loooong rant/need advice

Extremely upset right now. As I mentioned earlier my baby shower is tomorrow. I just started getting excited about it tonight. Of course something has to go wrong...I mentioned it to someone on the phone and then heard my mom mumble "f***" under her breathe which means she's going to come up with some excuse not to come...WHATEVER I expected it, After 24 years of her being my mother I'm so used to the let downs....BUT my fiancés dad and aunt are coming and they are so excited and ready to meet her. My fiancés dad and aunt are so protective over me. I'm the only woman in my fiancés family other than his aunt and Swayze is the first baby they've had in this family since my fiancés brother was born 28 years ago...So they treat me like gold!!! I am so lucky to have them BUT I know if my mom doesn't show that hid aunt and dad will say something. Now even though my mom is definitely in the wrong, my family is still a family so if his aunt does at anything it'll be like World War 1 at my shower. So now instead of being happy, I'm just nervous....sorry this post is so long