my mother found out that my bridesmaids and MOH want to take me to Vegas for my bachelorette party. I was super excited that they wanted to do that but here is the problem...my mom seems to think she is invited and invited on of our friends as well (who is not in the wedding party) I am not too upset that she invited our mutual friend because I like her but the problem I do have is that I wanted it to just be me and my bridesmaids. and for some background information I love my mom but since I got engaged she has become a major pain in the rear!! she constantly argues with me if I don't want things her way and refuses to let my fiance's mother have anything that she doesn't have (if his mom has 84 guest then she wants 84 guest even when she made her list first and it wasn't that large) she thinks everything is a competition between his mother and her and thinks that I am always planning things behind her back and leaving her out! she judges everything I pick out and is SO DRAMATIC that she has said multiple times with flailing arms "well than I just wont show up at the wedding!" and storms out. she has complained saying that I push her away when I ask for an inch of room to just pick something out without being torn apart! she either wants to be 100% in every wedding decision or not at all! and to give some perspective I have given her tasks to do and have on multiple occasions sat down and try to talk it out and she says she knows and will be better but never changes.
so I have two questions:
1. how do I tell her she is not invited? ( OR do I just let her come and ignore her?)
2. how do I calm the crazy psycho that is now my overbearing mother.