Knowing the depths of the issue between her and my parents, I readily agreed. It will be more comfortable for all of us. I'll have to have another uncomfortable discussion with my parents in which I now "un-invite" them, but it's the right thing to do.
The discussion with your parents might be a bit uncomfortable. But, just explain the situation and how you feel that this is what you have to do right now. While they may be hurt initially, if they really love you (and they do - you're a parent so you know), they will understand and get over this. I suspect that despite being hurt/angry at first, your father will see this as you being a man. End result is, he will be very proud of you - I know I would be if my S ever had to have that discussion with me.
