My FI's stepbrother's wife hates my FI's bestfriend's wife. The stepbrother is a groomsman and the bestfriend is an usher in our wedding. My FI and I were under the impression that the BF/usher and his wife were divorcing so she wouldn't be at our wedding, we're now aware that this is not the case. We are 3 weeks from our wedding and we've been asked by my FI's family to let the bestfriend/usher know that his wife is not invited to our wedding for fear that the two ladies will cause trouble. Naturally the bestfriend/usher is not ok w/ this & will not be in our wedding if his wife can't come, which we understand. Right now it seems like the FMIL is against us and accusing us of chosing a friend over family. My FI & I feel like the drama between these two couples has nothing to do with us and should be put on the back burner for the sake of our wedding. We have the option of either ticking off 2 people (friend/usher & his wife) or my FI's whole family. Should we stand our ground and tell them all to get over it & possibly have my FI's stepbrother & his wife and kids not come to the wedding or should tell the Usher not to bring his wife which will cause him to drop out of the wedding?Thanks