I have two sisters: a half sister, much older than me, who I am very close to, and a full-sister two years older, who I don't get along with at all. I plan on having my best friend from high school as my MOH and another friend as a bridesmaid. I want my half sister to be my other (and final) bridesmaid, but this will likely cause tension in my family. What do I do? I don't want my sister ruining my wedding, but I don't want to seem like a totally beast for not asking her. My fiance says to go with my half sister because we are so close and my real sister will just cause drama for me. Please help!