I'm not crazy about my future sister-in-law. She is several years younger than me and despite spending a lot of time with her (both alone and in groups), we just don't "click." My fiancé made it clear that it was an expectation of his family that I ask her to be a bridesmaid, and that they would essentially never forgive me if I didn't ask, so to avoid trouble I asked her to be a bridesmaid. Since asking, she has been very pushy and tried to make it all about her, and hasn't made much of an effort to get along with the other bridesmaids. My fiancé assured me that she would just be in the ceremony, and wouldn't have to be involved in any of the other stuff, but now he is concerned that if I don't invite her to the bachelorette and include her, she will be hurt. My friends have been planning an awesome bachelorette party for me, a girls weekend. FSIL makes everything dramatic and about her, and I would really rather keep the bachelorette just my friends. Do I have to invite her?