So my FI has one brother and one sister. I have one brother. We know we want his sister and my brother in the wedding party but, both of us do not get along with his spoiled brother. He has been as mean as possible to me since day one. My parents cannot stand him and do not want him involved. The problem is that FI's mom wants everyone involved and I am afraid she will pull some sort of stunt (like her refusing to come or not letting FI's sister be involved). I have no idea what to do?!!?!?