Best friend hates my husband

She really hates him so much, won't let him do anything nice like he made some really big mistakes in the past but none of them included him? He was nothing but nice to her all the time, she just told me that he's an asshole and thinks that he's so bad for me.

He has never done anything that hurt me, he changed and is the perfect husband. We got married a few months ago and we have a baby and I'm pregnant again and he worked so hard, we live in a really nice gated community in LA now and our house is goregous and way too big but perfect for our family. He doesnt take any drugs, I get that she's scared that he might because he used to but he doesnt even smoke anymore. He's incredibly supportive and understanding and caring and a wonderful dad but all she does is saying that "he's a prick" and its really getting on my nerves.

I told her everything like all the time about our good moments and sometimes fights so she started getting like really disrespectful towards him so I stopped telling her about our fights but honestly what is a best friend there for if I cant ask for an advice. 

Last night we fought (with my best friend) because she said she won't come to my babyshower is he's there !!!!!

And then she was like "you should just leave him he's just a bastard" and honestly I don't know what to tell her now.

I dont just want to let her go, she's my best friend since 10 years now but she has never been in a relationship and doesnt understand me...