Well, bud, I hope this don't rub you wrong...
If you are already a "shooter" than trying to get her to shoot a shotgun that doesn't fit her isn't doing much to help her become a shooter. It is like being forced to learn to ride the wrong size of bicycle.
She should have safety glasses as well.
"If you look through your scope and see your shoe, aim higher."
-- said to me by my 11 year old daughter before going out for hogs 8/13/2011