I am having quite a hard time deciding whether or not to ask my future sister in law to be a bridesmaid at my wedding. Me and my fiance have been together for over 5 years and recently got engaged. Me and his sister really don't have a relationship and she seems to not care much for me. I am always friendly to her and it seems that it doesn't get anywhere with her. She seems to think that I am going to take her brother away from her and the family. She is a little immature and she has strong opinions that she isn't afraid to share. Part of me wants to ask her to be a bridesmaid in hopes that it would help with our relationship and make her realize I have no intention of keeping her brother away from his family but the other Part of me feels that she will be quick to voice her personal opinion regarding everything. I don't need someone that is going to be petty in my wedding party and cause me an unnecessary amount of stress. I am also afraid if I don't ask her it may cause an issue with his family, I have plenty of girlfriends that I know would be happy to step up and be in the wedding. Any advice?