I have the same dominence issue right handed and left eye. I was taught at a young age to shoot all types of weapons with my left eye closed. This was long before I even knew about eye dominence. I've never had a problem shooting like this, but when I tried to correct it by other meathods my shooting went in the can.
I would try getting her to shoot left handed but if she is a right handed person this may seem ackward,if so have her close her left eye.
Take her to dinner there's ample time to eat in!
