Narcissistic mother. Urgent help!

Gabrielle

My mother is an abusive narcissist. She publicly yelled at me, inches from my face, last weekend when I dropped by to a family dinner for my baby sister that I wasn't invited to but felt it was right to bring her a present and then excuse myself. I have no relationship with my parents, and I've honestly had nothing inside me that cared to try again, especially after that. I'm sick of crying and feeling like I'm losing my mind. My sister has recently started reconnecting with my mom and says it was my fault. That I wasn't fair to my mom because I wasn't reaching out to her to connect. I dont want a relationship with my mother the way she is right now.

This weekend is my nephew's birthday and my mother is going to be there. I don't feel safe going. My mom has no problem causing a scene and singling me out, and my sister seems to be sliding with her.

I dont feel I'm obligated to try to build a relationship with an abusive person. Why would I? My nephew is 2, so I want to come up next weekend to give him his gift and hang out with him.

I feel confused, alone, isolated. I feel weak, feel burdened under guilt. I dont think I'm being a bad person, but I'm just so scared of being dragged through another attack when I'm obviously not strong enough to walk away.

Any advice from other narcissist victims? Am I a bad person?