

21 and 37 years old. A bit too young to be his daughter, but a “good” age bracket for his niece.
I mean, people can love and fuck (mostly) whoever they want, and this sounds like a typical groupie-story. I find it weird that the dude made such a big deal out of it which is a bit respectless, but punishing her for casual sex is where it gets really stupid.
Certainly enough, just highly unlikely. When you meet two people at these ages you probably won’t think they are father and daughter, right?