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~...’