IMO, her having a personality disorder is a copout. You don't have to put much thought or effort into character development when they don't remember anything. Plus, escalation is the bread and butter of any good incest story. So when the mom is ready to fuck him one minute, then she's a protesting prude the next without a sense of irony, you're going in circles. Her amnesia cancels out the moral degeneration process and that's supposed to be the best part.
Also, I'd rather she just be a pervy mom who wanted sex with her son from the beginning. But apparently this isn't going to be that either.
Also, I'd rather she just be a pervy mom who wanted sex with her son from the beginning. But apparently this isn't going to be that either.