I know this is dead, but someone might pick it up again, I dunno, this is here for them:
pls, someone lock/limit spine movement when her belly inflates. Games having the belly collapse into a pile of jagged vertices whenever they bend over drives me insane. It really just kills my interest in playing the game at all (on top of the grind, oof.)
The best way to fix it IMO is when there's a "belly bone" that helps keep the belly's shape. That way you can also have it sag if it's full of something heavy, or rise if it's full of helium, but retrofitting the models for an extra bone sounds like a pain.