Messy Teaching

by Odlaw

Rating: mature
Tags: Original Character, My Little Pony: Friendship is Magic, Fetish, Cutie Mark Crusaders, Porn, Sex, Profanity, Cheerilee, Alternate Universe
Length: 12612

A heavily pregnant cheerilee finds herself in desperate need of the bathroom during class. Her students end up enjoying the resulting accident a bit more than anypony expected...

Heavily pregnant, Cheerilee finds herself in very desperate need of a toilet in the middle of teaching a class. Though she foolishly hopes she can hold it until the end of her lecture, both she and the rest of her students end up learning a lot more about themselves than they ever expected by the end of the day...

Warning! Heavy Fetishes Included: Scat, Watersports, Pregnancy, and Foalcon. Also, this story takes place in an alt-universe where ponies wear clothing a little more often.

Another Request Story. This story will eventually have a total of three chapters, with each being written around my other story requests.

Published 2019-07-08 01:30:01 UTC
Last updated 2021-03-21 07:29:50 UTC

The First Lesson

Cheerilee hummed happily as she made her way up the little stone path to the Ponyville schoolhouse. It was early in the morning and most of her students likely hadn't even left their houses yet, giving her plenty of time to set up the day's lesson. It was a Monday morning too, so it was unlikely that anypony would be too eager to get up this early. If it weren't for Big Mac, Cheerilee would probably have ended up oversleeping herself. Thankfully, the hunky stallion knew just how to get her going in the morning~.

After eating a bit more for breakfast than most ponies probably would, though that in itself wasn't all that unusual, she was quick to head out for the school. She'd been having massive cravings recently as a result of her bulging pregnant belly, which even now hung down pretty far underneath her barrel. Ever since becoming pregnant, she'd practically turned into an eating machine. The large morning meal was adding a bit more gait to her steps than usual this morning.

Losing track of time during her little feeding frenzy, she'd been forced to forgo a few things to get to school early enough to prepare for the day. Primarily by skipping both her shower and any chance at using the bathroom. Both probably wouldn't be much of an issue though. Her mane had been a bit messy, but a comb alone had been enough to restore it for the most part.

Thankfully, she had at least remembered to do laundry the night before. At the moment, she was wearing one of her favorite teaching outfits, one that her students were quite used to seeing her in. It included a soft white collared blouse, a deep-blue skirt, and some partially transparent black leggings which went over the white cotton panties covering her marehood and squishy ponut. Both her shirt and skirt were being stretched quite significantly due to her swollen belly, but they were just big enough to handle it.

All in all, she felt pretty good about today...

A young colt yawned as he leaned back in his wooden desk, not really paying attention to the lecture their teacher was currently giving them. Of course, that didn't mean she didn't have his attention in another way. While the rest of the class were busy jotting down things in their notes, his eyes remained glued to Ms. Cheerilee's shapely skirt-draped flanks.

Though he couldn't care less about pretty much everything involving school, he had developed quite a fondness for their teacher. He usually at least pretended to pay attention, but at the moment, he was curious about the way Ms. Cheerilee had been moving around the classroom.

Granted, she already did waddle a bit because she was pregnant, but there was something else odd that had started to show about a quarter of the way into class today. She'd stutter every now and then, and more recently her ears twitched almost every time she took a step. It seemed like she was actively trying to avoid taking any unnecessary steps or movements whenever possible.

He watched with interest as she carefully turned around upon finishing her latest knowledge dump, only to find that the filly sitting right next to him had her hoof raised high into the air.

"Ah, y-yes, Sweet Flower?" Cheerilee asked, babbling as she held a strained smile.

"Um, can you come here, Ms. Cheerile? I don't really get this one problem." The filly named Sweet Flower replied, looking down at her notes with confusion.

A look of dread briefly flashed over Cheerilee's muzzle, and while most didn't really notice, the colt certainly did. She had always been so eager to help her students with just about anything. This odd quirk in her behavior only increased his curiosity as she made her way down the row between his own and the confused filly. She was very nearly as wide as the gap between the desks.

The colt only realized the situation he was unintentionally being gifted as Cheerilee turned to help the filly beside him. Her rear hovered mere inches from his face. Unfortunately, he was unable to see under said skirt unless she were to bend over or decide to lift her tail for some reason. As Cheerilee went through the filly's notes, the colt noticed that she was keeping her back legs closely pinned together.

Tempted to lean down for a peek when nopony was looking, the colt was then caught off guard as he was suddenly bombarded by a forceful gust of hot, smelly air as a loud fart sputtered out through Cheerilee's skirt. Though only for a moment, the force was enough to lift it up, giving him a split second view of precisely what he had wanted to see.

*Pwwwwfrpt!*

What he saw though made the gag-inducing odor worth it. Even though her partially transparent leggings and panties made it a bit difficult, he could easily make out the well-defined outline of both her plump marehood and puffy ponut. It was a sight that made his insides tingle as he sat there in the stunned silence that followed the teacher's surprise expulsion.

Immediately realizing what she'd just done, Cheerilee spun around on the spot, gasping out a quick but sincere apology as her face flushed a deep red color. A few childish giggles and some awkward coughs could be heard scattered throughout the classroom as everypony clearly heard and saw what had happened. It wasn't every day you saw a grown-up, much less a mare, let loose something like that.

Turning to tell the student who seemed almost as flustered as she was that she'd help her out later, Cheerilee quickly waddled back up to the front. She immediately got back to the lesson, evidently trying to pretend that nothing had happened. All the while, her movements were getting more and more erratic and stiff.

Having recovered from the unexpected event, the colt was focused solely on Cheerilee’s rear now, having noticed that something dark had been speckled against the fabric covering the mare's ponut.

'I wonder If she will...'

Cheerilee stumbled over her words as she pointed her hoof to the diagram she'd just drawn on the chalkboard, at this point not bothering to disguise how tightly she had her rear legs pinched together. The lesson was almost over now! She only needed to hold it for just a few more minutes!

But her body seemed to have other ideas. Both her bladder and bowels felt like they were full to bursting, the urge to relieve herself having appeared not long after class started. She was deeply regretting not taking the time to use a bathroom before leaving home.

While craning her neck down to grab some chalk, another surge of pressure nearly ended it all right there and then, but she was just barely able to keep control at the last second. However, this was not without consequence.

*Pwwwffprtp!*

Cheerilee blushed hard as she heard and felt a thunderous fart again putter out of her anus, the sound drowning out her voice completely as everypony in the room heard it. Muffled giggles again rippled from a few of her students, though more were blushing than laughing.

"E-excuse me." Cheerilee stammered, not able to look back at the class as she felt a wave of hot embarrassment wash over her.

Thankfully, the outburst had also relieved some of the mounting pressure in her rectum. There was a good chance she'd be able to make until the end of class now. Clearing her throat, Cheerilee took a deep breath and got on with her lesson.

After a little time, most of the class had calmed down again, though she did pick up on a few scattered whispers here and there. No doubt they were all still discussing her little gas leaks. Little did they know how easily either could have become something much bigger and far more embarrassing...

With a breath of relief, Cheerilee turned back to the chalkboard as her students began packing up their saddlebags. She'd done it! Though she was feeling incredibly desperate at this point, she'd successfully been able to prevent an utter disaster. Though she still needed to go over homework before fully dismissing the class, that was usually a rather quick task. After that, she'd finally be able to rush over to the outhouse back by the playground.

Seeing the chalkboard board still covered with shakily written diagrams and scribbles, she reached down for the eraser that lay along the bottom shelf of the board. However, this simple act of bending down proved to be a huge mistake as, at that exact moment, her body suddenly seized, and the pressure against her ponut returned two-fold in an instant.

Cheerilee only had time to gasp in alarm as she felt her anus spread apart before she could react. The thick and bumpy head of a massive log started pushing out of her as her gasp attracted the attention of the rest of the class who all turned to see what was wrong. They all looked just in time for Cheerilee's front hoof to land on a dropped piece of chalk, causing her to roll and fall forwards. Landing face first, her tail to flipped upwards, inverting her skirt in the process and leaving her flanks completely exposed.

*Crackle* *Pwwrplrpt!*

A third bubbly fart squeezed out around the giant log's girth as it emerged, tenting the stunned teacher's panties and leggings in front of the entire class. Too overcome by shock to muster any resistance, Cheerliee merely lay there in horror as she felt her underwear bulge. The long turd slithered out quickly, bundling up over itself inside her underwear. The growing pile felt hot and creamy between her cheeks as it started to ooze downwards, smearing her marehood with shit as the mess eventually settled at the bottom.

The strange stimulation proved too much to process as the second of her urgent needs broke through her defenses. Hot piss began flooding out behind the growing load, the forceful stream slamming into the mess in front of it. Yellow-brown liquid raced down the inside of her back legs before forming a shallow puddle that grew slowly around her back hooves.

Head still down behind her desk, Cheerilee could only imagine her student's faces as her mind overflowed with shame and embarrassment. She, their teacher and a grown adult mare, was actively pooping and peeing herself in front of them all.

By the time the tail end of her long log finally snapped off from her agape and now quite filthy ponut, the pile of poop covered most of her trembling marehood was huge. It was deathly silent in the classroom as eventually the constant dripping sounds also stopped once her bladder emptied entirely.

With shaky breaths, Cheerilee slowly pushed herself back up onto her front hooves, still staring straight ahead at the board. With an expression full of shame, she slowly looked back towards the class, praying to Celestia that somehow the classroom would be empty.

But she had no such luck. All her students sat motionless in their seats as they were all focused on her messy accident. Yet rather than descending into uproarious laughter, as she was expecting, they all just looked... surprised.

Cheerilee's mouth opened, yet no words came out as she struggled to think of something to say. An excuse, any reason that might explain the sudden soiling of her underwear. But none came. When she did finally find her words, they were shaky and heavy alongside with her rapid breathing.

"C-class D-dismissed!" She shouted, swirling around in less than a second as she turned back to face the class, tail immediately flicking down in order to cover her soiled panties. A sharp tingle raced up her spine as she felt the poop resting in her panties shift and smush from her sudden movements.

Again, without saying a word, each colt and filly quickly grabbed their things and hurried out the schoolhouse door, each one wearing an intense blush as many refused to make eye contact with her. As the last few hurried out, Cheerilee's eyes widened as she noticed something. One colt had not brought any saddlebags to school, leaving his undercarriage fully visible. And there, hanging down under his barrel, a small but clearly hardened shaft twitched as quickly he darted past...

'Oh my...'

The Second Lesson

Author's Note

Been a while since the first chapter, but here we are! Hope you all enjoy!

The Second Lesson

Cheerilee's flanks tensed as several streams of icy cold water rained down against them. The water swirling down the drain a few steps behind her began to take on a murky shade of brown as the showerhead above slowly ate away at the thick layers of waste still stuck to the mare's messy rear.

She couldn't bring herself to turn and see the large chunks of excrement gradually peeling away from her stained fur. Already she could barely withstand the incredibly foul smell that stuffed the bathroom ever since she’d entered it. Catching a brief glimpse of her sorry state in the bathroom mirror earlier had been bad enough.

Letting out a stress-ridden sigh, Cheerilee’s eyes eventually landed upon her ruined underwear and leggings where they lay discarded on the bathroom floor. Visible through a gap in the shower curtains, an incredibly large brown boulder sat inside them. It was almost hard to believe just how much had come out...

The swollen mare grimaced as she recounted the series of events that eventually became the most embarrassing moment of her entire adult life. She couldn’t recall the last time she’d had an accident like this, much less one with witnesses. Yet, what probably pained her the most at the moment was the many ways she could have easily prevented it from happening in the first place.

From her skipped bathroom visit this morning to the many moments before or even during class that she easily could have excused herself to make a quick trip to the school’s outhouse. Yet, for whatever reason, she’d ignored them all in her stubborn determination to wait out the clock.

*Flump!*

Cheerilee grimaced at the sound of a particularly large clump of waste separating from her flanks. She was going to be in here for quite a while at this rate. Thankfully, Big Mac had not been home to see the aftermath of his wife's foolish decision making, likely busy at the farm helping out his sister with the harvest. She was relieved to have at least one less witness to her shameful accident.

It was already worrisome enough that her entire class had watched her soil herself. She desperately hoped that none of them had gone home and told their parents, but that seemed pretty unlikely. For all she knew, the entire town could have heard about it by now. Shaking her head, her mind moved on to something a bit more concerning than even that.

In general, she was finding it rather odd the way that the class had reacted to their teacher having a genuine accident right in front of them. Rather than pointing and laughing as she’d initially assumed, they'd all shared almost the same confused or bewildered expressions. Should it have been one of the other fillies or colts that’d had an accident, she was certain that things would have gone very differently.

There was just no possible way they could have misinterpreted what happened either. From the little gas leaks beforehand, to the enormous brown bulge jutting out from between her flanks, to even the puddle of urine rippling around her hooves. All of it would make it quite clear to anypony that she’d soiled herself. However, she did have a sort of theory... but she didn’t like what it implied.

Though she hadn’t exactly been in the most stable mindset at the time, Cheerilee was fairly certain of what she’d seen dangling rigidly under the barrel of one colt as he was trotting quickly out the schoolhouse door. Somehow, watching her have an accident seemed to have actually... turned him on.

Thinking back to a few of the similarly flustered expressions on the other students present, she began to wonder if he wasn't the only one. Just how many of them had she inadvertently aroused by soiling herself? She knew that the thought of accidentally arousing even just one of her students should repulse her... but it didn’t. In fact, she wasn’t quite sure how to feel about the slight tingle that had been slyly taking root in her clit at the thought of what she’d done...

*Flump!*

Cheerilee hesitated as her hoof hovered a few inches over the doorknob of the Ponyville schoolhouse. It was the day after the incident, yet it still weighed heavily on her mind. She was almost tempted to cancel class for the next few days, but no. Doing something like that would only end up putting their class even further behind than this semester than they already were.

For today, the pregnant teacher had chosen to wear a slightly different wardrobe, if only to not remind the students of yesterday. Unfortunately, due to being as pregnant as she was, skirts were still the only thing that still fit around her broad flanks. Having ruined her usual skirt, the only other one on hand was older and not to mention considerably shorter. Hopefully nopony would say anything...

With a worried sigh, Cheerilee finally pushed through the door into the empty classroom beyond. Her eyes quickly darted to the spot where it all happened. The mess, thankfully being mostly just a puddle of urine by the end of it, was gone from the floor. She’d been forced to clean it up before leaving yesterday, all while still wearing her soiled underwear.

Trotting up behind her desk, she craned her neck down to retrieve a folder that outlined exactly what they’d be starting on today. Having just finished their latest section in the midst of the disaster, they would need to quickly move onto the next subject if there was any hope of getting caught up.

“Hopefully, it’ll be something simple...” Cheerilee hummed to herself, cringing at thought of flipping it open to a page about the pony digestive system.

However, upon placing the folder on top of her desk and turning to the relevant page with her hooves, the teacher's face paled. Oh, it was so much worse...

Never before had this particular colt looked forward to school. Yet, here he was, pushing through the schoolhouse door as one of the first to arrive. There were a few other students sitting idly at their desks already as well, including the filly that sat next to him the day before. However, his eyes were immediately drawn to the only fully-grown mare currently occupying the classroom.

Unlike on any other day, Cheerilee had not turned to greet him or likely any of the other students as they entered. Instead, she remained seated behind her desk, hidden behind a big red folder that covered up her face. Trotting quickly over to his desk, the colt sat down and waited patiently for class to begin, sometime in the next twenty or so minutes based on the clock above the chalkboard.

The events from the previous day still swirled around in his mind like a hurricane. He’d been thinking about it all night, barely getting any sleep at all. From what he’d overheard after class from a few of the other colts, he likely wasn’t alone in that regard. Granted, none of them likely knew why it was that all their stallionhoods felt so strange.

Having learned a lot more about where foals come from than he probably should from his older brother, he was well aware of the reason. That didn’t make it feel any less weird though. Being aroused by a mare’s privates was one thing, he could understand that, but not once had he ever overheard his brother bragging about his marefriend’s latest messy accident.

Was it normal for something like that to turn him on so much? He honestly wasn’t sure, but given the other colts' similar reactions, it had to be, right? Though part of him desperately hoped Cheerilee might discuss what happened yesterday, he was pretty sure she would be actively trying to pretend it never did.

He did kind of feel bad for the mare to be honest. No doubt the experience had to have been extremely embarrassing for an adult like herself...

As the last few foals made their way to their assigned desks, Cheerilee finally peered up over the top of her folder. Quickly scanning the room, she was surprised to see not a single pony absent today. Lowering her head back behind her makeshift shield, she let out one last sigh before laying the folder down flat on the desk and getting up to start class.

“So, ah, g-good morning everypony!” Cheerilee greeted with a strained smile, her usual cheery voice far less enthusiastic than usual.

“Good Morning Ms. Cheerilee!” Many of the students answered back.

The familiar chorus of voices was almost comforting, with no indication that they carried much of anything from the previous day. Still, with what she saw still lingering in the back of her mind, Cheerilee couldn’t help but worry about the new topic they’d start covering today.

“So, today we are going to start learning about a brand new subject!” She announced with a nervous smile.

There were a few scattered groans from the back of the room. For many, it seemed like they’d only just gotten the handle on the math from the previous section. Regardless, Cheerilee turned and grabbed a piece of chalk. Writing on the board, it took a few moments before her students could make it out. Once finished, Cheerilee turned back around, a subtle blush having risen on her cheeks as two large bold words were displayed behind her.

‘SEX EDUCATION’

This time it was the foals’ turns to start blushing as many realized that the next few classes were going to be... very interesting...

Cheerilee sighed in relief as she drew another diagram up on the chalkboard. This one was revealed to be of a fairly phallic nature, being heavily based on a certain stallion’s pride and joy. But nopony else in the classroom needed to know that, as it is, she’d drawn it quite a few times for them by now anyway.

It had been almost a week since the accident, and thankfully, things were going much better so far than she had feared. Not one of her students had said a single word regarding the incident if anything seeming far more focused on the awkward lessons they were being lectured on each day.

Things were going very well indeed... that is until a certain little filly raised her hoof to ask a question.

Cheerilee stopped drawing as she noticed a raised hoof in the corner of her vision. Turning around with a relaxed smile, she called on the innocent young filly.

“Yes, Sweet Flower, did you have a question?” Cheerilee asked, looking actually somewhat happy to have a question to answer for once. Most of these lessons had been pretty silent so far, with the occasional immature giggles mixed in here and there. The still quite pregnant teacher had gone back to wearing her usual favorite teaching outfit as well, no longer worried about bringing anything up by wearing it.

"Um, Miss Cheerilee... would it be considered weird to be, uh, ‘aroused’ by like... other stuff?” Sweet Flower asked sheepishly, staring down into her textbook as if actively avoiding eye contact with her teacher.

A strange silence swept over the room as any whispered conversations suddenly stopped dead in their tracks. The filly’s question had very abruptly become the focus of the entire classroom, much to Cheerilee’s surprise. It was as if they had all been waiting for this to happen.

“Well, um, I suppose that depends on what you meant by ‘other stuff’?” Cheerilee responded, still not making the connection as to where this question was coming from. “There is an upcoming section that regards some common fetishes that we’ve already very briefly touched on the day before last, in case that is what you’re referring to?” She suggested. Unfortunately, the real motivation prooved to be much more personal.

"Uh, well, you know that, um, that thing that happened last week?”

“Do you mean the first lesson?” Cheerilee replied quickly, almost cutting the filly off as a bead of sweat rolled down the side of her head. A heavy tension had suddenly washed over the room as the teacher very quickly realized what the filly was actually referring to. All the shame and concern she’d eventually shrugged off had now returned full force.

“Um, no, it happened the day before that. You know? When you, um, went potty in your panties? It made me feel really warm and wet between my flanks, just like you said arousal does for mares.” The filly clarified much more bluntly than anypony in the room had really been prepared for. “Is that weird?” She continued, face clearly full of concern as she looked up with two puppy-dog eyes.

Cheerilee’s mouth opened but no words came out as she struggled to come up with a reply. Though she’d already pushed this very situation out of her mind days ago, here it was, rearing its ugly head. Judging from the equally worried faces of other students around the classroom, this filly certainly wasn’t alone.

‘Oh dear Celestia what have I done...’

As a tense and awkward situation was developing right next to him, a very colt watched closely. It was finally happening! He’d been hoping that somepony would finally bring up Cheerilee’s accident ever since it happened, but never could he have imagined it would go down like this!

A tingly sensation took root between his hind legs as he noticed his teacher’s gaze very briefly flicker in his direction. Though in doing so, he happened to notice that she hadn’t actually been looking at his face, and rather further down his body. He began to wonder... had she seen his stallionhood when it got all hard that day? He knew he hadn’t been the only colt, though most of the others happened to be wearing something to that day that would’ve concealed it.

“Um, Sweet Flower, maybe we should discuss this after cla-” Cheerilee started to say, only to be cut off by another voice.

“Um, Ms. Cheerilee?” Another student on the other side of the room called out. “I kinda felt the same way too...” The normally very shy colt blurted, drawing everypony’s attention.

Before Cheerilee could try and reply, more and more hooves slowly joined the colt’s in the air all around the classroom. In mere moments their teacher was utterly left stunned, her mouth agape as she stood before an entire class of foals that were all now admitting to having been aroused by her having an accident in front of them...

“I-i, ah, I...” She stammered, truly at a loss for words as she struggled to respond to the foals’ intimate curiosity. “W-well, I’m certain that, uh, there must be... some other r-reason.”

“Nuh-uh!” One of them quickly objected. “When you started filling up your undies, my thingy got super stiff!” He asserted. “It wasn’t even from looking at your mare parts either Ms. Cheerilee!”

“I-i... r-really?” Cheerilee stuttered, clearly shocked by not only the colt’s assertion but by the surreal situation as a whole.

Several foals around the class nodded in agreement, with many feeling more open now that they knew there were others who felt the same way about this as they did.

“Yea!” One largely innocent filly shouted. “Though, I really liked the peeing part too! Like, did you see how big of a puddle there was around her hooves!”

Once again, several nods and exclamations of agreement were made from all around the room. Cheerilee watched on in stunned silence as her entire class discussed the incredibly embarrassing topic openly amongst themselves. Each was vividly describing their favorite parts of what they’d seen, with many of the colts not even noticing as a ‘fifth leg’ slowly extended from their crotch.

Turning to look up at Cheerilee, the one colt who had so far largely not participated in the spectacle tried to read the expression on her face. It constantly twisted from emotion to emotion. Concern, embarrassment, a hint of disgust, and even shame each took their turns. A battle was clearly roaring inside her mind as one expression began to dominate all the others. Looking like a mixture of embarrassment and relief, it was one the colt could only describe as ...arousal.

“H-have...” Cheerilee started to say, the room going quiet again as if everypony had forgotten she was even there. “H-have any of you t-told anypony else about this?” She asked shakily.

A few heads shook side-to-side around the room, a movement that eventually spread around the room until it was revealed that, by some miracle, not one of them had said a peep about it to anypony until just now. Be it because they were just too embarrassed, or because they just didn’t think to do so, the only ones who knew were in the classroom now.

This fact seemed to finally settle the indecision on Cheerilee’s face as the mare closed her eyes, tilted her head back, and let out a massive sigh of relief. Looking back down a few moments later, an actual smile had made its way onto her muzzle.

“W-well... I suppose...” She began, a deep blush growing on her cheeks. “If you can all promise not to tell anypony else about this, then... I guess I could... do it again...?”

Cheerilee could hardly believe what was happening. Here she was, just over a week after the most embarrassing moment of her entire life, and now she was about to reenact it for all her class to see. It had been a day since her offer, and she’d come prepared, having exactly repeated her actions on the day of her original accident.

Front legs folded up underneath her as she lay half on top of her desk, Cheerilee faced the classroom chalkboard. Her tail was draped up over her back, leaving the mare’s flanks completely exposed to the eager audience sitting at their desks behind her. Over twenty individual pairs of eyes were glued to her vast panty-clad rear, all excitedly anticipating the naughty act that their teacher was about to perform for them.

They’d all agreed instantly to her terms, though the teacher could only pray they’d actually keep their word. There was no telling what might happen if word were to ever get out about this, but there was no going back now. Already she was exposing herself to a classroom of foals, many of which now scanned the well-defined protrusions created by her puffy ponut and pussy.

Cheerilee’s belly groaned as her insides churned impatiently. She’d already kept both herself and the students waiting until the last quarter of class time, and by now her bowels and bladder felt like they were near to bursting. Though not so long ago she would have been disgusted by what she was preparing to do, it now excited her more than just about anything had in years. A fact that was emphasized as her clit winked, the sensitive pink bulb peeking out from her vulva and pressing up against the stretchy fabric of her white panties.

*Prrrrrrrrt*

Cheerilee gasped as a sharp fart vibrated her puckering ponut, a sort of final warning that her bowels were about to be unleashed, whether she wanted them to be or not. At the same time, the sudden vibration had startled the mare just enough to briefly weaken the iron grip she was barely maintaining on her bladder, leaving behind a small but noticeable wet spot over her marehood where a leak had momentarily sprung.

*Brrrrrpt~!*

A second bubbly eruption of gas was all it took to finally shatter the mare’s composure completely. Immediately the small wet spot over her pussy began to expand as a forceful stream of light yellow urine burst through her vulva. Cheerilee couldn’t help but moan in ecstasy as an incredible wet warmth spread throughout her underwear as they were quickly flooded with piss.

Several thin yellow trails rolled down from the edges of her panties, following the inner side of the mare’s hind legs as they rushed down to a rapidly expanding puddle below. A majority of the torrential flow seemed to penetrate straight through the fabric of her underwear, however, forming into a thick stream of urine on the other side which arced down onto the floor just a few inches in front of the first row of desks.

As all this was happening, an increasingly loud wet crackle could be heard as Cheerilee’s puffy anus widened. From within, a massive log emerged from her bowels, quickly making contact with the interior of her tight underwear. Pausing for just a moment upon meeting resistance, a sudden cramp surged the turd forward once again, tenting the fabric several inches away from her plump cheeks.

This huge protrusion continued to grow longer and longer as more of the log extended from her ponut, the peak turning a dark shade of brown. Eventually, though, the column of shit could stretch Cheerilee’s panties no further, instead folding in over itself as another cramp forced even more shit through her anus.

Falling down into the underside of her underwear, the teacher felt a powerful spark of pleasure as the messy log bundled up against her still-pissing pussy. The stream shooting through the fabric quickly vanished as it was blocked by a thick wall of mushy poop that only continued to grow as her bowels emptied. The bulge forming in the seat of her panties had already surpassed the one from her previous accident, already growing to almost the size of a small pumpkin.

Alongside one final surge of shit that filled every last crevice in her panties, Cheerilee finally came, her damp hind legs trembling as an orgasmic high unlike any she’d ever experienced before caused explosions of pleasure to ripple all across her body. Crying out in ecstasy, she very nearly collapsed off the desk, just barely mustering the strength needed to support her messy flanks, which now seemed to weigh many pounds heavier from the weight of her loaded underwear.

*Ssrpprrrft!*

One last wet fart signaled the end of her immense but surprisingly quick bowel movement, followed shortly by the last few drops of murky brownish-yellow piss that dripped down from the low-hanging bulge of her sagging panties. Still bathing in the wonderful afterglow of her orgasm and relishing in the wonderfully filthy warmth of the densely packed shit up against her plot, Cheerilee eventually craned her neck around to look back at her slackjawed students.

Most were speechless as they stared up at their messy teacher in shock. Every colt not wearing something over his lower half very obviously sported a full and throbbing erection, while many of the fillies had completely soaked through their own underwear with the juices of their arousal.

“That. Was AWESOME!” A chorus of voices exclaimed together, leading Cheerilee’s already reddened face to deepen even further.

At that exact moment, their panting teacher had made a final decision.

‘This is definitely not the last time I do this~...’

The Third Lesson

Author's Note

Whew, this one is long overdue. Actually thought I had already published this last chapter months ago. Didn't realize I hadn't until the original requestor msged me. Sorry, and expect some other new stuff coming fairly soon.

The Third Lesson

“Um, Ms. Cheerilee?” A sheepish student called out from her desk in the Ponyville schoolhouse.

The young filly's left hoof waved desperately in the air above her head while the other leg was hidden from view. It was only from below that one could see her hoof gently sliding up and down through the moist folds of her pussy.

“Hmm?” The teacher hummed, turning away from the chalkboard. “Yes Sweet Flower? Did you need something~?” Cheerilee asked, her voice smooth and somewhat seductive.

“Could, um, c-could you t-turn a little bit more please? We can’t see very much on this side of the room.” The filly replied, her face burning brightly as she could practically feel her teacher’s eyes on her as they briefly glanced down beneath the desk.

Cheerilee chuckled at the filly’s flustered request, though she was quick to indulge her. Repositioning slightly, the grown mare now more directly faced the chalkboard, ensuring that the entire class would have an equally fruitful view of her plump flanks. Or, more importantly, the enourmous bulge hanging down from her panties.

“Is that any better for you all? Can you see my messy panties now?” Cheerilee asked, gently swaying her hips side-to-side and making the lumpy protrusion to sway.

“Y-yes Ms. Cheerilee!” The filly yelped, using both hooves to pleasure herself as a scarlet hue enveloped her entire face.

Sweet Flower’s gaze was now firmly locked to the bloated seat of Cheerilee’s underwear, though she certainly wasn’t the only one actively pleasuring herself to the enticing sight. Just about every other colt and filly in the room were performing similar erotic motions in more or less the same manner. Though a few were dedicated enough to also be taking notes on what was actually being taught, the two weren’t all that different anyway.

“So far everypony is doing a wonderful job~.” Cheerilee cooed. “Just make sure that you are all paying very close attention as you're following along with me. Remember, the key is to use slow but firm strokes at first. You’ll want to feel all that hot tingly pleasure building up for as long as possible, okay?” Cheerilee explained, turning her head back to resume drawing a few more ‘helpful' diagrams upon the board.

As she began to draw the broad head of a stallion’s pride and joy, the mare’s pussy winked, her clit tagging the dense pile of manure which had only just recently been pushed out into her panties. Suppressing a moan, she began to wonder how in Equestria she’d managed to get to this point.

It’d been almost four days since she soiled herself in front of the entire class for the first time, and almost every day since, she’d been doing her level best to accommodate for her students’ newfound favorite fetishes. It just so happened that their latest topic was perfectly aligned with this goal, with their current lesson covering the ever taboo subject of masturbation.

Granted, the version of the lesson plan that she was teaching them was a bit more... ‘vivid’ and ‘interactive’ than the one from their textbooks. Most notably, it critically failed to include the parts where she'd instruct the entire class to masturbate while she pooped and pissed herself. Still, Cheerilee was confident that her alternative way of teaching was pretty popular~.

Sitting beside the filly who’d raised her hoof earlier, a very happy colt panted quietly in his chair as he feverishly stroked his twitching member. Never in a million moons could he have ever imagined that one of the most boring parts of his day would so quickly become his utmost favorite. A little over a week ago he’d been desperately trying to fend off boredom by perving on Ms. Cheerilee’s, but now, there was barely any skirt left for him to look under. The clothing their teacher wore seemed to be getting shorter and skimpier with each passing day.

“Mnf~!” A small voice yelped on his left.

Tearing his eyes away from his teacher’s soiled underwear for a moment, the colt glanced over just in time to witness Sweet Flower's body tremble as an intense orgasm rocked her. Both forelegs remained tucked deep between her thighs, with a glistening layer of juices coating their ends. After a few whimpers of pleasure, the cute filly finally collapsed face-first onto her desk, a blissful smile spreading across her lips as she rode her orgasm for all it was worth.

“My, my~” Mrs. Cheerilee chuckled, instantly regaining the colt’s attention as she craned her head back around to look over her classroom with lidded eyes. “I see that a few of you are already finishing up~.” She giggled, spotting a few foals around the room who had climaxed at around the same time. “Don’t worry if some of you didn’t last quite as long as some of your classmates. Trust me, you will all have plenty of time to practice before your ‘special surprise’ this friday~...”

Cheerilee couldn’t help but anxious. It’d been a doozy to set up, but today would finally be the big day. Her whole class was doing far better in their studies than ever since the introduction of her new ‘teaching method’. Not a single foal had scored below an A on a single assignment as of yet. Therefore, for all their diligence and hard work, they were certainly due for a very special reward, and no mere pizza party would suffice this time...

"Are you sure you need this for your class? I wasn't aware they went over these kinds of things at the schoolhouse?" The voice of Twilight Sparkle echoed in Cheerilee's mind.

A very large bowel movement would be critical if today's activities were to be successful, and thankfully, Ponyville's local spell and potion aficionado happened to have just the thing. She'd offered the excuse that it was needed for an explanation in class, and by some miracle, it had worked. Granted, the chance that Twilight Sparkle would have been able to guess anything remotely close to what she was really going to be doing with it today.

Cheerilee let out a shaky sigh, still feeling jittery as she glanced sheepishly up at her husband who stood beside in front of the schoolhouse door. Honestly, she could hardly believe how well things were going already, though nothing had even happened yet.

“You're sure that you'll be ready for me when I call you honey?”

“Yep.” Big Mac replied with a subtle nod, his characteristically calm demeanor shining through despite being fully informed as to what was about to go down.

His stoic neutral attitude contrasted starkly with the thick meaty shaft bobbling gently beneath his broad and muscular barrel. The stallion’s cock was truly a monster, though the fact that he was already a little excited was a good sign. As much as she’d been worrying, it seemed like at least part of him eagerly anticipated what his wife had planned.

Even now, Cheerilee wasn’t sure how she managed to convince him into agreeing to all of this. It wouldn't have surprised her in the slightest if he'd been downright appalled and disgusted when she told him what had been going at the school the past few weeks. Yet, even as she desperately tried to explain herself at the dining table, tears streaming down her face, he’d just sat there listening with a thoughtful expression painted over his muzzle. In the end, he’d actually come round... pretty much immediately.

Cheerilee took a moment to slow her increasingly erratic breathing. The tense excitement in the air was getting the better of her now, though could anypony really blame her at this point? Today would be the day that she’d not only be getting fucked by her husband in front of her entire class, but they’d all likely end up doing similar with each other before long. It just seemed too surreal to be true.

Every student had probably already arrived by now and was no doubt waiting excitedly at their desks for her to arrive, eager to learn what their promised ‘special surprise’ was going to entail. So, with one last deep breath to calm herself down, she quickly double-checked the contents of her saddlebags and reached for the doorknob...

Hushed conversations filled the air inside the Ponyville schoolhouse as students awaited the arrival of their beloved teacher. Some talked about what they were planning to do after class today, meanwhile, others pondered when they’d be able to have their next sleepover. However, the vast majority were locked in a classwide heated debate. What would the ‘special surprise’ that Ms. Cheerilee had promised end up being?

“Oh, wait! What if she shows us the inside of her panties, right after she goes inside em?!” One colt proposed.

“Aw, that’d be awesome!” A filly sitting behind him replied, biting her bottom lip as she imagined the scene playing out in front of them all.

“O-or, what if she’s going to use one of the toys she taught us about last week!?” Another filly gasped, causing many others to do the same.

“Oh, that’s totally gotta be it!”

However, before any concrete conclusions could be reached, the sound of the schoolhouse door opening sent a wave of silence washing over the room. Everypony quickly stopped whatever it was they were doing and faced forward in their seats. Cheerilee trotted calmly into the classroom, the front door swinging closed behind her as her huge belly almost touched the floor.

Her skirt today looked like it was cut to only a few short inches in length, leaving the mare’s black satin panties fully exposed as she made her way to her desk. A white blouse struggled to surround her swollen barrel, the buttons straining to keep the fabric together. Her flanks had also grown in size recently, though it was pretty clear she hadn’t bothered to buy any larger pairs of panties to accommodate.

For the moment at least, they remained clean and smooth as they clung tightly around her plot. The tension of the fabric stretching between her flanks would ensure that anything which happened to find its way inside of them would be made very obvious. As it is, the prominent shapes of both her puffy ponut and plump pussy were very well defined, leaving almost nothing to her students' imaginations.

“Good morning class!” The furiously blushing mare finally greeted, setting her saddlebags on top of her desk before reaching in and retrieving a large paper bag. Light from the morning sun that came through the windows shone right through the thin brown material, revealing a rather phallic-looking shadow sticking up inside it. A gasp of excitement from a filly near the back of the class was quickly shushed by all those around her.

“Good morning Ms. Cheerilee!” The class finally replied in unison.

Before she began, Cheerilee reached down into the paper bag, taking out a small purple bottle. Uncorking it with her teeth, she tilted her head back and hastily guzzled the contents. A few confused looks were shared among the class as they wondered what their teacher had just drunk. Clearing her throat as she set the now empty bottle down on her desk, Cheerilee turned to her class.

“Now, as you all no doubt are aware, today’s lesson is going to be a... very special one. Over the course of the past two weeks, all of your test scores have been improving dramatically! In fact, I'm very proud to announce that not a single pony in this room is currently sitting at a grade below a ‘B’!" She announced proudly, prompting cheers from the class.

"With that in mind, I believe it is high time that you all earned a reward for your efforts~.” She went on to explain, a saucy tone gradually bleeding into her voice.

A few exciting murmurs followed, with a few foals’ hooves subconsciously gravitating towards their crotch in anticipation.

“Therefore, for today’s lesson, I will be providing you all with an in-depth and very thorough example of several of the different concepts we’ve been going over together.” She explained, raising her voice as more cheers began to erupt. “First things first, however...”

Turning around, Cheerilee pulled the desk chair out from behind her desk and pushed it's back up against the front side of her desk, leaving the chair facing the deeply curious students as they all began to wonder what their teacher was up to. Reaching into one of her saddlebags, Cheerilee pulled out a small pink oval-shaped object connected to a tiny pink plastic box by a long cord. Blushing deeply at the mere sight of one of her favorite toys, she again turned to face the class.

“Would anyone like to volunteer to come up and assist me with this next part?” She asked, batting her eyelashes.

About half the room instantly raised their hooves, causing Cheerilee to chuckle at the eagerness of the foals. She scanned the sea of eager volunteers a few times until finally, her eyes fell on one colt near the front who seemed the most determined to get her attention. She quickly recognized him as the very same colt she’d seen erect the very first time she pooped her panties in front of them all. Standing up on top of his seat, the foal’s already semi-hardened member was in full view. Just like always, he'd not bothered to wear pants to conceal it.

“Ah, Pileup Plush, was it?” Cheerilee asked, gesturing to the colt.

“Y-yes Ms. Cheerilee, that’s me!” He yelped excitedly, practically dancing on the tips of his hooves.

If she was remembering correctly, he was far and above the student with the biggest overall improvement in his grades. He'd gone from making low Ds and Fs, to B+s in record time. Such hard work and dedication would certainly be worth rewarding~.

“Would you mind coming up here and helping me with something please~?” She asked, beckoning forward him with a wink and a wave of her hoof. There were a few short-lived groans of disappointment from some of his other classmates as the colt shook his head and leaped out of his desk. Still, they seemed plenty excited to see what Cheerilee was going to have him to do.

As Pileup trotted up to the front of the classroom, the mare turned and lifted herself up onto the chair. Turned towards the chalkboard so she was sitting backward. Her hind legs were left spread apart over the front end of the seat, hanging off either side while her voluptuous flanks hung a few inches over the seat. The fabric of her panties strained to span the even large gap she'd created between them. Stunned by the mouth-watering sight before him, Pileup took a moment to register that his incredibly hot teacher had started talking to him again.

“If you wouldn’t mind, could you please pick up that little pink capsule I left on my desk?” Cheerilee asked, leaning over and nudging the small device towards him. “You’ll need to pull aside my panties first, but I’d like you to put the round part as deep inside my pussy as you can. Do you think you could you do that for me Pileup~?”

The colt gulped, his heart pounding in his ears as his cock throbbed hard at the teacher’s bluntly put request. With a sheepish nod, he snatched the little device off her desk. On the other end of the cord, he found a small plastic box. On it was a red switch and a small dial that counted from one to three.

“Here you go honey, this might make it a little easier for you~.” Cheerilee cooed, drawing the colt's attention.

With no hesitation, Cheerilee reached back and, with both hooves, spread her flanks apart. The fabric of her panties finally collapsed inward, bunching up deep along the crack of her ass. He could already smell an intoxicating musk emanating from the mare’s backside, drawing him in closer and closer. Reaching out with his one free hoof, he very carefully slid the gusset of the mare’s underwear aside, finally revealing Cheerilee’s plump pussy in all its glory. He’d really only seen glimpses of it up until now, but those glances couldn’t even hope to compare.

His breath hitched as he witnessed the mare’s clit briefly reveal itself, winking out from her moistened vulva as his warm breath reached the mare’s sensitive opening. Inhaling her sweet scent from up close, the colt winced as his dick throbbed painfully. Never before had it felt so incredibly hard as it did right now.

But then, before he could even attempt to do what Cheerilee instructed, he was suddenly blasted by an entirely different odor as the mare’s ponut erupted.

*BRRRRRAAAPPTT!!!*

Pileup instinctively recoiled as he took the full force of his teacher’s flatulence to his face, instantly reminding him of a very similar incident from the day this had all started.

“Oops~, Excuse me~” Cheerilee giggled, biting her lip mischievously as she gazed back at the stunned colt standing behind her. Her puffy ponut continued to flex and tremble as if threatening to unleash another burst of hot air into his face at any moment. “I need to go so bad right now, I just couldn’t hold it in any longer~.”

Feeling his cock throb again, a primal urge to try and mount his teacher very nearly overpowered the virgin colt. Finally, with another shaky breath, he reached forward with the device resting in his hoof, hesitating only an inch from the mare’s steadily dripping pussy. Pushing onwards, he felt a shiver run up his spine as he pressed the small pink bulb into the mare's wet entrance. He could already feel the heat of her arousal on the underside of his hoof.

“That’s it, push it deep inside of me, as far as your little leg can go alright~?”

Doing as he was told, the colt’s foreleg began slowly but surely delving into Cheerilee’s quivering folds. Inch by inch his hoof disappeared inside the mare, her inner walls growing tighter and tighter as they squeezed and massaged at the very welcome intruder. It wasn’t long before he was up to his shoulder inside her, with the small pink box left danging in the air in front of the teacher's chair. Pileup suddenly realized his face was mere inches from his teacher’s delectable flower, and it took every fiber of his being to resist diving right in and lapping up all the sweet juices that were leaking from it.

“G-good boy~." Cheerilee shuddered, clearly enjoying herself. "N-now pull out slowly and leave that little capsule inside me, can you do that for me?” Cheerilee moaned, her whole body shivering every time he moved even the slightest amount.

Pileup slowly extracted his thoroughly soaked hoof from the depths of his teacher's pussy, until finally, he was free. A thick coating of the mare’s sweet-smelling secretions was left behind along its length. Even as he stared down at the matted fur, he could hardly believe what he’d just done.

“Now, if you could try and put my panties back the way they were and set that little box down on the desk where I can reach it, please? You’ve done a very good job Pileup. After that, you may sit yourself down right behind me. Please hurry though, I was just barely able to hold it while you were inside of me~.” Cheerilee chuckled, grunting softly as she repositioned herself so that her panties would be able to cover her backside again.

The colt quickly did everything he was asked to do, though admittedly it felt a little sad to cover up his teacher’s privates. After placing the pink box up on the desk within reach, he proudly plopped himself down on the floor right behind the clearly desperate mare, having earned his front-row seat for what was to come.

*Click*

“Aah~!” Cheerilee suddenly gasped, her legs tensing up as she switched on the device at its first setting.

Though faint, Pileup could just make out a faint humming from her backside. The tight fabric of her panties, once again spanning the gap between her flanks as best they could, showed her ponut as it flexed and clenching repeatedly while her pussy winked multiple times in a row.

“N-now class, f-for the first part of today’s lesson, we’ll s-start off with some more self-love p-practice.” Cheerilee stammered, already struggling to address the class and keep herself composed while the vibrator worked its magic. “T-this little box is going t-to make it very h-hard for me to hold it, so I want you all to pay very close a-attention for the moment I lose control~.”

Though some in the class had already started pleasuring themselves long before she’d said anything, the rest quickly understood what their teacher was planning to do and raced to catch up with their classmates. As colts all around the room started stroking their stiffening cocks and fillies rubbed their sensitive slits through their panties, Cheerilee let out a whimper as she was too overwhelmed with pleasure to stop a surge of pressure rearing its head at her back door.

*Prrrrrffptt~!*

“Oh Celestia, there’s so much!” She exclaimed as a second putrid fart ripped from her ponut.

Her hoof trembled as it sat idle atop the box’s intensity dial. The gassy eruption seemed to be her final warning. It wouldn’t take too much more now for her to break.

*Tick!*

“AAAhh~!” Cheerilee cried out, having turned the vibrator up to its second intensity setting.

Though there was no fart to follow it this time, the class quickly took notice of a glistening patch of darkness that was rapidly spreading through the fabric of their teacher's panties. Unable to hold back the tide any longer, the sound of urine spilling into Cheerilee's chair grew louder. It wasn’t long before an unstoppable flow of piss had flooded every inch of the mare’s panties. There were a few grunts from around the room as various students took in the sight of their teacher genuinely wetting herself uncontrollably.

“Mhh-ahh~” Cheerilee moaned, her hind legs trembling as miniature rivers of hot piss streamed down the inside of her thighs, streaking through and staining her clean coat.

Pooling in the seat, it wasn’t long before urine began to overflow and spill off onto the floor. Pileup watched the miniature waterfalls of leaking piss, moaning as the strong scent of his teacher's urine infiltrated his nostrils. The combination of arousing stimuli was almost too much for him, allowing the colt only moments to halt his rapid stroking as his climax raced up to greet him. The reminder that Cheerilee was almost certainly about to shit herself as well left him with a thick string of pre-cum dangling down from the tip of his throbbing cock as it seemed like even the slightest touch could make him cum at this point.

Cheerilee herself had also come close to reaching her limit, though she had no intention of giving herself even a moment to breathe. In fact, even she sat there, legs spread apart with another surge of pressure against her anus imminent, she didn’t hesitate to turn the vibrator to it’s final highest setting.

*Tick!*

“O-oh f-fuck~!” Cheerilee stuttered, back arching as her entire body shook at the thought of the now unavoidable accident she was about to have.

*FFRRPP-tchkk~*

Just as a third wet and bubbly fart began to sputter from the mare's quivering ponut, splattering the interior of her panties with speckles of liquid waste, a loud crackle signaled the emergence of her first log. Glancing up just in time, Pileup watched in awe as the thin fabric covering Cheerilee’s ponut was suddenly tented outwards several inches. He’d seen his teacher fill her panties so many times over the past few days, but never once from this close.

“I-it’s coming out~!” Cheerilee cried, reaching orgasm almost instantaneously as her asshole was spread apart by a truly titanic log of shit.

*Phttchhk~!*

A huge bulge was rapidly taking shape beneath the mare's flagging tail, one that only continued to grow larger and larger with each passing second as more and more waste piled into her soaked underwear. The fabric quickly reached its limit as it was unable to stretch any further, collapsing the long protrusion. Widening and spreading across her flanks, Cheerilee felt the slimy muck sweeping down overtop her sensitive pussy.

The constant soft crackling that accompanied the teacher's forceful bowel movement reached every ear in the room as the flow of solid waste gradually began to soften. In a matter of seconds, she could feel the hot gooey mess touching every little crack and crevice it could find within the confines of her panties. The thought of all that hot and sticky poop enveloping her pussy as it continued to wink, coating her sensitive clit with shit, sent the mare over the edge yet again.

“Ouugghh~!!!” She moaned, eyes rolling upwards as she bathed in wave after wave of pleasure.

Sitting right behind her, Pileup sat utterly entranced by the thick coils of creamy logs he could see building up against the seat of his teacher’s underwear. Though he’d done his best to hold back until now, the moans that joined Cheerilee's second orgasm was all that was needed for him to launch several thick ropes of sticky cum up onto his teacher’s ass. His whole body felt hot as he came, the tip of his cock erupting as he watched his liquid seed leap up onto the lumpy surface of Cheerilee's panties, again and again, soiling then even further while the entire class watched on in awe.

Like a chain reaction, several more moans and cries of ecstasy reverberated from the class as several colts and fillies reached their limits as well. Be it with their hooves entrenched deep between their trembling thighs or held tightly around their throbbing cocks, at least half the class came in unison. The sound of seed plastering the underside of desks was mirrored with the sight of fillies flooding their seats with sweet-smelling secretions.

As labored panting dominated the heated atmosphere the air in the classroom, Cheerilee was able to muster the energy to glance back at the colt splayed out on the floor behind her. An expression of pure satisfaction was evident on his face as his body continued to twitch and drool leaked from his mouth.

"T-thank you very much for your help Pileup... you may return to your desk now, okay honey~." She sighed lovingly, feeling totally out of breath as she enjoyed the small jolts of pleasure still being created by the vibrator. It was almost inaudible now, her pussy utterly enveloped by a thick layer of poop.

Pileup lay motionless on the floor for a few more moments as he recovered, still seeing stars. He eventually got to his hooves and stumbled back to his desk. Cheerilee couldn't help but feel her clit spasm as she watched the colt's softening cock hang below his barrel, a thick string of white fluid trailing along the floor from its tip. Finally flicking off her vibrator, she gently tugged on the connected cord, lightly gasping as the thoroughly shit-smeared capsule slipped free from her bulging panties.

Stepping down slowly and shakily from her chair, she cleared her throat and calmly brushed her slightly frazzled mane back with her messy panties still facing the class. Trotting back around to the right side of her desk, she looked towards the door and at the pair of green eyes that were peering in through its tiny trio of windows.

"Alright then class, for those of you who haven't quite finished yet, I hope you can hold out a little bit longer while your other classmates are recovering. You see, there's one more special thing I wanted to do for you all today, the real suprise~."

A few ears perked up at the teacher's promising words, with some in disbelief that things could get any better than they already were. Just the sight of Cheerilee's side profile and the huge bulge extending from her flanks seemed like an insurmountable view.

"Oh, honeyyy~? You can come in now~." She sang aloud, waggling her hips tantalizingly as she called out in the direction of the door.

*SLAM*

Cheerilee yelped in surprise as the front door violently burst open, revealing a very determined red stallion breathing heavily in the doorway. Suspended below him, his massive cock throbbed with raw desire, prompting a few gasps from the class as many gawked at the sheer size of the stallion's dick. None could imagine it being possible for it to fit inside of a mare. Even Cheerilee, who was already well accustomed to her husband's above-average girth, gulped anxiously at the sheer scale it had swollen to while he watched her from the window.

"W-well class, for this next 'lecture', me and my husband will be providing you all with an intense demonstration of this month's, uh... subject matter." She began to stammer, a bead of sweat rolling down her brow as the mare waddled her way up to the right side of her desk. "M-make sure to take plenty of very detailed notes!"

Rearing up, she carefully mounted the desk as best as she could, practically laying atop her enormous belly as she flicked her tail up over her back. With it out of the way, she presented her husband with her filthy behind, ready for whatever he wanted to do to it.

Yet, instead of rushing forward to mount her as both she and her class were expecting, Big Mac rather calmly trotted instead to the paper bag Cheerilee had left on her desk. Reaching down into it, he fished out the other toy she'd brought along for today. From the bag emerged a huge dildo. Bright red in color and adorned with several small bumps and ridges that ran up along its intimidating length, it honestly wasn't all that different in size than the stallion's own cock... though certainly not quite as big.

He snickered as he noticed his wife eyeing the phallic toy nervously. Trotting back behind her as she bit her bottom lip in anticipation, the stallion took a moment to first admire the teacher's massive panty load. Then, slowly but surely, he began to press the head of the phallic toy into the bulging seat of Cheerilee's underwear. Pushing into the packed pair of panties, the mare's voice hitched as the contained filth within was pushed up against her pussy.

"Oh, Big Mac~"

Reaching up, he hooked his hoof around the hem of Cheerilee’s panties and slowly tugged them down. The fabric gently peeled away from her shit-caked ass cheeks, taking away a small fraction mushy mass of waste that had spread itself all throughout them. Even as her underwear was brought down around her mid-thigh, an impressive lump weighed down its permanently ruined seat. With his other hoof, her husband brought the dildo up towards the mare’s thickly smeared pussy lips.

As all this happened, Pileup was already back in business at his desk, having regained his composure in record time as he watched the erotic scene transpire. Though he had yet to so much as touch his own shaft since cumming, the colt's cock was already rearing to go again, something duly noticed by the filly sitting next to him.

Cheerilee's yelped in alarm as she felt the smooth head of her favorite dildo suddenly lunge forward, penetrating her vulva with ease thanks to the wet filth that coated the shaft's entire length. Big Mac chuckled to himself as watched the mare’s anus twitch, clenching and unclenching as if begging to be given attention as well.

With a quick thrust of his hoof, the remaining length of the dildo speared through into Cheerilee's dripping pussy, spreading it wide as her flexing vaginal muscles worked to keep the welcome guest inside of her. Distracted by the blissful fullness she felt, she was caught off guard as two large hooves landed on the desk on either side of her head.

Tilting her chin up, she saw Big Mac grinning down at her, before feeling the telltale presence of another even bigger cock prodding up against her asshole. The heat of his body above her own was all she could really register before the stallion's hips promptly rolled forward and his crotch suddenly made full contact with her messy flanks.

*FRPTCHK~!*

“AAaah~!!” Cheerilee cried as her anus found itself being forced apart yet again. Thrusting himself all the way into her bowels, Big Mac grunted as he felt his wife's ponut clenching tightly around him.

From his desk, Pileup watched, now slowly stroking himself as he imagined being in Big Mac's place. As the huge stallion bore down on his teacher, rearing back for thrust after thrust, the colt's focus was drawn to Cheerilee's incredibly stretchy ponut. However, this did not last as he suddenly heard a noise close by that managed to pull his eyes away from the messy spectacle.

“Nmf~”
*Crackle~*

He was stunned to find none other than Sweet Flower bent over the side over her own desk, seemingly doing her best to mimic Cheerile’s pose with her flanks held high in the air in his direction and her tailed raised. While one of her hooves still worked tirelessly at her nether regions from beneath her barrel, the wet and sticky seat of her panties was slowly being pulled outwards. She was pooping her panties too, and from the look of it, she wasn't the only one. All around the room, solid waste and urine were finding their way into the seats of several foals' pairs of underwear.

Some, like Sweet Flower, made no effort to hide their uncontrollable urge to follow their teacher's example, displaying their 'accident's for all their classmates to watch. All the while, Cheerilee watched with lidded eyes as she gasped and moaned with each of her husband's forceful thrusts, her cheek pressed into the top of her desk as her tongue lolled from the edge of her mouth.

Suddenly, her eyes widened as a deep grumbling tremored inside her gut. Eyes flicking to the now-empty potion bottle sitting idle on the desk, she felt her abdomen tighten. It was finally taking effect.

"B-big Mac~!" She stammered in a vain attempt to warn her husband who was far too busy pounding her ass for all it was worth to hear her.

*SPRRRPT~*

"Mmff!" Cheerilee gasped, feeling a huge pressure pushing down through her bowels.

At the apex of yet another firm thrust of his cock, Big Mac finally noticed something was off as the tip of his dick slammed into something squishy and slick. Very quickly the sensation spread around the head of his cock as the rush of slimy waste from his wife's body finally began to ooze out around his pulsating shaft. As thick chunk after chunk fell down onto the desktop beneath them and into the already filled seat of Cheerilee's panties, his arousal only heightened as his thrusts came harder and faster.

Watching from his seat as his teacher began to shit once again, Pileup could take it no longer. Standing up from his seat, he turned to find Sweet Flower panting as she lay bent over the side of her desk, her whole body twitching as she underwent her third orgasm. Copying the motions which Big Mac had demonstrated in front of them, he yanked back the filly’s underwear, revealing the huge mess she'd already made inside them and the still-emerging log slithering through her cute little ponut.

Sweet Flower gasped as she felt him do this, looking back at the colt with surprise, though she made no effort to reject his advances. She could just spot his cock as he treated himself to an up-close view of her ‘accident’, her eyes tracking the bobbing shaft hungrily as it wobbled up and down between his hind legs.

Suddenly, there was a gasp from the front of the room. The dildo which has up until now remained embedded in her pussy had finally popped out, leaving her hole gaping and desperate for more. With a grunt, the stallion mounting her finally pulled his hips all the way back, allowing the dark brown tip of his cock to come free of her ponut with a satisfying 'Plorp~!'.

The stallion wasted no time in realigning his shit-smeared cock with Cheeirlee's vulnerable pussy as the mare braced herself for what was about to happen. Meanwhile, an inspired colt watched and followed along in preparation to thrust himself inside of his classmate, who was instinctively bucking her hips against him in eager anticipation.

A few sharp gasps and moans from elsewhere in the room briefly drew his attention. In the far corner of the room, a pair of foals were already going at it with reckless abandon. Slowly but surely, it seemed like the whole class was getting involved in one way or another.

With a wet squelch and a gasp of pleasure, Big Mac finally rolled his hips forward, the broad shit-smeared head of his cock pushing through the brown sludge that surrounded Cheerilee’s vulva and filling the mare's tunnel with his throbbing length. Cheerilee gasped sharply as he inserted himself, no longer caring even if Princess Celestia herself were to suddenly appear before them.

A yelp of pain and pleasure was heard as Pileup felt his cock crash forward into Sweet Flower’s virgin flower, his face twitching as every last inch sunk deep into the filly’s pussy. The walls of her vagina squeezed and massaged his length as sloppy chunks of manure continued to plop out from Sweet Flower's ponut. All the while, she continued to massage her clit with one hoof between her hind legs, barely aware of her own surroundings as she bathed in an ocean of never before felt pleasures.

She wasn't the only one, however, as Pileup's breaths were also growing heavier as raw instinct drove him, causing him to hump wildly as he raced towards an explosive finish. Finally, when it seemed like it couldn't get any better, he came. With three quick pumps, the colt shot his seed deep within Sweet Flower's pussy, letting out a moan of pure ecstasy as he emptied his balls for the second time today. He could feel her tight walls convulsing around his throbbing length as she came as well.

At the same time, a satisfied grunt from the front of the classroom came moments before a cry of pleasure from their teacher signaled a similar exchange between Big Mac and Ms. Cheerilee. Both Pileup and the stallion he'd been mimicking sighed in relief as they spent their loads, with the former suddenly overcome with a wave of tiredness as the strain from all his thrusting hit him like a truck.

Falling back onto the hardwood floor, his cock slipping free of Sweet Flower's hole, he leaned back against the side of his desk chair. Sweet Flower, on the other hand, remained bent over the side of her desk, having already passed out with a satisfied smile on her face.

Through labored breaths, Cheerilee lifted her head up off the desk to look out across the classroom. Almost every one of her students had gotten involved, and regardless of how things turned out by the end of today, it was all totally worth it~...