I'm having a VERY small 20-person wedding, and only 3 people in my family are invited - my mom, dad and sister. No wedding party (if so, parents will INSIST sis is in it)... My sister is a complete nightmare. She's a narcissist to a billionth degree... so much so that when I asked my mom to go with me to look at dresses my mom INSISTED that my sister come too because it's been my sister's life long dream to try on wedding dresses - yes, that means that my sister would be trying on dresses WITH me even though she's NOT getting married and doesn't even have a boyfriend!!!!!
My sister is an extremely belligerent alcoholic who will DEFINITELY make a scene during the wedding, and she will DEFINITELY make the day all about her, which is her general and constant MO.
My parents are very upset about my decision not to have my sister at my wedding, but they're not paying for ANYTHING. I feel terrible that I have to make this decision at all, and I just hope I'm not going to regret it.