Am I overreacting?!

She has no job, and only sees her kids 3 days out of the week!! If you can't come those 3 days then you shouldn't come at all! She's a mom, you don't have sick days!! When she had them full time we drove 15 minutes to her house and back every weekend! Never missed a weekend! I'm tired of her being lazy and not being there for her damn kids. If you're gonna half ass it then you don't needa see them!!😡