It was a regular sunny day, and Four was taking a walk around the outside of the contestant grounds. They were kicking up dirt and sighing, flopping down behind a nearby bush.
"Ughh.." Four picked a handful of grass and sprinkled it on their head. "Where's X? I'm bored." Four rolled over onto their back and flung their feet into the air, kicking a few times before sitting up and looking around, a bit of grass falling into their mouth. "Peh. Ughhhhh.."
Suddenly, they heard a sound come from somewhere behind them. They stood up and looked around, surprised, but found nobody. They shrugged it off and took a couple steps, surprised when they tripped on something unseen in the grass, falling down onto their face. They flipped over onto their back and looked around. "Ugh, what the..?" To Four's surprise, something green and slimy, seemingly made of a thick liquid, started to rise up from the grass and take shape. A strangely familliar one... It looked strikingly similar to a certain numeral... Wait.
2 big white orbs blinked open at the thing's head, and it smiled smugly. "Hello, silly boy!"
Four narrowed their eyes. "Oh. It's you. The slime thing is new."
Two laughed heartily. "It's a new trick I figured out! Limitless power has it's perks." Two gestured with their hand.
"Why are you here? These are my contestant grounds." Four snarled. "Are you here to steal even more of my contestants?"
Two laughed again. "Haha, no, silly! I'm here to give you a gift."
"A gift..?" Four's eyes widened. "Really...? What's the catch?"
"Of course! And there's no catch, cutie. I just wanted to do something nice for you, after I, y'know, kind of took over your show?" Two laughed nervously. "It's a surprise, but I can give it to you right now!"
Four tried to push down their curious excitement. "Well. I still don't trust you! Or like you. But give it to me!" Four smiled and opened their hands.
"Okay! Close your eyes..." Two said.
"Why...?" Four raised one eyebrow.
"Just trust me." Two said, smirking.
"Fine.." Four closed their eyes and held out their hands. Two giggled and reached out their arms, streeetching and wrapping around Four's two hands. Four's eyes snapped open and they struggled a little bit. "Wh-what are you doing!?"
"Just trust me! You're gonna love it." Two pinned them to the ground without even having to move, two more arms extending from their torso and restraining Four's legs.
"Whaaa..." Four squirmed around as Two got a bit closer.
"Now just relax..." Two extended one more "arm", which didn't have a hand attached to the end- It looked more like a tentacle with a rounded tip. "Open wide, Foursy!"
Four sealed their lips shut and tried to look away, Two nudging their mouth. "C'mon! It's really tasty.."
Two seemed to be telling the truth about that part.. The slime smelled like green apple candy, sweet and satisfying. Four let their guard down for just a moment... and Two immediately shoved the slime tentacle into their mouth and down their throat, filling their mouth with candy-flavored slime. It was... surprisingly good. Sticky, sweet, and easy to swallow... The taste was addictive.
"That's it! Good boy." Two smiled and got even closer, lifting them up into a slightly tilted sitting position using their arms. "Taste good..?"
"Mmfhh..." Four relaxed a little bit and nodded.
"Good! Now just relax." Two started pumping more and more slime down into their belly, swallow after swallow, their belly quickly filling up with thick slime...
Pump...Pump...Pump.... grrrnnnn... grooowl..... guuurgle....
"You're doing such a good job! Soon we'll have that cute belly of yours nice and full!" Two nuzzled their face into Four's cheek cheerily.
"Mmmm.." Four relaxed and swallowed obediently...
Suddenly, a voice came from behind them....
"Umm..... T-two..?" It was a squeaky voice belonging to a certain yellow variable..!
"Oh! Hello X. You walked in at just the right time! I was going to give you both your gifts seperately, but I guess it couldn't hurt if you got them together!~" Two giggled and reached out with another set of arms, pulling the nervous X close.
"W-whaa... What's g-going on here..?" X blushed seeing their cohost being pumped up full of slime.
"Oh! I just decided to pay Foursy here a little visit... give them a present!" Two smirked. "Now... open wide buddy..!"
"A-ahh..!" X opened their mouth, and Two gave them their own constant stream of sticky green slime. Pump...pump....
"Wow... you actually opened your mouth for me! So eager, that's adorable~" Two smiled, continuing to fill up both of their bellies... "I'm gonna feed you until those big tummies of yours touch each other...! Hehehe."
X's voice pitched up into a little whine, whimpering and squirming slightly as they felt their belly quickly bloat with heavy and gooey slime and struggled to keep up with the swallowing, squeezing their eyes shut and kicking their legs slightly, which were quickly restrained by 2 more of Two's arms.
"Good boyy.." Two drawled, bringing the two a bit closer together and rubbing both their giant growling, gurgling bellies... They had slowed down the swallows on Four's end until X could catch up to how big their bellies both were.
"You're just a couple of slime filled cuties! Look at you... No way you're fit for hosting anything, let alone a show as big as BFB or TPOT," Two thought aloud. "I guess I'll just have to take over the rest of your contestants too..!"
"Mff..!!" Hearing this, Four tried to struggle a little bit, their belly jiggling, but quickly gave up and calmed down.
"Heheh, struggle all you want, you'll never be superior to me!~ Cutie." Two smirked smugly, lifting the tentacle out of Four's mouth. "I think you've had enough for now.."
Four was filled to the brim, their giant blueberry of a stomach soft and swollen full and growling away... Their eyes were completely unfocused spirals, swirling around dizzily as their massive, soft belly swayed back and forth.
X finished off a couple more gulps before their belly pressed up against Four's, Two letting them catch a break... Their soft stomachs smooshing against each other and gurgling loudly. X whined and smiled goofily, belching aloud.
"Mmm.. All nice and full. My work here is done... I'll be taking over your show now too!~" Two dusted off their hands, satisfied and let go of Four and X's limbs. "To make sure you aren't going anywhere, I'll be back to fill you up again soon~ don't worry, I'll let you go after the finale! You two keep being cute together." Two started to walk away, but quickly turned around. "Oh! Almost forgot." Two reached out and pressed X and Four's faces together, making them kiss. "A kiss for good luck~ Heheh."
"Mh...." Four's face was completely red.
And just like that, Two was on his way, leaving Four and X dizzy, swaying bellies pressed together and full of sweet slime.

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inspired by someone on discord!! :D i hope you like this, first time writing slime inflation hehe. i like cheeky Two <:)