My family and I have been invited to my neighbor's wedding. It is their second wedding, but their first legally recognized wedding, as they are a gay couple. My mom is refusing to go, because even though she likes them, and considers them friends, she has religious conflicts with their marriage. She told me she hopes they aren't offended that she's not coming, and I told her if her reason for not coming was because she believed marriage was between a man and a woman and therefore she felt she was unable to attend, then they have every right to be offended. I also told her she could hold her beliefs and still attend the wedding, besides it wouldn't be the first wedding she ever attended that she felt shouldn't happen for whatever reason. I'm really upset with her about this, and what am I supposed to say when they ask me why she didn't come?