holding out.

Any married people out there have sex dreams about other people beside their spouse? My husband told me he had a sex dream so I made it a big joke and said who was the slut you were dreaming about? He laughed and said for real it was you  he said he never has dreams about anyone else. I was trying to make him feel better so I told him you can't control what you dream. I told him I have sex dreams about other people. Well big mistake. He won't openly say he's offended but he will not have sex with me. He just keeps making it a joke and says to go have a dream instead. How do I fix it???? Help!