Sorry for being a lurker, so i watched the 12th episode raw and there is good and bad news.
Bad: Diane does not grow instead she is thrown off a cliff and i guess she grows off screen because elizabeth already grew and we can just assume next episode Diane will be huge already.
Good: Elizabeth does grow indeed and whats weird is i dont remember a scene like that in the manga but of course i could be wrong.
Overall i'm kinda pissed i really wanted to see that growth scene with Diane that i enjoyed in the manga and i wish they didn't modify that scene! Out of all the parts to cut out edit they remove Diane's growth scene sigh... maybe next time