This thread made me find out my mom's real mom killed herself and she spent her childhood convinced her stepmom is her mom, which is why "she can no longer trust anybody".
Really, that's something that's of particular interest to me because it's such a phenomenon that creates insane and talented people. That's really interesting actually but I've only ever learned of it in reference to males/maternal. Ted Bundy had it happen to him, Eddie Vedder had it happen to him (pearl jams best album "ten" is largely about this, including one song where a "fictional' person has this same thing happen to them so they become a serial killer) and a few other insanely talented famous people who it's bugging me to remember.
There really needs to be a term for this, it used to be fairly common and screws people up. Fuck, it's gonna bug me who some other famous people this happened to are.