So what if she doesn't go? There is very little chance that she won't be thinking about y'all, even if she's not really aware of it.
From my experience, be very careful of your parents. Accept their support and their love, but don't let their hostility get to you. Remember, you are their little boy, and they will have to be defensive about "what she is doing to you".
My dad and I had a really rocky time when I was a kid, now he wants to be leader of my fan club. He was always enamored with W, now says he could never see her again without the posibility of violence. Parents are funny, don't let them get you off the track that you have chosen.