Fred,
How about a holographic optic like a Trijicon or maybe and EO Tech. I'm sure there are others, but this way she is not limited by field of view with a traditional tube red dot. They will be lighter, but the biggest advantage will be the FOV especially if you can get her to shoot with both eyes open. I'm sure some of the optics sponsors here at GBO will have something that will fit your needs.
Heavy C