My blog was found by this search. I’ve never heard of this situation before, but it’s not really surprising. The early phase of puberty takes place before the internalization of incest taboos. Psychopaths live there, at that phase.
Blackmail is simply a huge problem. Psychopaths love it, if it’s successful it’s a crime without consequence for the perp, the victim is drawn into the crime. The victim by protecting themselves also protects the blackmailer.
I don’t think this situation will end well. Dads aren’t slow, males are geared towards recognizing female infidelity and a partner’s lover — if they all live in the same home . . .
I certainly hope she doesn’t consider justifiable homicide, heck no, nosireebob, that would be a crime, not to mention wrong, just wrong.
Sex at point of blackmail is really rape. We’re not talking jerks, we’re talking guys who’d rape their mothers.