Client asked me Saturday morning to work mother’s day weekend? Crazy?

So I worked up until 10pm Friday night for a client. She texts me Saturday asking for me to work the weekend.. already had mother’s day plans Saturday with my mother and hubby planned a staycation for us in a nice hotel... I told her I was frustrated that I would have to cancel my plans and she didn’t seem to understand. Now I’m worried it’s strained our relationship.. but seriously who does that? She doesn’t have kids, and her mother has passed away which I get.. but to do that to someone else I feel like is really inconsiderate. Am I crazy to think that?
I would normally work any other weekend, but to me this one is a special holiday and we had a lot of plans. FYI I did work all day Saturday, we checked into our hotel very late.. and I cut my brunch short with my mom.. all thing I resented having to do