A Fashion Emergency

by Rimmer

Rating: mature
Tags: My Little Pony: Friendship is Magic, Rarity, Porn, Sex, Fetish, Sweetie Belle
Length: 5968

While running late for a fashion show, Sweetie Belle desperately needs to use the restroom. Without any other choice, Rarity finds herself needing to help out her sister in a rather unusual way.

Rarity has selected her younger sister Sweetie Belle as her model for an upcoming fashion show. But when the big day comes, the two of them find themselves running late with Sweetie Belle in desperate need of a restroom. Without any other choice, Rarity finds herself needing to help out her sister in an… unusual way.

TRIGGERS: Foalcon, Scat, Voyeurism, Sisterly Incest, Messy Masturbation, Being Filmed, and being extremely horny in a public setting.

This story is a commission for: wolfen216
Information about my commissions can be found on my profile page.

Published 2023-02-19 15:50:01 UTC
Last updated 2023-02-19 15:50:01 UTC

A Fashion Emergency

“Rarity!” Sweetie Belle groaned. “How much longer is this gonna’ take?”

The elder unicorn squinted through her glasses at her sister as a flurry of fabric swirled around them, held aloft by her bright blue magic. “Hopefully not much longer, dear, the carriage is waiting outside,” she replied as she placed the finishing touches on the intricate dress.

It actually did, in fact, take much longer, and by the time the two unicorns were trotting out of the door, they were already running late. They clambered into the waiting carriage with as much grace as time permitted, and Rarity ushered the driver to gallop to the event posthaste. Soon, the carriage was rattling along the cobblestone streets of Ponyville towards the fashion show on the outskirts of Canterlot.

Only then did Rarity allow herself to relax into her seat. It seemed to take forever to get there, and she briefly pondered the efficiency of taking a carriage rather than a train. Or even perhaps Twilight could spare one of her pegasus carriages. But even with the long journey, they eventually found themselves in a long queue of other carriages waiting to deliver their passengers to the event.

This was the reason that Rarity had wanted to be on time. Leaving earlier meant that one wouldn’t have to wait in this line that seemingly stretched on forever and moved slower than a snail. Hay, it would take almost just as long as it took to get here just to reach the red carpet.

But even the long wait ahead of them couldn’t dampen the growing excitement of yet another fashion show. It had been so long (a couple months at least) since the last one, and this year was special. This year, her own little sister was modeling for her. It truly was a time for excitement.

However, that excitement was quickly shattered by her sister’s voice.

“Uhm, sis?” Sweetie Belle suddenly spoke up from beside her. “I gotta use the bathroom.”

Rarity looked over at her sister, the telltale signs of panic stretched across her face. “Why didn’t you go before we left?”

The younger unicorn shifted in her seat uncomfortably. “You took five hours to put this on me,” she complained. “I didn’t really have a chance to sneak away.”

With a huff, Rarity pushed aside the curtain blocking the carriage window and peered outside. They had already made it to the event procession, but being late, they were a fair bit towards the back of the line, and there was undoubtedly a considerable wait ahead of them before Sweetie could make it to any sort of little filly's room. Additionally, they were flanked on either side by ponies waiting for their own entry, photographers, critics and fashionista’s alike, so - as crass of a concept it was - Sweetie Belle could not just hop out of the carriage and head into the forest for her relief.

“How bad do you need to go?” Rarity asked as she desperately thought for an alternative solution.

“Pretty bad,” Sweetie replied anxiously as she shifted in her seat again.

There was really only one solution to the current predicament, as much as it disgusted Rarity to even consider. Without the ability for her younger sister to leave the carriage, and with a restroom being a great distance away, Rarity could see no other option than for Sweetie Belle to go right here, inside the carriage.

Steeling herself, Rarity asked, “What, uhm… do you need to do?”

“I have to poo,” muttered Sweetie, embarrassed.

Rarity grimaced, although she was in part relieved. Pony poop, given that it was solid, would be far easier to clean up than a puddle of urine soaking into the upholstery of the carriage. She took one, last furtive glance out of the carriage window before letting out a long sigh.

“Alright,” the white unicorn said softly. “Let’s get this over with.”

Sweetie looked over at her sister in confusion. “Get what over with?” she asked.

Rarity sat down on her haunches, right in the center of the carriage. “You need to poop,” she said bluntly. “And I’m going to help you.”

Her sister blushed at the offering, and did not move. “W-what?” she asked. “Why?”

With a roll of her eyes, Rarity beckoned Sweetie over to her. “Why?” she echoed. “Because what we’re not going to do is ruin that beautiful dress,” she explained, pausing before adding, “And also you’re my sister, and I don’t want you to be so… uncomfortable.”

Sweetie Belle hesitated, but only for a moment before the pressing need pushing at her rectum once again made itself known. She shuffled off of her own seat, trying her best not to ruffle the opulent dress too much as she positioned herself in front of her older sister.

They stared at each other for a moment, Rarity in waiting and Sweetie with an air of distinct awkwardness before Rarity finally broke the silence with an exasperated sigh. “Sweetie, turn around, please. We really don’t have much time.”

Finally succumbing to the sense of urgency - both from the time and from her own desperation - Sweetie Belle followed Rarity’s orders and turned herself around so that her rear, and thus the large back of the dress, were facing her sister. A fart snuck its way out of her butt at her increased movement, and she blushed at the embarrassing sound. “Sorry,” she muttered.

“It’s quite alright,” Rarity replied, a blush tinting her own face as the faint smell of feces drifted across her nose. She hated how not unpleasant her sister’s anal air smelled, and quickly tried to shake the thought from her mind. With a flash of her horn, she quickly gathered the large bundle of fabric in front of her and gently lifted it up so as to not disturb it too much. It also took the painstaking masterpiece out of the way of Sweetie’s impending bowel movement, which was perhaps more important.

As her younger sister’s pale, white rear and dull purple tail were revealed, Rarity reminded herself that this was no place for unwanted feelings of attraction. She was here to help, and to help only.

“Alright, are you ready?” Rarity asked, hating how dry her mouth was.

Sweetie Belle nodded instead of verbally replying, and Rarity’s eyes darted back down to the tight, puckered tailhole as it began to flex and twitch in time with the filly’s straining. The older unicorn couldn’t help but watch with rapt, aroused fascination at the cute winking star, and she struggled to fight her growing anticipation at what was about to unfold before her.

Scat, although a topic she treated with outward disgust, was a particularly taboo indulgence of hers. While she did not often find the opportunity to participate in any such actions, aside from her own bowel movements, watching other ponies defecate lit a fire in her loins that was unmatched by most other turn-ons. She’d never admit this to anypony, of course - she could barely admit it to herself. But it was getting harder to deny what she was feeling as she gazed upon her sister’s flexing butthole.

Despite knowing what was coming, another louder, sputtering fart that slipped out of Sweetie’s puckered anus caused Rarity to involuntarily flinch. The fetid air of filly flatulence blew out harshly against the floor of the carriage as the white ponut twitched. Due to the urgency, it did not take much effort for the wrinkled star to gently split open to reveal the source of the filly’s discomfort. The large head of a firm, brown ball of shit slowly pushed downward, only getting wider and wider as the unicorn pushed.

Sweetie groaned as her ass stretched around the large clump of shit. Her wrinkled star strained around the turd as she struggled to push it out. It was huge, and she had to pause to take a deep breath before she started to push some more.

Finally, after what felt like forever, the massive fecal ball finally hit its widest point, and the rest of the poop slid out rapidly through the gaped ring of muscle. It fell to the floor of the carriage with an embarrassingly heavy thud, the soft bottom flattening out against the hard floor.

Rarity’s eyes widened at the size of the horseapple along with the sizable gape it left in her younger sister's asshole. Her cheeks were flushed a deep red at witnessing this normally private act so close and intimately, and the unicorn was forced to swallow a bubbling feeling of arousal that was rising in her throat. “That’s your sister,” Rarity reminded herself silently. “And she is quite literally defecating on the floor of an expensive carriage. It’s not hot. It’s not hot.”

Unfortunately for Rarity’s growing horniness, Sweetie Belle was not done relieving herself just yet. The openness of her ass allowed for the rest of her stored scat to slide out on top of the initial, large dropping easily, and the young filly let out a moan of pleasurable relief as the pile of manure beneath her grew.

A dribble of urine escaped her flushed pussy lips as she strained, the few stray drops soaking into the carpeted floor of the carriage. Rarity held her breath, waiting for the telltale splattering of piss to start, but thankfully, that little drip was all that came out. The same could not be said for her ass however, as her anus opened up with another grunt from Sweetie, and the head of a final turd poked its way through her stretched tailhole.

It slithered out, slightly longer than the others that had come before it. The log dipped down to drape across the fresh pile of manure, tapering off as it slid out of her ponut with a few pop of gas. It dropped out with little ceremony, and was followed by one, last long fart that only increased the fetid smell of horseshit that had already filled the small carriage.

Sweetie Belle let out a long sigh at the feeling of having her bloated bowels finally empty, and her body relaxed from the stressed posture she had taken to squeeze her crap out. Rarity’s magic caught her before she fully sat down on top of her pile of shit though, much to her relief.

“Are… are you all done?” Rarity asked hoarsely.

Unable to answer, both from the relief she felt along with embarrassment, Sweetie simply nodded instead, and Rarity gently nudged her forward, away from the mound of filly droppings. She stole one last, longing glance at her sister’s pert little pucker, relishing the new greasy film that had gotten caught in the tight, wrinkled folds. Then, she gently lowered the dress back down to cover her back up, and made sure it didn’t accidentally fall into the smelly pile of waste that now lay between them.

Neither of them had noticed that the carriage had come to a stop, and the sudden knock at the carriage door startled them both. “Horseapples!” Rarity swore, and Sweetie Belle couldn’t seem to contain her nervous giggle at the choice of curse. “Okay, you go out there, I’m going to have to stay here and clean up this mess,” the unicorn whispered in an urgent tone.

“You’re not coming with me?” Sweetie asked.

Rarity shook her head. “No, I have to… well I have to do something about this,” she said as she gestured towards the filly’s pile of waste. “And besides, even if I did come with you now, you’d only be whisked away to get ready to the runway anyhow.” A second knock rapped at the door. “So, go.”

Gathering her dress up in her hooves, Sweetie Belle went over to the door and opened it with her magic. Rarity quickly stepped forward after her, both to see her out and hide the smelly mess from the views of anypony outside. The fresh air hitting her nose, however, made her realize just how rank it actually was inside of the carriage, and she quickly shut the door after her sister so as to not let any of the foul fumes out into the waiting crowd. The carriage shifted underneath her hooves, and Rarity let out a sigh as it began its journey towards the parking area.

Now, all that was left to do was to figure out how to clean up this mess. Her eyes darted around the cramped interior as she worked the problem over in her mind. There really wasn’t anything to clean it up with in here. Rarity supposed she could just use her magic, but it wasn’t powerful or skillful enough to simply vanish the mess out of existence, unlike Twilight’s. The only real option she had was to carry it out. But how would she hide it from view? And where would she put it?

A dribble of arousal dripping down her leg suddenly reminded Rarity of an additional, unfortunate problem. She was immensely turned on right now. The act of watching her cute little sister in such an intimate and private situation - practically putting on a personal show for her - the situation certainly stirred something down between her hind legs.

The unicorn could use magic to hide her arousal, of course. It was nothing new. Proper etiquette demanded as such quite often during heats and events and such. It was quite a simple spell, a simple trick of magical misdirection that would ensure nopony noticed, or even smelled her arousal.

Rarity paused as a solution suddenly formed in her mind. It was gross, foul, and horribly kinky, but it was a solution. She weighed the options in her mind, before finally just deciding to go through with it. If she could hide the arousal in her loins, there was no reason why she couldn’t hide other things in here as well.

The unicorn took a deep breath as she steeled herself for what she was about to do, and took a step forward. Her body hovered over the large pile of waste, and she could feel the heat of the fresh scat drift up beneath her. She lined herself up with precision, squatting down slightly before lighting her horn and taking hold of her pussy lips to gently spread them open as wide as they could go.

It was embarrassing how much of her own fluids dripped down onto the waiting pile of warm shit as she hovered her crotch over it. Equally embarrassing was just how enticing the idea of sitting down on top of that pile and letting the filth coat her insides sounded to her right now. But Rarity supposed it was better than being disgusted by the idea. After all, it was what she was about to do.

Without any further hesitation, Rarity lowered herself onto the pile of shit. “O-ooh… my…” Rarity let out a stuttering gasp as the warm filth pressed into her folds. She paused, briefly overwhelmed by the strange sensation. But it didn’t take very long for her to crave more.

The unicorn pushed down harder and spread her pussy wider to let in as much poop as she could into her wet cave. She bit her lip and held back a desperate moan as the greasy clumps of feces squished to fit inside of her. Her clitoris winked out against the pile, adding an additional layer of stimulation to the naughty act, and Rarity lifted a hoof to bite down on as she involuntarily ground down against Sweetie’s manure.

It was embarrassing just how out of control she was. Her horniness almost forced her to fully lean into the mess and just smear it all over her crotch, but the unicorn managed to hold herself back to just gently grinding down against the softening pile. She had an event to attend after this, and the concealment spell could only conceal so much.

Rarity could feel the carriage turning into the waiting area, and knowing that she would need to leave soon, she forced herself to stop grinding down on her sister’s scat. Her magic reached out to scoop whole chunks of it and press it gently into her gaping pussy, pushing it in as far as she could to stuff it all in there. She was worried that there wouldn’t be enough room inside her (she was pleasurably tight, after all). But thankfully, pony poop seemed to be a forgiving sculpting medium and with some force, she was able to squeeze all of it up in there with only minimal struggling.

The last horseapple was pushed into her full cunt just as the carriage rolled to a gentle stop. Rarity quickly straightened back up, panicking as that last turd slipped back out and nearly fell to the floor before she caught it in her magic and stuffed it back inside of her. Then, she took a deep breath, concentrated, and cast her concealment spell.

A bright blue shine flashed across her pussy, and she felt the telltale warm tingle of magic working its way over her backside. Gradually, the brown mess that had become of her pussy transitioned into a dry, yet appealing set of white labia that showed no signs of arousal nor scat. Rarity took one last moment to steady her breath before she opened the door to the carriage and stepped down onto the gravel surface of the lot.

Her steps were careful, the feeling of the mess inside of her forcing her to walk stiffly. None of it could leak out - her spell did not extend past the edge of her vagina, and the illusion would be ruined otherwise. She left the door to the carriage open slightly to let it air out upon their return. She flashed a nervous smile to the earth pony who had been pulling the carriage before she walked away as quickly as she dared, making a beeline for the restrooms. But just as they came into view, she heard the announcer in the other room call out that the show was about to start.

Rarity froze, her head darting between the bathroom and the showroom. She really needed to get this literal shit out of her, but she also refused to miss Sweetie Belle’s major fashion show debut. She trotted in place as she desperately tried to make a decision, and leaned towards the bathroom… but her sister eventually won out. Rarity rushed into the grand hall and trotted as fast as she possibly could towards her reserved front-row seat.

The fashion show, although mesmerizing as always, was torturous. As much as Rarity tried to enjoy the work, the feeling of poop mashing together in her cunt with each and every shift of her body was incredibly distracting. Each step moved the mess inside of her and sent tingling sparks of arousal down her spine. She had to concentrate in order to keep her tail at a modest posture, rather than flagging it up to display her bits, although concealed, to everypony around.

It was stressful, and naughty, and Rarity just wanted it to be over. Yet when Sweetie Belle came bounding back over to her from backstage full of giddy excitement she couldn’t help but feel that same excitement for her.

And so she was forced to mingle for a while longer, indulging in some food and drink that was offered and chatting with some colleagues she hadn’t seen in a while. Sweetie was having a blast, completely oblivious to her sister’s predicament.

There were a few close calls throughout the evening, either where Rarity could feel the greasy mess about to slip of out her and splat on the ornate floor behind her - a sight that would not only be the most embarrassingly uncouth thing she had ever experienced, but also likely to ban her from the high-fashion world forever - or where the pleasure had gotten so great she had come close to cumming right in the middle of a conversation. One poor mare had definitely noticed her eyes rolling back as she struggled to reign it in, and another unfortunate stallion waiter had nearly dropped a tray due to an aggressive flick of her tail.

But, despite the painstaking slow pace of socialization, the night slowly came to an end, and Rarity was one step closer to freedom and relief.

“That was so cool,” Sweetie Belle exclaimed. “Everypony was looking at me! They all looked so impressed!”

Rarity smiled as cordially as she could as they stepped outside. “Yes they were,” she agreed, fighting to keep her voice steady. “What a wonderful event!”

“Are we going to do another one?!”

“Perhaps eventually,” Rarity said, happy that her sister was excited, but desperate to get out of there as soon as possible. Thankfully, the carriages were already arriving to take everypony home.

When the carriage returned to pick the two of them up, Rarity was relieved to discover that most of the foul stench had been able to filter out, leaving only the faintest trace of fecal fumes. The unicorn wasn’t quite sure that she would be able to contain herself for the entire ride back if she was forced to endure the delightfully disgusting aroma of her sister’s scat.

They settled in, and as the driver took off, Rarity did her best to sit rigidly still throughout the ride back, so as to not continually jostle the load inside of her. Yet every bump and turn of the carriage sent electric jolts of pleasure up her spine as her soaked nethers brushed this way and that across the upholstery. She tried to disguise her pleasured whimpers as coughs or grunts, but with the way Sweetie Belle kept glancing at her in confusion revealed that she wasn’t doing the best job at concealing the current state that she was in.

But, thank Celestia, the fates were merciful, and the ride home was much shorter than the ride there. Or at the very least, it felt that way. Soon, they were home and Rarity was following an ecstatic Sweetie Belle up to her bedroom to assist her.

Helping Sweetie Belle out of her dress was agonizing. Rarity’s magic trembled as the silky fabric slid over her sister’s curves, baring more and more of her marshmallow coat as it was pulled away. And as it revealed the younger unicorn’s plot, Rarity held in a moan as she saw that the tight, wrinkled star still retained a thin film of brown residue from the incident earlier that day. She longed to lean into it and embrace its filthy muskiness - to inhale the fetid stench of her own sister’s shitty asshole.

But she wasn’t allowed to indulge in that fantasy for too long. “Phew!” Sweetie said as she wiped her brow with a hoof. “Thank goodness that’s finally off. I feel all sweaty and gross!” She turned around, hiding her deliciously dirty rear from Rarity’s gaze. “I’m gonna go take a shower now, ‘kay sis?”

Doing her best to pull herself out of the lustful trance, Rarity nodded with a forced smile. “Of course, Sweetie, you did great today,” she said. Her situation quickly caught up with her, and she realized that she would need to… take care of herself somehow. “Wait, uh…” she trailed off. The most logical choice was to simply dispose of it in the bathroom. But the feeling of the soft waste smearing up around inside of her, and what that was doing to her, made her reconsider the most obvious option. Perhaps there was a more pleasant way to dispose of it?

“Yeah, sis?” Sweetie asked, waiting for her to continue.

“Take uhm… take as long in there as you need!” Rarity said with a warmer smile. She hoped that her suggestion was subtle enough, and of course that she would take it. Thankfully, Sweetie Belle just nodded and bounded away, seemingly unaware of the state her older sister was in.

As she heard the door to the bathroom close, Rarity finally allowed her body to relax. “Holy fuck,” she whispered to herself, not even realizing the profanity she let slip out of her mouth. Her horn sparked with her signature, blue magic as she pushed the door to her bedroom closed, not even waiting to make sure it shut before she collapsed backwards onto her bed. Another flash of her horn dissipated the concealment spell she used to hide her current state, and almost immediately, the bedroom was flooded with a wave of her own musky arousal mixed with the stewing leftovers of Sweetie’s shit.

Rarity’s gaze caught sight of herself in the mirror across the room, and she moaned as she caught sight of the absolute mess that was her pussy. Her normally pristine, white lips were smeared with brown, a combination of the softening filly scat in her snatch mixing with the drooling trails of her own mare nectar. The sight was dreadfully arousing, and Rarity wished she could get a closer look. But… perhaps she could.

A wonderfully kinky thought crossed Rarity’s mind, and she hastily jumped from the bed to head over to her closet. She had, over her years, acquired a vast number of trinkets to aid in her craft, one of which being a profoundly expensive camera. Although a few years old at this point, it was still ahead of its time in terms of what it could do, one of those things being able to capture a live recording of her finest fashion shows.

Or in this case… record the naughty events that were about to transpire.

She set up the tripod so that the camera faced her bed head-on, making sure that it would get an excellent view of her filthy acts. It was a bit finicky, but Rarity did it as fast as she could, more than eager to get to the actual action. She double checked to make sure everything was all set up, before she finally pressed down the record button and trotted back into the camera’s line of sight.

“Someone’s been a very n-naughty mare,” she whispered sultrily, her voice trembling with excitement. She had never done anything like this before, but the idea of viewing it later, or perhaps even somepony else viewing it, was very nearly driving her mad.

Taking hold of this newfound delight in showing off, Rarity turned around to flip her tail up, revealing her messy, shit-filled pussy to the camera. The unicorn swayed her ass in a silent taunt, as if beckoning the viewer to come closer as she took slow, shaking steps back towards her bed. When she reached it, she lifted her forelegs up onto it and then leaned forward, arching her back in a way that she knew would spread her flanks perfectly to present her rear in all of its glory. Her tail flipped up and over her back to fully bare herself to the camera, and her glistening, shitty slit and pert, darker pucker reflected in the glassy lens of the camera as she glanced over her shoulder.

“Oh my…” she hummed. “Look at that mess!”

Thinking back, she flexed her ass a few times, wondering if she, herself, had anything to “contribute” to the mess. But all she could force out was a sputtering dry fart that barely added to the already foul rank that filled her spacious bedroom. That was fine, however - she still had plenty of her sister’s waste to play with.

With a lustful groan, Rarity climbed up onto the bed proper and rolled over. She kept her hind legs together and lifted them up into the air as her tail splayed out across the sheets. Then, at a tantalizingly slow pace, she spread them out in a wide v-shape, fully exposing her body to the camera. This angle put not just her pussy and anus on display, but also showed off her large, round teats nestled just below her belly. She reached down to squeeze them together playfully as she gazed sultrily at the camera, before reaching down even further to finally get the show started.

Rarity moaned as her hoof dipped down to grace her needy slit. The tip brushed along her dirty vulva, coating it in a fine film of her own juices before it poked down to slip inside the gaping cavity that was her cunt. The mass of her sister’s scat easily gave way under the minimal amount of pressure she applied, softened by marinating for so long in her moist love cave. It was still warm as well, her own body heat keeping the pony poop at a delightful temperature for the hours it had sat within her.

The small pants and moans quickly rose in volume as Rarity played with herself. Thick, brown paste smeared onto her hoof as she dragged it through the filth, coating it in the vile sludge as she slowly began to masturbate herself. She was making an even bigger mess between her legs than she already had, but she didn’t care. Instead, she simply gave a steaming, sultry gaze to the reflective lens of the camera watching her as she smeared her sister’s scat all over her soaking wet slit.

Copious amounts of mare juice soaked into her sheets as her pussy gushed between her legs. Rarity hadn’t even cum yet, all of this nectar was simply from the stored arousal she had fought through for the entire afternoon. Her hoof brushed against her clit, sending another nearly overwhelming wave of pleasure through her body and even more fluids to drool out from her quivering cunt.

She continued to drag her hoof upwards, up and around the soft mounds of her large, white crotchtits, brushing against her sensitive nipples as she went. A deep, brown trail of filth followed wherever her hoof went, a smelly path of smeared scat sullying the pristine white hue of her coat. It traveled even further up her body, stretching across her breast as it made her way up to her muzzle, and hovered right in front of the unicorn’s face.

And then Rarity inhaled deeply. The rich, fetid aroma of Sweetie Belle’s shit burned its way into her nose, and she let out a long, low moan as her body writhed in pleasure. Her pussy clenched around the mushy mass inside of her, and she decided that it was probably time to get that mess out of her. She squeezed her inner walls and began to try and force the stored slop to slowly slide out of her gaping cunt. The sludge moved slowly, pushing out of her and smearing out onto the formerly white sheets beneath her.

It was an odd feeling, pooping out of her pussy. There were different muscles that she was pushing on - straining in different ways to squeeze it all out. The thick, knobby consistency of the lumpy horseapples had softened a lot, which made the process slightly easier. Her pussy spread around the greasy mess as she rebirthed it out onto her sheets. It had merged into a semi-solid conglomerate, moistened by her own lubrication, and it fell apart in wet clumps that smeared out onto the bed as it left her gaping cooze.

Her free, clean hoof continued to squeeze around one of her boobs, applying pleasurable pressure to her firm nipples as her pussy emptied. Her other hoof remained pressed against her nose as she kept huffing the earthy and bitter aroma of the marinated shit. Rarity relished in the absolute filth she had gotten herself into. It was so contrary to her persona, so taboo, and yet here she was, fully indulging in it and recording it no less. She couldn’t hold back any longer, and took a deep breath of her sister’s scat as she reached down to frantically rub at her messy slit.

Wet shit smeared all over her crotch as she eagerly masturbated. Her hoof scooped out entire clumps of the warm manure as she strained to push out of her cunt. The rubbing and smearing broke it apart against her flushed pussy lips and the sheets in a smelly, thick mess. Desperate moans tore their way out of her throat as her back arched and she angled her crotch into her hoof, seeking any and all pleasure that it could provide.

Rarity was rocketing towards one of the most powerful orgasms of her life. Wet squelches filled the room as she rubbed faster and faster, desperate to reach that precipice. Her velvety walls began to contract as her orgasm overtook her, squeezing clumps of her sister’s shit out of her pussy as she slipped right over the edge.

A long, low moan echoed in the room as she came. The last lump of poop was forced out of her, gaining air and sailing directly at the camera. It impacted with a dull thwack, smearing its filth across the lens and knocking it over to the floor. A pressurized jet of mare cum immediately followed, splattering out in front of Rarity in a wide, wet arc and soaking into the sheets. The hoof on her pussy stopped rubbing and simply held the quivering slit open as she continued squirting, a few more gushes of silky, clear pussy juice spraying out over the mess she had made, and even out onto the floor in front of her bed.

Her entire body shuddered as she slowly came down from her orgasmic high, deep, panting breaths raking her lungs as her heart rate gradually steadied. The dirty hoof pressed to her nose fell away, and she lifted her other shaking hoof away from her filthy cunt, and instead simply laid spread-eagle on her bed.

She was vaguely aware of the disgusting state that her bed and carpet were in, and the acrid aroma of scat and sex burned her nose. But she didn’t mind. If anything, Rarity loved the fetid stench. She could clean up the mess in the morning - it was a daunting task, even now in her post-orgasmic haze. Right now, she just wanted to lay there and bask in her delicious naughtiness. Everything else was a future Rarity problem.

The exhausted unicorn was so out of it, she hadn’t even noticed the pair of wide, green eyes staring at her through her bedroom door. It hadn’t fully closed earlier, and was instead left ajar for Sweetie Belle to peer into as she left the shower. The strange noises coming from her sister’s bedroom made her curious, but nothing could have prepared her for what she was going to see.

Or just how hot it was.

Sweetie couldn’t tear her eyes away as she had watched Rarity birth her stale shit out of her wet pussy, and especially couldn’t look away as she watched her sister cum so forcefully. A few stray drops of mare cum had nearly hit the wall next to the door, and Sweetie Belle felt a strange desire to be on the receiving end of such a kinky shower.

There were certainly new things that she had learned about herself in the last few minutes, but she could ponder those later. For now, she needed to get to her own bedroom and rub one out more desperately than she ever had before.

But maybe one day she could join Rarity in one of these… sessions. They definitely looked like a whole lot of filthy fun.

Author's Note

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