Ok, so my fiance's sister is going to be 9 at the time of our wedding. and to put it nicely she is a brat. We don't even babysit for her because she is so bad. she whines and cries when she doesn't get her way, she is extremely hyper and I i dont want her at my wedding. I am having an adults only wedding, even though i wanted 2 small cousins going because they are very well behaved. i know she has to be in the wedding party but her my future mother in law whom i love is the type of person who brings her every where even when she isnt invited. she actually was told not to bring her to an adults only wedding and brought her anyways! i dont know how to handle this without a war. i dont want her ruining my day. it's very formal and there are no children on my side coming and i dont want an exception for a misbaved little girl