Reminiscent of a question Dave answered a few years ago. NO, do not have the right to be jealous. YES, men and women can be "just friends" while married to others.  Just because they're still friends after dating eons ago does not mean they have romantic feelings now.  They were friends before you came along and either you accept it or leave. At this point it's your issue not hers. I have a good male friend who's like my brother, and hubby knew this before we dated. No romantic feelings on either side and he's not gay. In fact he's almost more protective of me than hubby is. They respect each other and me.  This is the only way it works, so if you're jealous it won't.