For the LN part... I haven't translated the light novel yet so it's not out, and the whole light novel (translated, ofc) will only be available to those who have either bought a physical or digital (ebook) copy of the light novels. This is going to happen way later, probably next year, when I finish more translation projects. But it's more like a tentative plan for now.
As for the last part: Alois also brainwashed her to think that if she doesn't play the role of Lila the protagonist, she was going to disappear. Her chapter (Chapter 23, Part 1 I think) says that she had a very traumatic death, or at least, a death that must have traumatized her enough to allow Alois to brainwash her. It's also somewhat heavily implied that Alois was using drugs on her as well. She was only made to think that she has to be with Edwin (not any other love interest, btw) because of Alois and Viola's brainwashing, because Alois needed to become the head of his family, as well as just get more power through Edwin.
