Ok, this kind of happened to me already. I kept telling Fi he needed to talk to his mom and sister. That didn't work. They invited their friends and family but didn't invite any of mine. Not even BM's. WTF! So my mom and BM's are having their own. I just rolled with it. trying not to stir up too much water so close to the wedding. If I had gone into bridezilla mode. trust me I wonuldn't have stopped. And killed them all.
So I really feel your pain. Sorry. This sucks!