Hotter still are the times that she fucked him and never told you about it at all. Come on, you know it's happened; you thought her pussy was juicy because she was happy to see you. She didn't want to tell you it happened again and humiliate you. And even hotter (for her and us at least) is the other guy she's fucking that you have no idea of. (Actually, she doesn't care how much she humiliates you.) That makes you a real cuckold, not just some guy playing hotwife.