My fiance's brother, Chris, has just recently come out as transgendered. My fiance obviously wants Chris to be a part of the wedding party, but Chris has not begun to dress or try to "pass" as a woman, so we are not sure what kind of outfit she would want to wear. While I have no problem with Chris being in the wedding party, my entire extended family is very religious and likely to be intolerent of the trans community. I am worried that if Chris does decide to wear a dress instead of a tux there will be a large backlash, and since Chris is also autistic, that would likely be just short of diasterous. I am really out of my element here. How can I tactfully address this very touchy subject while making sure Chris stays safe?