…belle… what are you doing to me…?” Julie whimpered and snorted as she held her love bite against Marabelle’s neck. Her mouth extruded outward into a long muzzle as the rest of her teeth changed into molars, ensuring she’d only be able to chomp on grass the rest of her life. Her fit, girly stomach had bloated out into an over-sized beer belly. Her expanding intestines forced her trim waistline and butt to plumpen up as her innards changed to better digest cellulose. Pounds piled onto her, her breasts melting and dissolving inside a cage of bloated horse fat and muscle, her pristine girlish skin stretching thin to accommodate her body as it changed into an equine shape.
The feeling of her very being shifting into something inhuman would have broken Julie had it not been for the constant stream of mare pheromones seeping into her nostrils like an IV drip. As much as she hated it, the alien and painful sensations wracking her body were laced with a tinge of pleasure beyond anything she’d felt before. She knew the mare below her wanted his for her… and it felt shamefully good to turn into the stud Marabelle wanted her to be.
Extra vertebrae calcified along her spine, forcing her to stretch out and grow absurdly large. Her neck flexed outward to several feet in length as her piebald horse fur erupted down it. Her terse whines developed into whickers as her balls slid off the curvature of Marabelle’s butt, finally letting those coconut-sized testicles hang free and bob against the mare’s lush flanks. As Julie became too big rest her weight on Marabelle’s back, her arms and legs evolved into horse’s. Black keratin flowed over the changing girl’s hands like molten magma, forcing her middle fingers and toes to bloat out to form giant onyx hooves. Tendons and muscle wrapped along her extending bones as her new hindlegs finally planted themselves firmly in the dirt behind the mare, leaving her mounted a top Marabelle’s back.
At this point, little remained of the old Julie aside from the shredded remains of her T-shirt and socks still stubbornly holding onto her new body. Her well-kempt skin was already soaking in lathery stallion flesh, growing thicker and furrier as her new coat covered every last inch of her. Julie bugled out a muffled, pained whinny against the mare’s neck as a long blonde tail exploded out of her rear, flecks of blood drooling down the muscular contours of her butt as the new tail teased the rim of her bloated horse anus.
Julie’s simple animal mind didn’t give her a moment to contemplate her new lot in life as her new bestial body completed itself. That throbbing two-foot-long stallion python hanging below her legs was already mashing against Marabelle’s marehood, her cock already dripping wet with the mare’s honey as it winked against her erection. Her new equine muscles shifted “on”, steamy sweat beginning to seep off her loins as that bulbous horse glans plunged into Marabelle’s quivering folds. Those plump veils of pillowy soft mare leather hugged tightly around Julie’s maleness as the inexperienced stallion instantly came from the sensation of her gigantic cock embraced from all sides by molten-hot, squishy mare innards. Julie, enraptured by her first bestial orgasm, worked as hard as she could to slam her penis in as deep as it could go even as her cock was already drooling out a deluge of steaming-hot foal batter into his mate. Sloppy “plaps” echoed through the tranquil forest as a thick glaze of gooey stallion cum painted the mare’s rear, eliciting a loud, wet “slap” every time her giant scrotum spanked Marabelle’s ass.
As Julie’s very soul was twisted and corrupted into an animal’s by the carnal relationship with her beloved mare, Marabelle proudly held her stance, letting her former rider “ride” her properly for the very first time. The new stallion’s eyes had clenched tight as she pumped the last few spurts of virile jizz into the horse below her, the coital bliss beginning to erode into a realization into what had just happened to her. Julie’s love bite finally abaited as the huge stallion slid off the mare’s back, shakily standing on all fours for the first time as her penis retracted back into his sheath. Julie arched her long neck back to look at herself, trembling as she confirmed her worst fears. The girl that was just there was gone. Now she was nothing but an American Paint stallion! An animal!
A shrill whinny shrieked from her lungs as she began to feel light-headed, teetering back and forth on unsure legs. She had her whole life ahead of her as a human girl, but now she was completely indistinguishable from common livestock! No one would believe what had happened to her. She’d be treated like a horse, forced to eat hay and give pony rides until the day she died! Her life was over! She might as well be dead and-
Marabelle suddenly backed her cum-drenched rear right into Julie’s face as that potent mixture of stallion jizz and mare sex enraptured her male mind once again. “N-no!” Marabelle’s panicking mind screamed in her head to the horse. “You did this to me in the first place! Bad girl, Marabelle! Bad g-girl…”
Julie’s long drooly tongue flicked out on its own, sinking into those lush folds of horse pussy. That drug-like mare musk was numbing her mind once again, those worries about her sudden change into a stallion drifting off into animal bliss. Her mind was being rewired once again, and Julie knew it. Memories of childhood evaporated into false recollections of being a foal. Years of schooling were deleted, replaced with the knowledge of navigating nearby trails as well as the experience of being ridden. As bad as being ridden seemed to her at first, her new memories made her start to crave it. As much as she hated it, her mind was starting to tell her how good it felt to be treated like an animal… how good it felt to act like one.
Julie’s continued to tongue Marabelle’s drooling wet slit as the mare nickered to her encouragingly. She wanted to stop… but everything but that bit of humanity imprisoned in the back of her mind made her want this even more. Whether she wanted it or not… she was a horse now.
Suddenly, a panting Matt made it into a clearing holding a saddle. Spotting Marabelle, he figured he’d found Julie too, but strangely, the only other one that was there was a strange new horse.
“Julie? Where are you?” Matt called out as he approached the two horses in the meadow. “I ran back to the stable and they gave me a saddle so I don’t break my balls! They said you’d know how to put it on! Where are you?”
Julie withdrew her tongue from Marabelle’s marehood before Matt caught sight of what they were doing. Her big prey animal eyes watered as she trotted towards Matt, neighing wildly as she tried to communicate that this was her. “Matt!” She whinnied, “It’s me! Your girlfriend! You still know it’s me, right? Please… take me to the hospital or something… I need help… I need…”
“Whoa, boy.” Matt backed away, “Calm down, where did you even come from?”
Julie backed off too, eyes wide in panic as she realized not even her boyfriend knew it was her. She tried to stand still to keep from scaring him away because the last thing she needed him to do was to run. She just needed him close to her right now… if she could keep him with her, maybe he’d eventually understand it was her… but how?
As Julie the stallion and her boyfriend starred at each other in this strange standoff, Julie began to feel herself kneel down without even knowing she was doing it. Her head perked up as her belly hit the ground, the new horse realizing her body was answering her question all on its own… it wanted to be ridden.
If Julie could, she would blush. For some stupid reason, all her horse mind could see when she looked at Matt now was a human to ride, pet, and feed her. Just the thought of having Matt on top of her made her cock begin to peak out of its sheath. Why was the idea of being ridden so arousing to her?
Julie shot a pleading glance to Matt. Her human mind hoped that he’d see her as his girlfriend while her stallion mind wanted him to see her as nothing more than an animal that was bred to be ridden. At least… no matter what happened, she’d be close to him.
Above the two of them, Cupid sat looking down at the pair from a nearby tree. He was surprised that Julie seemed interested in the human boy even after she’d been changed into a stallion. Well, maybe it was because young love was hard to break that she still seemed interested in him? Or maybe it was because horses have herds after all… maybe the new stallion just wanted another mate for his herd? Maybe Cupid had a little more work to do here to help the new horse out.
“Please…” Julie begged with another unintelligible whicker to Matt. “Bareback. I’ll be gentle. Ride me bareback…”