Image imported from derpibooru
Original Description:

Fluttershy had a bit too much honey at Rabbit’s house… It was a tight squeeze getting in, but trying to squeeze herself back OUT was another story. Her newly expanded rump was wedged firmly in the small hole, flabby and squished in tight, she was jammed like a cork in a bottle…
“Oof-! Nugghh! MPH–!” She moans, struggling as she pumps her legs futilely… But it was no use. Fluttershy was stuck fast. “Oh no-! I- I’m stuck!”
She helplessly wiggles, tugging and shoving–! But she didn’t budge an inch. Her rump only jiggled in place, as she eventually falls limp with defeat. Her flabby stomach poking out of the hole… Her hooves droop down pitifully. Then suddenly–
“OOF-!” She gasps! A low grumbling stirring inside of her, she flushes bright pink. “O-Ooohh-! Oh dear–!” She squeaks, pumping her legs with sudden urgency! She shoved, and tugged, and pulled! But her plump body stayed put.
“Mpphh–! MPPHH! Oh-! Urrp-! Ooohhh…” She moans, the gurgling in her stomach growing… She felt heavy and bloated, the feeling only grew… More and more… As she did. Her butt and stomach inflating in size, her cheeks puff up until at last her hooves were wiggling wildly in front of her, unable to even touch the outside of the hole, to try and heave herself through!
“Urrrppp-! Mpphhhh!! Help! Ohh… I’m stuck! Oooo–! I’M STUCK! I- I need– I need a p-pull-! I’m getting b-b-bigger!” She cries, wiggling her backside helplessly, “I-Is anyone back there?! Ooooo-! Please!! I need a push-! Please push me out! Get me out of here!”
Her face twists uncomfortably, her constricted body getting more and more stuck by the second. She felt tight and strange, her face flushes brighter as the feeling makes her almost… Excited? The cheeks of her flank blush a soft pink, she pumps her hooves some more, hoping desperately for somepony to come push her free…