I talked to my parents again about this last night and told them how his mom was apologizing like crazy and neither of my parents believed it was genuine. They both pointed out that she wouldn't have acted like that in the first place if it wasn't her true personality. There is no excuse for being that insulting to a person. She is far from perfect, and for being such a religious and church-going person you'd think she would realize it is not her place to judge anyone.
Oh well, I want to be with him and he wants to be with me and I am not letting his mom get in the way of us. Like so many people have said, we need to make a life for ourselves, not just to make our parents happy. And I think I've gotten to the point where I don't care anymore if she likes me or hates me. As long as she can hold back her insults, I'm just going to keep living my life (hopefully with her son!)