Huddy I agree with you, I don't think there is any reasoning with any MLCer. You do however need to put a plan in place for holidays and celebrations. What does she want? To take turns so that the kids will spend one year with you and one with her? To split they time somehow? Could you get a mediator or is it a short notice? At the very least maybe email her so that you can have some evidence about agreements or negotiations?
Best of luck!
"There's nothing sadder than a conman conning himself"
“There is freedom waiting for you, On the breezes of the sky, And you ask "What if I fall?" Oh but my darling, What if you fly?”