My sister and I have never been close. She's 5 years older, acts 15 years younger than I. She left home early so I grew up without any siblings in the house. She's had a rough life and has made some bad choices. She's turned her life around and for the better. Unfortunately, she still acts as if she's 15. She's got 3 kids and is recently remarried. There is ALOT of baggage between us. Tonight, she calls me mom yelling about me not adding her to facebook, not asking her to be in my wedding when I wanted her kids to be apart of it... So, I add her to fb thinking that would appease her for a while. In response I get hate mail telling me she didn't want to be added to my "fake profile" (whats funny is I do have a fake one, but I added her to my real one).. she doesn't know why I wont ask her to be apart of the wedding, she wishes I was an only child, made reference to suicide.. etc etc...
I lost it quite frankly. I never say anything bad to or about her. I try to keep things civil between us but I lost it.. I bascially laid everything on the line for her. Why I didn't want to be fb friends, why she's not in my wedding, how i think it's ridiculous that everyone has to walk on eggshells to appease her to keep her from going off the deep end.. I never once called her names or cursed or anything..
Now, I know I'm bitchy and I'm ok with it. But I can only take so much.. I just dont know how to keep my mom out of a horrible situation. Anyone dealing with anything remotely close to this? suggestions on how to go from here? I'm lost.. So emotionally upset I'm physically sick to my stomach and not sleeping now.

I basically just needed to vent to someone not involved. Sorry to lay this on you ladies this late at night.