A Turbulent Tum
Belly torture, rapid expansion, micro i.e. G/t, bellyaches and noises, inflation, etc. A tiny’s sadistic keeper forces him to drink a ton of vinegar and chase it down with a whole bottle cap full of baking soda, then sits back and enjoys the results.
“P-please, I don’t think this is such a good ide--” The tiny’s plea is cut off by another sudden swell of his tummy as the human quite forcefully squeezes the eyedropper in his mouth, shooting a harsh stream of vinegar right down his throat and all the way into his little stomach without him even swallowing. He moans and rubs at the grape-sized swell when the human pulls the eyedropper out of his mouth for the second time, feeling much too ill to attempt to stifle the sour, sick burp that almost immediately follows, the air that the human squeezed into him with all the vinegar rising to the surface of his liquid filled stomach.
He realizes with horror that the big hand is dipping the eyedropper back into the bottle towering a few inches away from where he sits, and when its owner stops squeezing the bulb at the end of the plastic pipette, vinegar climbs all the way up and fills every inch of the tube. Surely he can't expect all of that to fit in my tummy! I'll burst!
“Please--” He begins, shaking his head and protectively wrapping one arm around his bulging midsection as he scoots backwards with wide eyes. The vinegar in his belly audibly sloshes with the movement, weighing heavily inside of him. “I can't hold that much. My tummy's too full! I'll pop if you put any more in!”
“Nonsense,” the human coos, gently ruffling the hair on the top of the tiny's head with one fingertip before softly caressing the curve of the tiny’s ripe, flushed little belly. “You've got lots of room left in there. That belly's just begging to be filled. Think of how nice it'll be to feel so big and full.”
“It hurts,” the tiny whimpers.
The enormous hand ignores him and holds the end of the pipette up to his mouth. “Open up, now.”
The tiny whimpers but does as he's told, opening his mouth as wide as he can to fit around the end of the tube as he prepares to suckle. He doesn't have a chance to, however - an abrupt squeeze of the bulb shoots it all directly into his stomach a second time, making his tummy abruptly expand in all directions and strain like an over-ripe fruit tight and fat with juice. He cries out in pain and rests both hands on the sides of his gut with a little wail, rubbing pathetically even though he knows it won’t do any good.
“There you go,” says the human, again petting the top of his head, then stroking the bulge of his sloshing belly. The giant's finger moves to his belly and he desperately tries to scoot away only to realize that he's too enormous and heavy to budge. The fingertip runs along the taut surface of his gut, lingering over his tight-stretched bellybutton. “All done with your drink. You must feel like a little water balloon, don't you?”
“I'm not surprised. That’s unfortunate, though, because I still have a little treat for you. You have to eat it fast, though.” He very lightly presses his navel, making its contents audibly blorp and slosh inside of the poor tiny, who bites his lip unhappily.