So I have this situation with my sister who decided upon her part that she was going to invite some people to the wedding. We have just given our caters our final numbers. But because she assumes the person is doing our hair and is her best friend, that it okay to invite these people, without even talking to me, the groom, or anybody. Also, she has a date to the wedding already so why is she bringing extra guests. I'm just wondering if I have ever right to be pissed off at her.