first Mother's Day

Roxanne
My husbands bday is on the 13th and Mother's Day is on the 14th. When we went to my MIL house earlier she said she wants to celebrate husbands bday on Sunday. And I said, Sunday? That's Mother's Day why not celebrate Saturday instead... and she said yes so it's combined. Well, to be honest, that really pissed me off because it's my first Mother's Day and I don't want to spend it with my MIL ... I wanna spend it with my daughter and husband. He's not going to say anything to his mom because frankly, he doesn't care what we do but ugh!!! What do you guys think?? And how would you feel in this situation?