Wifes Lover

My wife has a lover, he's 20 and fucks her most afternoons. I know about it and she now realizes I know and approve. I eat her out after he fucks her. What she doesn't know is that I fuck him! I've been fucking him for 3 years. It took 6 months before I got it set up right that she would let him fuck her. I know that several times he's fucked her with my cum still up his ass.