My fiancé and I have been together 3.5 years and he popped the question over the weekend. Now it has turned into "should his sister be in the wedding?", she has already started bugging us asking if she's in it. She has been in two of her three best friends weddings, and both times I have seen a lot of issues, all related to her mental illness (she's bipolar). We were close the first year that I dated my fiancé, but now these past two years have been pretty rough. Between extremely mean things that she has said about me, to her selfish behavior, to the stress of having to worry about her illness, it has come down to me not wanting her in my wedding.
What are everyone's thoughts on sisters of the groom etiquette? I'm very worried about her stealing the spotlight, causing drama and just in general not getting along with my other bridesmaids. I planned on having a very small group of two bridesmaids and one MOH, so that she wouldn't be excluded from a huge group.