All the talk about Psycho Ami.
1) It's been established that Maya doesn't know as much as she thinks she does. The whole trial and error of why Ayane's started making it to the rooftop being an excellent example of that. She's identified a pattern, but she also has a very limited data set to work with, given that she has experienced exactly one cycle that didn't end within 3 resets and we're approaching our sixth.
2) She indicates that informing Ami of the resets always triggers her, but that simply means that in %100 of the instances where Psycho Ami appeared, Ami had found out about the resets. She may be falsely equating correlation with causation.
3) We have seen a steady drift on Ami's behavior towards dangerously obsessive behavior. The first invite-over scene for each girl tends to be more angry than the last, the Noriko closet scene, etc. This indicates a progression towards Psycho Ami is likely inevitable. Once again, a limited data set enters the picture, as Maya hasn't seen what happens where Akira builds his harem for this long (increasing the liklihood of a catastrophic mistake).
4) There's likely not a single given switch, it's most likely that Akira being Akira slowly nudges her in that direction, while telling her about the resets is more of a shove. Both jeapordize the perfect world she's trying to build for herself.
5) I suspect Psycho Ami is the only true Ami, and the sweet "real" Ami is just a mask she's otherwise very good at wearing. She is a cuckoo after all. Her primary purpose is to push all the other chicks out of the nest before they hatch so that she can siphon all the love and affection from Akira for her own ends, whatever those might be.
