If you don't want to make any further decisions right now, then don't.
I would tell her something like..
"I am not making any decisions or signing anything until after the holidays. I am too busy right now with work and the kids and the holidays coming up."
I wouldn't let her think I was stalling. I would let her think that I have too much on my plate and what SHE wants is not my top priority.
Don't you know how to duck and dodge someone?
"I will let you know" (and then when they ask again in a day or so tell them.. "woops, I forgot. sorry. I'll get back with you")
and you just keep on ducking and dodging..
Don't reveal your cards. Hold them tight to the vest. More important now than ever.
This is PERFECT, and much better than my suggestion. Much stronger, more leading.