"Jeff? How did you... How are you so small? And why were you in there?"
Jeff, unaware of what to say, stutters out "I-I don't know! I was sitting on m-my bed, and then suddenly appeared in there!", silently praising himself for his last-minute lie. It was partially true though.
"Alright then... Although, I can't let you run around at this size! You're so small, you could get stepped on! Though, where should I keep you..."
After thinking for a moment, Diana decides that the best course of action would be to just keep him with her, for protection from being stomped. She decides to put him on the back side, since it's less likely for her to crush him herself.
She pulls him around back, pulling out the waistband. "In you go! *Giggles*" Diana lets go of him. She closes the diaper up, and due to the snug fit, Jeff falls in between her butt cheeks.
Diana didn't seem aware of it, but Jeff could tell she needed to go. Worse, he was stuck right in the line of it; Any log would hit him.
---------- Two minutes later ----------
Jeff could physically hear it getting worse. The cheeks around him clamped shut, and he felt like he was gonna be crushed. Diana still didn't seem to know; She was sitting down, based on what Jeff could see, so this wasn't going far.
Then it came. He saw the hole twitch in front of him, and immediately smelt it as well. "I'm gonna puke..."
Jeff tried to close his eyes, so that it wasn't as bad. It didn't help much, but when it came out, he barely held back from puking as the poop caused him to fall down to the bottom.
Jeff was now under the pile of poop, and could feel the weight of it as it continued to stack...