[ABDL, Soiling, Diaper Use]

"I hope Mama Maria'll give me a change once I get back..."

The voice of one Valentine echoed out as she sat in her stinky diapy, the loads she had packed into her pamper currently dried out and stinking worse than when she pushed them out the first time. It's not her fault that she had packed lots into it on this mission either. She was forced to confront somebody much more dangerous than who she had originally expected...

As part of the Space Messiah Coalition, Valentine was tasked with exploring the cosmos as part of the Cupids. Her, her Mama and three other adorable babies, were a team. But even though they were a team, occasionally they were made to go out on independent missions. And since Mama was busy teaching the new kid, Ava, how he was meant to serve as part of the team... She didn't want to make her stop. So she decided to head out on her own, since the others were busy.

Big mistake. The planet that she had gone to was... Infested wouldn't be the right word. It was more accurate to say that the planet itself was one big entity. And it just so happened that not only was that entity maternally coded, resulting in her having a lot of difficulty truly trying to fight her, but it also sustained itself on manure. And considering the average output of a SMC Baby like her, it was no surprise that she would try to capture her and use her.

Valentine shivered in her seat as she thought about that massive Mommy. She was... Three times as tall as she was, and she oozed femininity, and just thinking about her... Just... Ah... M-Mommy...

Valentine's cheeks flushed bright red as she slowly moved her hand down towards her padded crotch. Despite what she had been through, her diaper managed to survive... And so did her outer suit, which meant that all of her stink and her poopy was trapped within a tight space. Which was both good and bad, but since she needed to relieve a bit of pent-up arousal like the needy baby that she was, maybe she could just... Mush it around a bit, even though it had gotten stal-

"My my. And what do you think you're doing, Buster Valentine?"

The dark-skinned girl's eyes lit up as she suddenly heard her comms roar to life, as well as a hologram of the Cupids' Captain Maria materializing in front of her. That padded matron that kept them all in check... That loving Mama that had groomed her to be a good SMC Baby..!

"M-Mama Maria, I-I-I-" Valentine stuttered uncontrollably as she was caught in the act of being naughty. It wasn't against the rules, but she knew what Mama thought of her getting naughty. She.. She wasn't meant to get naughty. At least not if Mama was near. Mama always wanted to be part of her naughty business..!

And thanks to her emotions getting out of control, and thanks to how intimidating Mama was whenever she looked displeased, there was only one thing that Valentine could do. And that was whimper as she felt her poor loose hole sloppily expel more waste from within her, as the back of her diaper started to sag a little more. Even though she was wearing her combat gear and the latex suit made sure to keep it all nice and compressed, her diapy had been packed so full that sagging was inevitable... Which would probably make many of the other Babies aboard the Mothership giggle as they saw her...

To make matters that much worse for Valentine, it was impossible to not notice the blush on her face as she pooped her extra poopy pamper. To call her pooped would be an understatement, especially with the slight trail of drool running down her chin. The only thing that broke her from her poopy trance was the sound of Mama Maria giggling at the sight of her. "S-Sorry, M-Mama. I-I... I know I did bad..."

"Mmhm, I know you know. You would never do anything bad intentionally." Maria said, as she reached forward, her holographic hand resting on the girl's extra packed pamper. "Which is why I'm not surprised you tried to play with yourself. You probably wanted to make big cummies down here, didn't you? So you could make me proud... And Messiah too..."

The thought of making Messiah proud... It actually made Valentine push out a little more poopy, which made Mama Maria giggle in turn. Which also made Valentine blush even harder. She was an exemplary SMC Baby, but that didn't mean that being teased about it didn't get to her. She was really, really not used to the praise, even from somebody so close to her as Mama Maria.

"S-So... Y-You're not going to punish me for going poopy and trying to rub down there..?" She tried to focus on the problem at hand. The fact that she had been caught trying to masturbate when she didn't have permission. Hopefully, Mama Maria would let her get off the hook.

Maria's hologram nodded, as she winked and giggled. "I'm not. I would never punish you for letting yourself lapse a little. Messiah would spank me if she found out, and not in the good way." She joked about the concept of being on the SMC's Mommy's lap and having that firm hand spanking against her rear, to the point where it almost looked like her diaper started to grow a bit soaked, despite the fact that a hologram shouldn't be able to pick up something that subtle. "Regardless, I'll be there to pick you up once you arrive back at the Mothership. And then we'll have a bit of fun together. After all, you did a mission all on your own. I did promise that you'd get rewards whenever you completed missions, didn't I?"

That's right. That was what Mama Maria had told her. The first moment that they joined together as part of the Cupids, when their uniforms were still plain and barely different outside of the colors that indicated when they had started to fill their diapers... She had told her that if she did a good job and finished her missions, she would get rewards. It was how she had become Mama in the first place. Mama treated her like her adorable daughter. Despite the fact that Mama Maria's skin was pale compared to the dark hues of Valentine's, she truly treated her as if she was her own flesh and blood.

"...C-Can we... Can we do that kind of play as a reward, Mama..?" Valentine muttered, as she pinched her thighs together. She... She really wanted to have that kind of fun with Mama. It would definitely wipe away the bad memories of being stuck as Mommy's little fertilizer... Stuck as a manure-maker for an alien that was currently being detained and transported back to the Mothership for research.

Maria tapped her chin, as she slowly let the thought roll through her mind. Only to then smile a few seconds later, as the hologram started to flicker. "You just wait and see, my little Valentine. Mama'll give you the best treatment a Baby could ever want."

And with that final message, Mama Maria's hologram vanished. Leaving Valentine to quietly stew in her stink as she wondered what might come next. All while her thighs pinched together a bit more, causing the front of her diaper to soak up the juices rushing out of her pussy.

Knowing Mama Maria, she would both love what she'd see, as well as feel utter shame...

---

"There's Mama's little Baby! Come on, come to Mama!"

Valentine wanted to shut the door leading to her shuttle as soon as she saw Mama Maria standing outside. She wanted to hide. And there was a very good reason why. After all, everyone that was currently in the hangar was staring towards Mama Maria, and they just couldn't contain their giggles.

What she had requested from Mama Maria was some adorable Mama and Daughter play. So naturally, Mama Maria had ditched her usual uniform... And decided to wear nothing except for a naked apron and her diaper. Which in turn made it seem like her 'Daughter' was actually her 'Wife', which... Was the most roundabout way of accomplishing that kind of play, and only served to bring intense shame to the girl's cheeks.

"That's Maria from the Cupids, isn't it?" "She's really living up to her reputation. Is that Valentine on that ship, or is it that new boy?" "The new boy definitely hasn't seen this side of her. It's Valentine, and knowing her condition..."

Rumors were already flying around the hangar, just from seeing Mama Maria dress like this. The redheaded matron didn't mind the talk, because a lot of it was true. The way that she treated Valentine was almost like a proper Mommy would. But she went above and beyond whenever she did such a good job. It was why nobody really batted an eye when she showed up like this.

Despite how expected it was, that brought no sense of comfort or relaxation to Valentine. In fact, because they knew she was one of the stinkiest babies aboard the entire Mothership, and what kind of treatment it earned her... Ah... She pushed out a little more from shame, didn't she?

With a blush on her face, and an extra heavy diaper pushing out between her legs, Valentine slowly but surely waddled her way towards her Mama. All while blushing brightly as she looked at her. It wasn't just that Mama showed up in such an erotic getup... But it was the fact that she was so welcoming at the same time. It really felt like a reward, which just served to embarrass her further. Rewards meant to shame a little SMC Baby like her... Which in turn was a reward and a show of status in and of itself.

As soon as she waddled all the way over to her Mama, she received a kiss. Right on those cute lips of hers. And Valentine quickly started to blush further, especially as she was suddenly lifted into Mama's arms. Which then prompted the surrounding crowd to start giggling at the sight. Which... Of course, made the young lady's shame rise even further. "M-Mama..."

"That's right." Mama Maria chimed. She knew what Valentine was going to say. But she just carried her in her arms. As coos and giggles echoed around them. From SMC Babies like Valentine, who each had their own caretaker... As well as the caretakers themselves. It was a show of pure affection and love that left them all a little envious, even if Valentine was currently filled with shame.

Valentine could feel all their eyes pinned onto her. She could feel the shame. The humiliation that came with having them all laser focused on her. It made her cling to her Mama. It made her hug her lots and even try to reach one hand up towards her mouth so she could suckle on her thumb. But Mama preempted her, pushing a pacifier into her mouth before she got that far.

"Silly little Baby Valentine." Mama Maria said, kissing her sweet and adorable baby on the cheek. "You want to avoid shame? Then don't suck on your thumb. You know what people think when you do that." She chuckled, and the blush on Valentine's cheeks flushed even brighter. Which just made her even cuter, which served to make Maria's heart tremble in pure delight.

She could remember the first time that she was assigned to work with Valentine. Before they even knew each other as Mama and Baby. They were the same rank, and Valentine was... She was competent, but painfully shy. It was thanks to Maria that she was able to put her skills to use, because the comfort of being taken care of was just the right incentive. Even if she teased her every step of the way.

The trek through the main area of the Mothership felt like an eternity. Even though most of the other inhabitants just giggled and otherwise cooed in delight at the sight of her. It was too much for Valentine. But as long as Mama Maria was there... She would try her best to keep stable. Which was why the sound of her suckling on the pacifier kept echoing out. She was coping... Trying her very best to relax.

Thankfully, it was over faster than she thought. And not a moment too soon. The comments about her stink were starting to crop up. If they were going to tease her about being a stinky baby, she wasn't sure if she was going to be able to handle it.

"You did very well, Valentine." Mama Maria said, as she slowly lowered the girl onto her feet once again. All while the elevator that would lead them to Maria's private quarters quietly hummed, and the light shone in through the tiniest gap in between the doors. "I received information about what you were up against. That Mommy-raune... We're going to have to study her very well, so she can be of use to Messiah. Who knows, maybe you'll even get to turn the tables on her."

"D-Don't... Don't even joke about that." Valentine muttered as her pacifier popped out and hung around her neck. She wanted to forget everything about that manure maniac. Even if... Even if the idea of her being a Mommy for once actually did sound nice. She knew she didn't have the chops for it, as evident by the time she tried to baby Mama Maria in one of their reward sessions. But... Maybe she could use the training, so she could give Mama a time she would never forget.

The thought was put to rest as the doors opened, and Valentine saw the room that she had grown so accustomed to. Mama Maria's special playground. A room dedicated to young SMC Babies and their caretakers. While it was mainly owned by Mama Maria and used by the Cupids whenever they had earned a proper reward, it was also where Mama Maria personally trained potential captains once they had gone through the proper procedures. Her, and the other existing Mamas, even a few of the Papas too...

As soon as she stepped inside, she felt her uniform disappearing. The nanobots that made up her outfit, state of the art and developed by Messiah, immediately registered what kind of room she had entered. And as a result, it altered itself to look more fitting. Going from that stuffy uniform that was much better for combat, to something more relaxed. Like a simple onesie themed after her uniform. Red, black, and nice and snug. Very easy to open up too, which would be very useful considering-

*POP*

Valentine blushed as she felt her diaper slam into the floor. The buttons that had been stressed due to the weight of her mess immediately popped off once her outfit fully took form. And as a result, her diaper had a way to expand to its proper size, even if it was forcibly squeezed into a tiny hole. As a result, she couldn't move another step. The poor girl was stuck sitting on her extra poopy pamper, all while Mama Maria continued to giggle at her predicament...

"You really did mess a lot due to her. It almost makes me jealous. Maybe I should inquire with the babies in the tech department, see if they can make me look like that Mommy?" Mama Maria chuckled as she stepped inside, the elevator quickly retreating as they were left all alone...

"N-No. M-Mama's..." Valentine muttered, trembling a little as she felt the shame force her to wet herself a bit. The obvious hiss echoing through the air. Mama really knew how to put the pressure on her. "Mama's the only Mama I want. And Mama's... Mama's the best as she is!"

Maria let out a relieved and delighted sigh. "Of course I am. Just like you're the best Baby that a Mama like me could ever want." Mama Maria said, as she gave the adorable girl a hug. Right before putting the pacifier back into her mouth. "Now, let's give you a change. As much as I love to see you waddling around, I want you to mess a fresh diaper. So I can really tease you over making stinkies."

Valentine didn't even try to resist as she was laid down on the soft padded ground, nor did she try to stop her onesie from disappearing so Mama would have an easier time changing her. She really did make huge stinkies. So huge that she couldn't believe the sight of it. It was... it was even bigger than the last time she ended up stuck all alone. Was it bigger than the bed..? No, but it was definitely... excessive.

The smell was rather bad as well, but it didn't really matter to Mama Maria. She was used to Valentine making big stinkies. So she just took a deep breath and started to undo the tapes that kept the diaper held together. All while giving the girl a kiss on the cheek for doing such a good job. She really was her priceless little baby girl. As much as the Cupids hadn't been able to advance through the ranks, she would never not be proud of her.

Valentine gasped as she felt the diaper leave her hips. The weight difference was immediately noticeable. But at the same time, it made it really hard to move her legs. But that was natural. SMC Babies like her were used to having extra heavy diapers due to the nature of their incontinence and their missions. So having their legs uncovered was a rare experience, and one that they barely had a chance to grow used to. As a result, all she could really do right now was swing them around. Not that she had to walk around or anything.

No. She still needed to be cleaned. And Mama definitely had to clean her thoroughly. After disposing of her diaper through a simple pail-chute that led to the Mothership's ship-wide pail, Mama Maria went to work. Carefully using several incredibly wet wipes to slowly rub away at the problem areas.

It was an arduous process. Especially since a lot of that poopy had started to harden against her butt. But Mama Maria had rinsed dirtier butts than this. Including her own, when she still had self-grooming permissions. All that she needed to do to fix up a butt like this was just be a bit careful, and then everything else fell into place bit by bit.

Of course, Valentine was still moaning. Mama Maria was rubbing her very sensitive butt, and her incredibly sensitive inner thighs, and especially her wet and leaky pussy that was definitely still a little trembly after all the pleasure she had gone through. So much so that rubbing her wipe up against that hole...

"My my. You're squirting just from being cleaned? Maybe I need to put you through basic orientation again, you naughty little Baby..." Mama Maria chimed, as she returned the favor of nearly being sprayed in the face by Valentine's sticky love juices by rubbing a little harder...

And before long, Valentine was driven to a climax. Sure, she made a mess of the padded floor underneath her as the juices quickly started to run down her thigh. But at the same time, it was exactly what she needed. She had been starved for a proper climax ever since she fought the Mommy-raune. So having Mama give her one... It was just what she needed, and exactly what she craved.

"There. It feels good to be a naughty baby when Mama's there for you, doesn't it?" Mama Maria chimed, with Valentine weakly nodding in response. Just what she expected her to do. Now, let's get that diaper on you. So you can start filling it. You are your Mama's adorable Baby, after all."

Indeed, she was. And she knew exactly what Mama liked. So she didn't struggle, though he really couldn't either, as she felt the diaper slowly slide under her rear. It was... It was beyond comfortable. It was the softest garment known to man, and every single member of the SMC was mandated to wear them. Both for their own protection, and for fashion. Messiah made sure that they were super stylish too...

But the diaper she wore right now, for her play with Mama Maria? That was nothing but a plain white diaper. Just as Mama Maria liked them. And she knew that Valentine liked them too, considering she could already feel the crotch of that diaper growing nice and damp as she patted it. "Already getting naughty. What a naughty, naughty Baby you are..."

Having Mama Maria tease her like this was enough to make Valentine moan, even as she slowly but surely managed to get up onto her feet. She did it, all without Mama's help. All because she knew what Mama wanted. She always knew what Mama wanted. As soon as she ended up in a dry diaper, she couldn't be allowed to stay in it. Because Mama would disapprove of it. So the first thing she had to do whenever she ended up getting a change...

It was to push. All while Mama watched her. All while the most important eyes remained on her. The one person she never wanted to disappoint had certain expectations of her. And that meant... That meant that she had to make extra big poopies in her pampers..!

Valentine's dusky cheeks turned nice and red again as she pushed, and before long the sound of her crinkly diaper expanding echoed out. She could feel it pushing out lots and lots. All while she trembled. The sensation of pooping herself felt so good... It always felt so good...

Especially as Mama Maria gave her a helping hand. As she kept pushing out more and more of that massive mess, Mama pushed her hand up against her rear. Pushing against the mess that she had made, mushing it around inside that diaper. Which just served to make it rub up against her pussy. And once it had started rubbing there, it just kept on going. Mushing and smushing around until it had filled every crevice of the diaper.

The pleasure was mounting. All while Mama continued to watch her. So naturally, Valentine kept pushing. She kept on letting more of her filthy poopies slide out, as her diaper grew heavier and heavier and expanded more and more. Pushing out her legs as it quickly started to reach the same size that left her so overencumbered.

"What are you, Valentine?" Mama Maria whispered into her ear, as she caressed her cheek. All while smiling. All while putting those expectations on her. If she kept doing that, there was no way that she could resist giving her the exact answer that she wanted. It was just utterly impossible..!

Valentine gasped and panted, as Mama pushed her hand straight into her crotch. That was enough to push her over the edge, as she cried out and screamed at the same time. "I'm Mama Maria's Naughty Baby!" She cried out, collapsing onto her extra poopy pamper. All while a bit of drool ran down her chin again. Pooping herself this much, as well as admitting she was nothing more than a naughty baby... It was all too much for her.

But Mama was there for her. Mama Maria giggled and kissed her, hugging her nice and tight. All while slowly caressing her, and making her heart relax after having beat so rapidly over the last few minutes. It was so intense, and yet it felt so good now. She didn't have to worry anymore. She was with her Mama. And when she was with her Mama, everything would be okay...

Mama Maria would always take care of her... And in turn, her Naughty Baby would continue to make her proud...