Most importantly would be range time and training along with working on her mindset to ensure that she would be capable of using the gun if needed. If that mindset isn't there she doesn't need the gun to be taken away from her when she is second guessing her actions, and the gun end up being used against her and your child.
Oh and as 64zebra has suggested, getting her to go through a CHL class wouldn't be a bad idea. She would then know the laws of your state and wouldn't have to second guess her actions. It would come from a third party, so your off the hook. Several of the women who have attended our classes have said even if they don't send the paperwork in they are glad they took the class because it is now clear to them what they can and can't do to protect themselves or their family.