Does she prefer a pump or semi-auto?
There are many many good choices out there.
My preference is Mossberg.
I suggest the M500, 12 guage shoots 2 3/4 or 3" shells.
22 to 24" barrel with fiber optic sights & interchangeable chokes.
Receiver is tapped for scope mounts as well.

Or the M935 magnum, same combination of barrels and chokes but can shoot 2 3/4 (not too reliable though) 3 or 3 1/2" shells.