Or I could flip it around for her and ask her to spend NYE with kids and I'll pick them up the next day.

So;

Thanksgiving: her w kids
Day after Thanksgiving: me w kids

Christmas eve: me w kids
Christmas day: her w kids

New Year's eve: her w kids
New Year's day: me w kids

I don't want to make this into a fight, but since she's in vacation mode I do find it very suspicious that she wants me to stay with kids on NYE.