My fiancé and I recently got engaged after 4 years together. My fiancé has two sisters, let's call them Suzie and Katie. Suzie is wonderful. I enjoy spending time with her, find her to be great company, and feel privileged to have her in my life. Katie, on the other hand, I am uncomfortable around. She is rude to everyone around her, and constantly berates my fiancé when we are visiting his mother's house. Additionally, two years ago she made it very clear she didn't want me at the family Christmas, and it really hurt me. Perhaps I am being too sensitive about that incident and should let it go, but I can't help how hurt I am about it.
I realize that it is traditional for a bride to ask her fiancé’s sisters to be her bridesmaids. My fiancé and I are in no way a traditional couple, nor do we plan to have a traditional wedding. I also just absolutely did not want to have Katie as a bridesmaid, since she would likely just upset me and cause drama, and I felt that Katie and Suzie were a package deal.
After I announced my bridesmaids, my future mother-in-law called my fiancé to brow-beat him about how insulted the family is about my decision to exclude his sisters from my bridal party. She explicitly stated that Suzie in particular was especially hurt. My fiancé defended my decisions to his mother and gave her my reasoning, which she dismissed as things I need to let go of. I was honestly only upset that I offended Suzie, so I called her and told her why I didn't pick her to be a bridesmaid. Suzie said that she totally understood my reasoning, was in no way offended, and my future mother-in-law had lied to my fiancé but Katie was very offended by being excluded.
My question is, where do I go from here? I am very upset at the fact that my future mother-in-law is questioning my decisions as a bride, especially since she lied about it, but I don't think that I should confront her. This whole thing is a giant mess. Your advice would be much appreciated.