Try some 1816s cut to 28".
Let her alone when you shoot with her, and keep your back to her so she can study you a bit without your knowing it. If you muff a shot, just say, "Dang, I plucked that one" or whatever you did, so she can get a feel for what to look out for.
I think the biggest fights in some families occur when one member tries to teach another one how to do something. It messes with the dynamics of the relationship. I generally learn better from books or observation, myself. Maybe watch a shooting video with her, but don't get all teacherly and explain down to her what is going on. Just learn with her and puzzle it out together.
Killdeer