My Mom and I are fighting ......?

because she undermined my parenting & made a joke out of my troubles last week. I've tried talking to her but her ego is currently in charge and accountability, apology or just human decency is out of the question for her. In the past when this has happened it wasn't close to Mother's Day but I would be forced to just let it go. I have honored her in every way until now. Now I have no plans to even be with her on Mother's day, no card, no flowers. I'm spending the day the way I want to as a mother instead of mymother ruling the day. My daugther spent today with her grandma. How do you honor someone when they are not being honorable?