My future SIL and I are not close. I don't like her attitude and the way she treats her family. She wants to act like an adult but never takes responsibility for her actions. I still asked he to be a BM in my wedding though. But trying to include her has caused nothing but grief. One instance she cussed myself and my fiance out for childish reasons. I dropped her bridesmaids dress off at her moms and text her asking if she could try it on when she had some time. She came back acting like me asking that was making her have to bend over backwards. Saying that myself and my fiance are so called family but we didn't ask how she was after a wreck she had 3 weeks ago. (which my fiance did get in touch with her about) I was civil during the conversation saying I know she had a lot going on but she just kept coming at me with attitude and hatefulness. I've been to the point of tears dealing with her. I don't know what else to do and I really do not even want her in my wedding at this point.