My fiance and I want a small wedding party. I want to have my 2 sisters and his 2 sisters be my bridesmaids, and he'll have my brother, his brother, and 2 friends be his groomsmen. My brothers wife feels like she is "one of my sisters" since she grew up an only child. I dont feel the same way, but I know she would be hurt if we didn't ask her to stand up. Her and I butt heads all of the time, and she tends to 'take over'. I stood up in her and my brothers wedding. My fiance and I really don't want to ask her, but know it will probably cause a lifetime of anger towards us. Any advice with what we can do?