He decides to go back to when he found her the cutest, eight years old. "Alright... I'm gonna set you back to eight. You alright with that" She stuttered slightly when she responded, "S-Sure, I-I don't m-mind."
With her response, he puts in the change, and hits confirm. Once he hits the button, he can instantly see the area around him expanding, the extra space obvious. "W-Woah! That's fast!"
The pubic hair above her pussy went back in, and it shrunk around him; He focused on her lips, seeing how they shrunk with her. She quickly had to sit down to stop her leggings and diaper from falling down, being far too big for her. Her bra fell right down around it, and with her oversized shirt, Jeff could see right up to her shrinking breasts.
It didn't take long at all; By the next minute, her chest became flat, and she shrunk over a foot. Her clothes adjusted last, the diaper shrinking around Jeff and providing very little breathing room against her childhood crack. "It's so small!"
He didn't feel her leggings tightened against him, and he got curious. "Wait, Em? What all are you wearing now?" She seemed to be exploring her new outfit, as it took a moment to respond.
"Well... I appear to be wearing a nice pink frilly dress, with it just looking like a bra sewn onto a skirt." He forgot how high pitched her voice was at that age. "And, looking under, it appears my uhh... diaper... is still pretty thick, with a pawprint design on it." She giggled as she finished, which Jeff found cute.
"Well, that sounds like a cute outfit you'd have there! I'd love to see it, although I'm currently down here, where the only thing I can see is your uh... bits." She sounded embarrassed as she continued. "P-Please don't do anything to me down there without asking..." Jeff couldn't help but note how innocent her voice sounded, despite how she truly was.
"I won't, I won't. Or, I'll try not to, at least; I have to squeeze my hand in front of my face just to not accidentally bite you when I talk... Also, by the way, I hit the reality shift feature on this change. From what it says, everyone should see this as normal." "W-Well, that's nice! A-at least I won't need to worry about any questions!" She giggled again.