[ABDL, Diaper Use, Soiling, Futanari]

"Mommy, what are we doing here? And why did you bring Morgan? Is she in trouble? Are we in trouble?"

Standing within Gudako's bedroom were three of her adorable Servants, each of them sharing a few traits between them. The most obvious being the fact that all three of them were meant to be a different version of Artoria Pendragon, the King of Knights. Even if none of the three was the actual genuine article.

The one that had spoken up was the Caster version that originated from a Lostbelt. In a sense, she wasn't really close to being the genuine Artoria. But she had the same sort of charm. Though you really couldn't pay attention to her charm if you were to just gaze towards her face. No, what really drew your attention was the extra thick diaper wrapped around her waist. That thick white padding, that almost immediately yellowed a little from having her Mommy look at her. Not because she peed herself, but rather because of the squirties being soaked up on the inside...

Standing at her side with a smile on her face was Artoria Lily. The younger and brighter version of the genuine Artoria, she was from a world where she didn't have to worry about the problems that were to come in her future. In a way, she was destined to follow her dreams without problems. Which rubbed off on the way she wore her own diaper. An extra large diaper that reached all the way down to her knees, which was because of the extra heavy asset hiding within. Just having Mommy look at her was enough to make the giggly Saber blush a little, and the subtle outline of her 'asset' tremble in delight...

Finally, there was the tallest of the three Artorias. Whereas the other two had been variants that were left rather happy compared to their original self, she was nowhere near as kind or as fortunate. She was Artoria Alter, specifically the large-tittied Lancer variant. And despite her attempt to look serious and threatening, it was incredibly difficult to take her anywhere near seriously. All because of the diaper that was hidden underneath her leotard, both of which were dangerously stretched out thanks to the obvious erection poking its way against the front of her padding.

"Thank you, Master." And at Gudako's side was her wife. The sister of the three Artorias, Morgan le Fay. The girl that had ruled over Fae Britain, and now having come to enjoy life as her Master's spouse. One of many, of course, and yet she believed that it gave her special privileges. Which was probably why she dared to go around without a diaper, unlike the other three. "I'm surprised that you went along with my request..."

Gudako grinned as she grasped ahold of Morgan's lingerie-covered rear, kissing the former Queen on the cheek. "You know what I like, Morgan. Of course I would love to please you. Especially if it means seeing my favorite 'Kings' try their best to prove their worth." The ginger-haired Master said, all while leaning a little closer to her spouse. "But are you sure that you can handle Big Girl panties? You know what happens if you end up having an accident..."

Despite having three versions of her Sister staring at her, Morgan couldn't stop herself from crying out in shock and shame as she felt that hand sinking into her rear. She could even feel her bowels trying to let loose. All because of how her Momm- Spouse had done her best to train her. But she was a Big Girl. for sure. "I-I do. L-Let's not focus too much on me. Let's focus on the contest at hand..."

Gudako's grin widened in turn, before she turned her attention back towards the Artorias. "Castoria, I didn't bring you here to punish you. Far from it. Your dear Big Sister, Morgan, suggested that you three should partake in a little contest. She wanted to know which one of you was the greatest Artoria. And I'm glad you all look ready to pack your diapers, because that's exactly what you're going to have to do to prove your superiority. That sounds fun, doesn't it?"

"A...Ahhhh..." 'Castoria', as the Caster Artoria had been nicknamed to differentiate her from the others, muttered as a bright blush worked its way across her cheeks. In fact, she could already feel her tummy rumbling. To think that Mommy and her Big Sis would do their best to make her pack her pampers. But that meant that it wasn't a bad thing. Even though she was the one that probably filled them the most on a regular basis.

Lily blinked a few times as she reached for the waistband of her diaper, stretching it slightly. "Mommy? Can these really fit all our poopies?" She asked, tilting her head slightly. After all, she wore these more so for the sake of 'Caliburn', which had started to tremble while she considered the idea of pooping so much that she would smother that big thing in inane quantities of poopy.

Lancer Alter blushed harder, all while her diaper stretched out an inch more. To fill her diaper would be utterly humiliating. But she had once challenged Mommy, and she had shown her the shame that she felt... It was an integral part of her existence. She wasn't allowed to be anything but a big diaper-filler. And if Mommy then wanted her to fill her diaper to complete that role of hers, then... "I... I'll do everything in my power to show that I am the greatest, Mommy." She tried to sound proud of herself. Proud of that shameful state of hers. And yet she was still stuttering...

Gudako had to giggle in response to the sight of the three Artorias dealing with the idea of filling their diapers this way... And the fact that Morgan had suggested it. Really, she had suggested that she should grab way more of her Sister. But there were only so many that Gudako wanted to play with, so Morgan had to settle for these three. It's not like she was going to be starved for shame or delight either... Because once they all started, she'd fall just like they would.

The devious Master lifted Morgan onto her lap and wrapped her arms around her, all while her own padded cock crinkled its way in between the unpadded girl's thighs. Letting her blush even further, all while the Master poked her head over her shoulder so the girls could still see her. "Alright, girls, it's time. Do your best, and make Mommy proud!"

With that, the informal contest had begun. And it was up to the three girls to prove their worth. So each of them started to do what would make them fill their nappies the best. Each of them had a completely different technique, and each of them really leaned into it. All so they could claim the win and achieve the glory that was on offer. But more importantly... Get the chance to climax hard from being praised by Mommy!

Castoria's method was incredibly simple. Due to her much smaller cock and how sensitive it was, she decided to get down on her knees and press her diaper against the floor. She could immediately feel the plush inside pushing up against her cock, and she could feel her pleasure spiking so hard that she almost ended up collapsing right then and there. But she knew that just collapsing wouldn't be enough. She needed so much more pleasure to truly win this bout.

So instead of giving in, she put everything she had into the act of grinding back and forth. Rapidly thrusting her hips against the ground, practically fucking the diaper. All while letting out moan after moan, drooling onto the floor as she thrust harder and harder. And eventually, as she squirted over and over again...

A whistle-like sound left her rear, the faint sound of gas from within. Heralding her hole spreading open just enough to allow the sludge to slip out. Her poop was incredibly runny, splattering out inside her diaper and immediately leaving it completely and utterly brown since most of it was soaked up by the diaper's extra absorbent material.

While Castoria did her best to cum so hard that she ended up messing, Lily went with the traditional method. She closed her eyes and pushed harder than she ever had before. She needed to push so hard that she would make Mommy proud.

Mommy always praised her whenever she pushed. And because she loved Mommy's praise, she always liked to just try and push out a bit more. It was why she was one of the first Servants that ended up in diapers. Although, she had always thought it was because of her enormous assets, so she never quite put two and two together. But she definitely pushed. Just as Mommy would want her to do. Over and over and over again, all for the sake of forcing out what was inside...

Only for her lips to part and a very loud moan to echo out, right as a massive serpent of shit forced its way out of her bowels. Coiling around inside her diaper as it quickly constricted her oversized assets. Squeezing around them, and forcing her to cum. Because despite how hard it was for her to grow erect, those assets of hers were definitely extremely sensitive. And... Goodness, it felt really good. Maybe she should do it more...

Lancer Alter did not focus on what the other two girls were doing. Because she didn't want to try and lose herself due to seeing them filling their diapers. They were their own girls. She was much more than a simple girl. That was what she thought, despite knowing that Mommy would tell her that she was just another adorable diaper-filling Baby...

"B-baby... Baby..!" Unfortunately, by trying to stand on her own... She had triggered her programming. Little by little, Gudako had made sure that the big and powerful Lancer was nothing more than putty in her hands. And that was through playing with her enormous shaft, and tying her bowels to her arousal. Every time she climaxed, she'd shit herself. And every time she did so, Mommy called her a Baby...

"Baaaabbbyyyyy!" Lancer Alter cried out moments after she started furiously stroking her padded cock, as the brassy sound of her bowels evacuating themselves echoed out. The powerful burst of gas was the only thing keeping her from packing her pampers heavily. So, so heavily that you could almost swear that it would leak over the edge, and out through her leotard. And yet she was still packing more in. Because she didn't focus on what she could do. No, she just focused on the sensations rushing through her. And her sensations told her that she should be making more and more poopy for Mommy.

Morgan watched it all. A single hand on her crotch. A single hand covering up her painfully tiny cock as it squirted over and over while watching them. But that wasn't why she was covering it. No, there was a big throbbing reason hovering close to her thighs, the true reason why she was trying to hide her cock.

"Just give in, Baby." Gudako said, as she kissed Morgan on the cheek. "You're just like them. A big... poopy... baby..." She whispered straight into her ear, emphasizing each word with another kiss to that beautiful cheek. Just because she knew that the big Baby couldn't resist when she talked to her like this.

Indeed, there was absolutely no way that Morgan could resist. Having Mommy whisper into her ear like this made her tremble all over, and the faint sound of brass echoed out through her rear. Then, the sensation of extra hot mush started to rub up against her rear, and it was painfully clear what she had done. Not just because of the smell, but because of the sound of her squirting into her lingerie...

As the three Artorias slowly came to a stop, each of their diapers absolutely packed to the brim, their eyes were all drawn towards the spouse on their Mommy's lap. And how much of a mess she had made. Almost immediately, their diapers each started to bulge. Lily and Lancer Alter's diapers more so, since they were actually endowed compared to Castoria. Regardless, all three of them were more than aroused just by the sheer sight of their Sister humiliated like this.

"I think the Baby needs to be taught a lesson. So let's put that contest on hold for now, dears. Come on over, and then you can all have fun with her." Mommy said, as she slowly lifted the extra stinky Baby off her lap, so she was forced to stand there with her filled panties still hanging there.

Morgan trembled and gasped as the panties fell down to her ankles just a few moments later, the weight of her mess too much for them to bear. Especially as she watched her 'Sister' approach, each of them ready for a different hole. Whether it was Lancer Alter moving behind her with that massive cock being forced up past the waistband, Lily immediately wrapping her arms around the poopy Baby so she could grind her own enormous shaft up against her... Or Castoria using a bit of magic to float in front of Lily, so she could tuck her diaper down slightly and reveal her pacifier-sized cock...

None of them really gave her a chance to prepare herself. Whether it was the two heavy-dicked girls slamming their shafts into her weak holes and immediately having her clench down on them as the juices started flowing, or her direct sister forcing her to suck on that tiny cock... They all just wanted their own pleasure. All because of her contest.

She knew that this was going to happen. And yet she didn't regret it. She regretted no part of it. Not Mommy calling her out like the Baby that she was, nor her sisters ruining her holes. It felt so good. So good that her painfully tiny cock, which was constantly getting stroked thanks to Lily's much larger cock beneath it, couldn't help but squirt all over.

All four sisters cried out in delight as they came together. Morgan and Castoria barely managing to squirt out a bit of useful seed, while Lancer Alter and Lily put out the real goods. Flooding her womb and her stomach so quickly that they were almost immediately forced out of both holes, because neither were able to handle that much cum plus their cocks at the same time.

And not a moment later, the sisters collapsed together. The dominants mostly having their cocks drool more cum as a bit more filth rolled out of their holes, leaving Morgan's pussy to push out so much cum while her poor ass shat out the liquid mixture of cum and filth, all while she kept on cumming bit by bit from the rush of it all.

Gudako just smiled at the result. All while chuckling a little to herself. Such messy Babies they all were. And to think they wanted to find out who was the best one...

To a Mommy like her, girls like them were all just Babies, and nothing more... Ehehe...