I am not sure how to handle this situation. My fiance has one sister and one brother. I have one sister. My sister will be my maid of honor and two friends will be bridesmaids. My fiance will have his brother as best man, and two friends as groomsmen. So his sister is the only sibling left out of the wedding party-- besides my fiance's sister-in-law who will be helping her children during the ceremony as ring-bearer and flower girl.
I am not close to his sister although I like her. We didn't exclude her for any particular reason other than the fact that this is just how it played out in terms of gender and keeping the wedding party small. I just didn't notice how awkward it is not to have her until we started really planning and talking about it when she is around. And then the other day my fiance's mother told him that she thinks her feelings are hurt because she is the only sibling left out of the wedding party-- although she has never said anything about it to us and seems ok as far as we can tell.
I really don't want to change things around at this point in the planning process (dresses purchased etc), and if we ask her now, it almost makes things more awkward because it draws a lot of attention to the fact that we didn't do it before. Should we ask her to be a bridesmaid or just let it go? Any ideas about how to soothe any potential hurt feelings that aren't in the open? Right now she is supposed to do a reading. I just feel really guilty about this and wish I had just asked her to be a bridesmaid from the begining.