I need some positivity

My fiancé and I are having a little boy in about 14 weeks. He has a little girl by his ex wife, and they don’t get along but I’ve always made amends with the the ex wife for the little girl. I told her I can’t wait for Ava (the little girl) to get to meet her little brother. and she comes back with “no mam. She will not be at the hospital thanks for the invite tho”. I told her from the start I wanted her to be close to her little brother and that i didn’t think it was right for her to not be able to meet him when his born. And she comes at me with “you don’t tell me how to raise my child. You have some growing up to do”. Like did I say something wrong?? I’ve been crying for an hour...