My fiance has 2 older brothers and 2 younger sisters. Both of his brothers are standing up, along with both of their wives (his/mine-to-be sisters-in-law). Throughout our relationship I have gotten closer to his brothers wives, however I am not very close to his younger sisters. I keep telling myself, this is my wedding & I'm not going to have them in it if I don't want them to. Since his younger sisters are only 14 and 17, I asked my fiances grandmother if she thinks I should allow them to bring a guest each. Her respone was "Well aren't they going to be standing up!?!?!" along with a nasty look. Then I thought, maybe I'm being rude by not wanting his sisters to stand up even as junior bridesmaids. What are others opinions?