Wedding+parents=DISASTER!! HELP!

My fiance and I have been together since I was a freshman in high school and we plan on getting married next spring. However, my mother has always been on the more controlling side, and her relationship has been on and off with my fiance. She's extremely dramatic and manipulative and getting support from her is hit or miss. With the amount of stress she's caused, I don't know if I want her there. She's my mother, but should she be invited to a wedding she's against every other day?