[Soiling, Pantypooping, Wetting, Futanari]

The Nishizumi Family. One of the most esteemed families in all of Japan, all thanks to the proficiency they've shown in the art of Sensha-dou. Every single female member of the family has performed beyond expectations and reached the higher eccelons of the sport with ease, letting them rake in fame and power thanks to their dilligence.

This was the case for the current generation as well. Maho and Miho, the young daughters paving the way with their own takes on the style taught by their family. Maho sticking to the more traditional style and keeping close to her Mother at all times, while Miho had branched out and begun to chart her own course using her friends and her allies. A stark contrast, but one that had earned her victory again and again.

Which left their Mother, the one that had taught them everything they knew. The one that had put them through grueling sessions of pure training to make sure they were on the path to greatness, so that they would not be able to shame the name of their family. Nishizumi Shiho. A stern Iron Lady, who shut away her emotions at almost all times. She believed that the road forward was paved with nothing but victory, and letting even a droplet of emotion out would serve to bring shame to not only the family, but the sport of Sensha-dou as well.

As it turned out, she was wrong. At least, when it came down to the clash between her two daughters. Which was why she was currently sitting inside the Nishizumi residence, a layer of sweat constantly running down her face as she was caught between an inner struggle. The struggle of fighting back against her very own well-nurtured nature, and the light of emotion that her daughter had lit inside her once again.

Seeing Miho succeed despite going against the main principles of the Nishizumi style, while at the same time incorporating every other strength and snatching victory, was giving the rigid woman a bit of an internal crisis. So much so that she had been experiencing a few... Accidents. All caused by a combination of the stress of leading a family in this day and age, the additional stress brought on by having to confront her own nature leading her to a devastating loss... And her aging body. Not that she would admit the last fact out loud. She was still a proud young woman in her own right. The slight bits of sagginess to her most delicate areas were not signs of aging!

Shiho trembled a bit as she sat in her room, the peace and quiet bringing her anything but. If anything, being all alone like this was a recipe for being forced to struggle against her inner self. Being forced to feel the strain of her original ideals clashing against the new ones that her youngest daughter taught her.

To make matters worse, whenever this strain started to pour through her, her bowels started to weaken more and more. She was lucky that nobody was currently home, since both Miho and Maho were off at their respective schools. Even if she had an accident, she'd be able to clean up and present herself as the Iron Lady regardless. Yes, she should just calm down and breathe steadily, so she could work on conquering herself-

"Mother, I'm home."

In that moment, when the door to her room opened and revealed the form of her eldest daughter, Maho, Shiho's expression turned from one of struggle to one that perfectly encapsulated her loss of control. Her eyes widening as she only just barely felt a warm gust of filth pushing out the hole between her cheeks before the most humiliating act of all took place.

The dark-haired matriarch of the Nishizumi family instictively slammed her hands down on her thighs to try and control herself, but all that happened was the accident accelerating. The sound of something inherently disgusting pushing out from her terribly tight anus and grinding its way up against her lace panties, quickly staining them and rendering them completely unusable for the near future. Not to mention how quickly that very same filth was staining her cheeks thanks to the filthy substance being forcibly pushed up against them by the tightness of the undergarment.

"M-Maho." Despite the fact that she had very clearly just shit herself, Shiho was doing her very best to remain strong. Even though she could smell how foul it was. The stress inside her was permeating through her own excrement, coloring her red with embarrassment. If she was as calm as her daughters, then perhaps this wouldn't happen. Or if it did, then at least it wouldn't smell so horribly. "W-Welcome home."

As she greeted her daughter like a proper Mother would, Shiho's body sprung another leak. One that made the dark-haired matriarch slide forward as she ended up with her hands on the floor, nearly bent over completely as she heard the quiet hiss of her own body betraying her. Not only that, but she saw the filthy golden liquid, her urine released from its prison, gathering in a pool down by her knees after it soaked through her pants. The fearsome Iron Lady of the Nishizumi family had not only shit herself, but she had pissed herself, just like an infant. Right in front of the daughters that had fought so hard to carry on her style of combat.

Maho didn't know what to say when she saw her Mother acting like this. In fact, she had hardly intended to go home this early. But there were issues with the Academy that meant she had to return home for an indeterminate amount of time, and this... This was the first thing she saw when she greeted her Mother once again?

The silence was deafening. So much so that Shiho's expression was on the verge of breaking down even further. What did Maho think of this humiliating display? If she had raised her correctly, it should be with utter scorn. That would explain why she had remained so silent. Waiting for the moment to dig in and ruin her Mother even more, once her own actions had done the talking for her.

Slowly, the dark-haired Matriarch looked up to see what kind of expression that her daughter had on her face. But she didn't get that far. Instead of seeing any sort of scorn, shame, disappointment or even acceptance, her eyes were caught on a very noticable shaft lifting up the young girl's uniform, parting the waves of her skirt and revealing the hidden masculinity that served as one of the Nishizumi family's greatest strengths.

"...Nishizumi Maho." That was all that Shiho needed to turn things around. Because if there was one thing that was more pathetic than a woman who couldn't hold in the contents of her bladder, nor the contents of her bowels, it was somebody that managed to get turned on by such a display. Especially when the one committing that display was from their own family. "What are you doing?" Her voice, which had been strained just moments ago when she greeted her daughter, was now barely constrained by the sheer disgust she had for her.

Maho's eyes widened as she realized what happened, causing her to snap to attention and salute her Mother, for fear of further retribution considering what she had been able to force upon her in the past. "Ma'am. G-Getting aroused by the sight of... T-The sight of..." She tried. But there was no way that she could admit that she loved what she just saw, even under the threat of punishment.

"What you mean to tell me is that you're a poopy pervert who loves to see her Mother ruin herself." Shiho cut her off when it was clear she wouldn't be able to finish. All while getting back on her feet, only mildly inconvenienced by the completely and utterly ruined state of her panties at this point. "My daughter. A proud member of the Nishizumi family. Is actually a poopy pervert who gets her kicks off watching others defecate themselves. Do you know how much shame that brings me, Maho?"

The younger girl did not know how to answer. Not even as her Mother came close enough to the point where the younger girl could smell the filth still cradled againts her rear. Not even as that very same woman pushed her against one of the walls of the room, trapping her between a hard surface and her rather voluptuous breasts. Breasts that had made Maho cum several times throughout her life thanks to the sheer wonder of their natural heft and size...

"You disgust me, Maho." Shiho said, all while looking down at the girl that was now trapped between her breasts. Her own shame was now secondary to the shame that her daughter brought upon her. "There's only one way for you to repent. Shit yourself. Now." She gave a simple command. A command that anybody could resist. But only poopy perverts would give in and do exactly what she said.

Maho let out a quiet gasp as she heard that command, before slowly saluting her Mother once again as her expression started to strain. That strain was quickly replaced with shameful bliss and an incredibly red set of cheeks as the back end of her strained panties started to stretch outward just like the front had. And the smell of her filth started to waft around her as well, though it was nowhere near as foul as her Mother's...

"M-Ma'am." Maho muttered as she tried to maintain her loyal posture. "I-I have shit myself, as you ordered." The more that her Mother was causing her to slide into this perverse aspect that she had been trying to keep hidden from anybody, especially her family, the more she was accepting it as a normal aspect of herself. Which made it much easier to do something so terribly embarassing as acknowledging the intentional filling of her panties.

Shiho's explicit disgust only grew. And yet at the same time, she could feel her own panties tremble a bit. There was something about the way that her daughter gave in that made her own cock, which she otherwise tried to ignore as part of her attempt to suppress her emotions, twitch and tremble in delight. ...Which would certainly explain where the girl got it from, but that only added to the shame she felt. Because Maho did not lean into what she had been taught. If she was truly able to inherit every aspect of the Nishizumi style, she would've chided her Mother while remaining control of her own arousal.

Slowly, she started to smile. Very well. If she had inherited this kind of behavior from her, and she only now started to awaken to it herself, then she would learn from it and teach her daughter in the same breath. So that she would understand exactly how to deal with a situation like this in the future.

"Maho." She said her daughter's name, causing the girl to immediately snap back to attention, a little bit of precum starting to drool from the girl's panties as well. "As punishment for what you've done, I want you to clean me. Fetch the necessary towels and a change of underwear. I'll be waiting."

Maho wasn't one to hesitate once she had been given an order. Especially one that let her get closer to her Mother's expansive and engrossing ass. So much so that she had almost disappeared by the time the order reached her ears, letting her Mother return slowly walk back to where she had made her terrible mess.

Shiho glared down at the piss that had already soaked into the floor. She would need to punish Maho for causing that in the first place. But first, she needed to teach her a lesson. And to teach her that lesson, she needed her change. A change she prepared fo by laying down on the floor in a dry spot, so her mess wouldn't start leaking down once again.

It didn't take long for Maho to arrive once more. Bringing with her... A set of panties that had been thoroughly washed in the past, and more wipes than one would expect her to have on hand. Which just made her lean harder into her true nature as a Poopy Pervert. Knowing her, that pair of panties was one that she had taken from her Mother's closet a long time ago, which had been carefully maintained to make it useful as some sort of masturbation aide.

"What are you waiting for?" Shiho asked, her hands laying flat on her stomach as her daughter approached with her body still shaking due to everything that had hit her thus far. "The longer you wait, the worse your punishment will be." The dark-haired matriarch made sure that her daughter would quit hesitating by hovering the threat of punishment over her head once more.

Maho gulped as her cock grew a bit more erect. The waste in the back of her own panties had thoroughly browned the garment at this point, and despite the fact she had ample opportunity to change herself while she went to grab the necessary tools to change her Mother, she kept wearing those very same stinky panties. Yet again proving just how much of a Poopy Pervert she was.

But even then, even though the sight of all that messy excrement packed inside her Mother's tight pants and making her butt dirtier and dirtier with every passing moment, she had to obey. And with the scornful gaze of her Mother bearing down on her, Maho grabbed ahold of the older woman's pants and carefully pulled them down, trembling every time she had to tuck extra hard due to the older woman's more than generous curves.

Shiho was hiding a bit of a smile. Seeing Maho try her best to remain utterly composed despite what she had just revealed to her Mother was... Well, it had made her tent her own panties. Her impressive 'cannon' was standing tall in the face of her daughter's humiliation, something that was only emphasized more once that dirty lace garment was taken off her. Seeing her daughter pause as she stared at her very obvious erection only made that smile turn a little more wicked as well. "Did I tell you to stop, Maho?"

"N-No, Ma'am." Maho muttered as she quickly did her best to ignore the signs that her Mother was no better than her, as she did everything in her power to clean up any traces of filth on the older woman's body. Whether it was carefully wiping that mighty cannon down to remove any traces of the sticky gold liquid that had almost broken her, or letting the wipes rub up against her Mother's pussy to remove the residue left behind by that same liquid, or vigorously rubbing at the browner spots on the older woman's cheeks to wipe away the stains of her own shit.

Shiho, enjoying the sight of her daughter working hard despite the humiliation, bit her lip a little to hold back her moans. This was supposed to be part of a lesson, part of how she would humiliate her daughter into never submitting like this ever again, but she was proving herself very useful and terribly thorough. If she kept up this level of thorough and vigorous cleaning, she might force her Mother over the edge...

Which was why the older woman reached down and grabbed Maho's wrist before she got too close to her anus. "That's enough, Maho. You've done well." A single compliment was enough to make the young daughter nod and back away, doing her best to dispose of all the dirty wipes and the garment that was still cradling that earlier mess. All while Shiho could see the trail of cum slowly drooling out of her daughter's panties and onto the floor. Another strike to add to further punishments. And another thing to think about, should she need to make her fall even deeper into this kind of perversion.

The final step, at least in Maho's eyes, was to fit those very clean and definitely not subtly cum-stained panties onto her Mother's rear. Something that took a suspicious amount of effort because she had to deal with the rather large erection poking forth from her Mother's crotch, and getting the back half around her rear took a good deal of effort as well, forcing the young girl to get her face all the way down to the floor before managing to snap the waistband back around the Matriarch's seat...

Only to then be used as one herself, Maho letting out a gasp as she was forcibly buried underneath those thick cheeks. She had only just been able to roll onto her back before it happened, forcing her face to press against the lace as she heard her Mother laugh ever so slightly. What prompted this? What was she abou... No. There was no way. She wouldn't do that after humiliating her so much over seeing it.

"This is your first lesson as a Poopy Pervert, Maho. Learn it well. This is what you do when you're confronted with somebody that discovers the depth of your secret!" Shiho cried out as she very earnestly started to push just like her daughter had. And instead of the strain she felt when she had to deal with two halves of her mind fighting against one another, the mess that quickly started to flow out of her hole and into the clean panties rushed out without any issue. Letting it cradle right against her cheeks as she pushed and pushed, her mess making those panties truly strain.

Maho was forced to gasp and get acquainted with the finer points of her Mother's scent, the texture of her shit, and more importantly the feeling of being shit on. A feeling that overwhelmed her far too quickly, resulting in the poor Poopy Pervert letting loose and crying out as her orgasm wracked through her body, her cum leaking straight through her panties as it shot into the air and then rained back down on her.

Shiho licked her lips a bit as she joined her daughter in climaxing, though hers was much more subdued as her cum drooled right through the front of her lacy panties. All while collecting in the exact same spot on the young girl's stomach, showing that the apple really didn't fall far from the tree.

Though she had been torn up by what her youngest daughter had done, she now realized that she had much more in common with her eldest than they both initially thought. And though they discovered it thorugh something deeply humiliating, there was something that could be learned from it as they'd get the chance to delve further and further into their mutual perversion.

But first... Shiho needed to pull a few strings. So their cannons could have a comfortable place to rest, and so they wouldn't have to clean up as much during their new way to bond as a family...