My first Mother's Day MIL drama

I know this is a little late but I'm still upset about it. My husband has a daughter with his ex girlfriend. She's three now. I just had our daughter three weeks ago. My husband's mom bought his baby mama (when they were together) a necklace and flowers for her first Mother's Day and didn't get me anything or even tell me happy Mother's Day. I told her happy Mother's Day and that I was glad to have her as my MIL and nana of my baby. And supposedly they don't even/never liked his ex because she's weird and doesn't talk. And isn't a very good mom.