"best friend"

Jill

So I've been friends with (let's call her Sally) Sally for 14 years. She's always been an odd friend. Everything has to be competition and on her terms. So recently she found out she's expecting and their gender reveal is next Thursday. She asked my husband, my sister, and myself to go. My husband works 10+hr days and gets up around 5:30 every morning to go to work. His job is pretty physically hard. My sister works 6am shifts and has to walk to and from work. My sister lives with my husband and I and her job is about a 30 to 40 minute walk. I told Sally that my sister probably wouldn't go since she had an early morning and that with my husbands work schedule he might not want to go. She got mad and said "it's not like we're going out until midnight" I told her it's at least an hour drive from our house to the place their doing the reveal. She said "whatever don't worry about it." I asked her why she was mad and she said she isn't mad she's used to this by now. I honestly want to know if I'm in the wrong or if it seems like Sally's issue. I can elaborate of anyone needs more info.