just let her eat as much as she wants. Some people claim that its ok to feed breeding females pinky mice, but after examining the stools of some after eating rodent prey, I'm pretty convinced that they just do better on insects.
Waxworms are a good source of food that can replace the fat stores they used up in breeding effort.
Make sure she has calcium available as well at all times. They will lick the powder straight out of a dish, so no need to dust the insects.
