My mother in law had me thinking we were going to the cemetery all day yesterday which was great…

My mother in law had me thinking we were going to the cemetery all day yesterday which was great cause the hubby was off. But at the end she said she didn't want to go anymore. Today she goes with his sister and her three kids knowing I won't be able to go since my hubby has the car and he's at work. I'm pretty upset about it. I REALLY wanted to go. Am I over thinking it or is that shady as fuck?