I apologize, I made a confusing post because I was super emotional.
I am friends with two sisters A and B. A is my best friend, but I am also close with B.
B is getting married and I am only a wedding guest (this is already confirmed). I vented to my grandma and she was shocked I was not in the bridal party. She watched all of us grow up together and saw how close we were.
A is having a baby shower hosted at my parents place. The idea was for us to work together and get everything ready.
B is having her bach party the day before and she was asking what she could contribute and pay for. Asking if I would be in charge of the menu and stuff. She would come help 2 hours before the party. I was not invited to the party the day before the shower. I would have been working alone doing everything with B strolling in right before the party.
I love A and I am contributing quite a bit with decor and a dessert she likes. A even told me that her sister and SIL were in charge of planning everything.