Sounds like you need to ~ your own sanity and everyone else in your daycare that has to listen to it and feel the stress that she causes.
Good luck tonight! It won't be easy as they might beg you since they did it once before but remember how your feeling right now and that will hopefully help you stick to your guns.
I have to stick to my guns tonight, oh yes they will most likely try and get me to change my mind just like they did last time.