YogiCinco: One thing you need to understand about sexual orientation is that it's not black and white. It is a spectrum. Sometimes, people who have always identified as straight find themselves attracted to someone of the same sex. Sometimes, people who identify as homosexual find themselves attracted to the opposite sex. It happens, but it doesn't mean that their previous experiences were any less valid. Sure, it is entirely possible that he is just doing this to rebel. But my suggestion is that you humor him, no matter what, because even if he is rebelling (which is unlikely in my opinion), he will come out of it knowing that he will always have your support no matter what.

It is really great that you are supportive of your son. Coming out to one's parents can be one of the most difficult things to do, especially considering the fact that he knows your family is Catholic. He really needs you right now. Tell your husband and daughter that he is still the same person they have always loved. He hasn't changed. And while they may disagree, they still should treat him with love and respect.