is it wrong of my to be mad at my sister to tell my real dad I'm pregnant? he left me when I was 7 I…

is it wrong of my to be mad at my sister to tell my real dad I'm pregnant? he left me when I was 7 I was always a daddy's girls I "worked" on cars with him and was pretty much with him 24/7 when he was around than he left came back left and came back more times than I can count on both hands. so after the last time I was 13 I said no more I obviously don't mean shit to him. he tried coming back when we taught I had cancer in 2014 but I said I wanted nothing to do with him. haven't spoken to him once since than. he does the same to my sister on graduation and her wedding he said he'd be there and wasnt. he's not a dad in my eyes. and I don't want him around me or my baby! my mom said he has the right to meet my baby but I don't think so.. he hasn't been there for me and iv been just fine. my baby has more of a grandpa from his/hers dad's side. I'm a wrong? he's not seeing my baby no matter what.