What to do with his wife?

My husband's friend of 25 years / subsequently my friend now and I adore him - just got married to the biggest ****** of all time. She is rude, condescending to him, very arrogant, egotistical and inappropriate. He was one of those guys that felt he should have already been married because he was 32, and she was one of those girls that wanted to get married for the same reason. Now they are together, constantly fighting, yet claim to be happily married. The thing is they want us to go out with them, and we can't see him without her, but I CAN'T STAND HER - AND NEITHER CAN MY HUSBAND!!! What do we do??