Grandpaw is absolutely right about the fact that she should have been looking at herself and not looking at the camera.
However, on the point of focus, virtually all the glamour/portraiture/art/modeling books I've seen are in unanimous agreement that the photographer should ALWAYS focus on the subject and NEVER on the reflection.

I also tend to think that the mirror is being held too high; it seems contrived. If she lowered the mirror to a more "normal" position she would simply have to pivot left just a bit to make sure nothing unwanted appeared in the shot. Her right shoulder would block, leaving the viewer to use their imagination (a key ingredient in successful 'implied nudity' shots) as nothing at all would be revealed.