Yeah, I knew about that bleach, but do we know yet what made her start killing when she did? Why not earlier?
I have this theory. I don't think she woke up one day and started killing people who use bleach .
I think Natalie fantasized about the whole situation for a long time (maybe like a sexual predator)and for some time the fantasy was enough to keep her calm and functioning (in the bleach using world) But then her fantasy wasn't helping her any longer and she went on and built her first miniature . Now she can "touch" her fantasy and literally "kill" the victim over and over and over again . And then she wants the real deal