I've heard of women who abduct their own children, and flee the state. Men who empty their joint bank accounts, and flee with their girlfriend. Men AND women, sadly, who claim false child molestation charges, just to win custody.
My own wife developed another "voice." Seriously. It was not her normal conversational voice, nor her romantic (at least with me) voice, nor her angry voice or her sad voice or her professional (when she is at work) voice. When I heard her on recordings, talking to OM, it was a a completely different voice -- different tone, different inflection, different laugh.
It literally made the hair on the back of my neck stand up. I even played one for her, and she said "Who is that? That's not me."