My fiancé's best friend's wife ("M"), who is not in the bridal party, is trying to interject herself into the wedding plans. I don't know what to do, and I'm nervous about my wedding day because of her. My fiancé's sister ("T") is one of my bridesmaids, and she is driving in from out of town to attend the wedding. The best friend's wife ("M) asked me where my fiancé and his groomsman (the best friend) were getting ready. I said I didn't know yet. She offered her house for them to get ready, and I said yeah that might work. And then she said "Well my friend is coming over to do my hair/makeup, so T can come here and get ready with me." And I said, "No, T will be getting ready with ME and the other bridesmaids." I hope I shot her down but I'm so scared that she's going to go behind my back and manipulate the situation to get T to get ready with her. I just booked hotel rooms today so that's where everyone will be getting ready. What if M shows up and tries to get ready with us??!!