Don’t reorient it just upsets demented people. Just go with the flow , don’t correct unless absolutely necessary. Agree, make up stuff, don’t correct. If she sees people say something general, sometimes I see things too. Change the channel. If she is having a conversation with a person not there, comb her hair, get her a cup of tea, turn on her favorite music, turn on a favorite movie. My mom loves little kids, babies. On especially bad days I turn on the video of babies and success she is good for a while. Good luck, make sure you get yourself some help and a break. Otherwise you will loose your noodle.