I am new to the area, and most of my friends live very far away and some I have lost touch with, I have a maid of honor and a bridesmaid, but I was considering the option of asking my fiances two sisters to be bridesmaids. We don't know eachother super well, because we don't see his family too much but we all get along great when we are all around. I've been told it should be the people "closest to you" but they are his sisters, and I would like to show a token of "I would like to get to know you more" sorta thing, since I don't have any sisters I am close to. Thoughts?