The preg expansion is pretty darn good! Although it seems to have a max size, unlike others... I noticed after a point that it wasn't getting bigger at all, but then suddenly there were sweat drop effects that were much bigger than the shown belly.
Viewing post in Aphrodite's Alchemist [Abandoned] comments
Ah, on a second attempt, I hadn't reached a "max" size... the pregnancy expansion just seems kind of slow. And having done both Lea's hard mode to completion and then going to Emily's hard mode, I'm somewhat wondering if having butt expansion disabled affected how the game decides whether I'd "won" the level or not.