When I was 17, one of my friends’ step-mom was very hot - and 19.
IOW, this sort of thing is not necessarily as crazy as it sounds on the surface. I’m not commenting on the morality of it, though...
So your friend’s dad married a 19 year old girl, somebody young enough to be his daughter? Wow.
Well, if she was hot, I guess we can see some of what the dad saw in her. But I wonder sometimes, what does the girl see in the older man when they hook up with somebody so much older?