Is it normal to be having sex with my guitar teacher?

Ive been taking guitar lessons from him for over two years. Im 19 and hes 39. I had a broken engagement 7 months ago and he was divorced a few months ago and we starting having amazing wild sex. Weve been flirting a bit since his divorce and we finally gave into our desires. I mean, sex has never been so good and fufilling, id rather do him than a guy my own age. Is this wrong?