Well my guy is a bit of the same story. He's a voracious eater and I'm not sure he would ever stop eating if I gave him unlimited access to mice.
What I would say is that if she seems hungry even though she's just eaten, try to find a smaller sized mouse and give her that so that if she wants it she can have it. It might be cheaper to go with one rat as opposed to two mice at a time, but as far as I know it's pretty much the same banana as far as nutrition for the snake goes.