I'll let a psychologist explain it:So, her lies are some odd coping mechanism for her, and she's desperate to convince herself it's true, but I wonder why a made-up story about being raped as a kid is part of that. Of all the things for someone to wish to be true...
After listening for almost twenty-five years to the stories my patients tell me about sociopaths who have invaded and injured their lives, when I am asked, “How can I tell whom not to trust?” the answer I give usually surprises people. The natural expectation is that I will describe some sinister-sounding detail of behavior or snippet of body language or threatening use of language that is the subtle giveaway. Instead, I take people aback by assuring them that the tip-off is none of these things, for none of these things is reliably present. Rather, the best clue is, of all things, the pity play. The most reliable sign, the most universal behavior of unscrupulous people is not directed, as one might imagine, at our fearfulness. It is, perversely, an appeal to our sympathy.