we are getting married next summer and we are talking about who is going to be in our wedding party. I have 2 sisters of who I have never really done the sisterly activities with and one of them I have a hard time being around because of how she is (it is a long story). I said something to my mom about using my younger sister but not the other one. She said if I use one I need to use the other one to be fair. Do I really have to be "Fair" with this? It is my wedding, and right now she stinks so bad because she doesn't have any personal hygiene and that is just the start. If I could get by with it I wouldn't even invite her. Please help.