It's a ways off but I already know my MOH, a childhood friend, and 1 bridesmaid. Both already know, and there is no problem there.
My 1 Bridesmaid is in a serious relationship with my FI's brother, who will be the best man.
My question comes, that since the brother and the gf are going to be in our wedding, is it rude not to include the boys (groom and best man) sister as a bridesmaid?
I have no siblings and i'm not particularly biased either way, but my BM warned that we should probably include the sister to prevent potential mama-drama that could follow.
Reason I ask is that we were going to have a somewhat small reception/ceremony, and we hadn't discussed WP size, I wouldn't want to eliminate either of the two I have.