Same thing happened with my mom. We decided to find something we both enjoyed to watch together. Just like the old days when black and white movies were our thing, Mom made a snack tray and we sat down to watch a show together (like going to the movies, except at home).

Animal, nature, gardening, travel and cooking shows did the trick. Once again, we had something in common that both of us loved to talk about. My mom was back.

Interestingly enough, Mama started watching those shows even when I wasn't there. She'd call me up to tell me something really interesting she'd seen on some animal show. Next thing I know, she's calling to tell me there is an old black and white movie playing, do I want to come over and watch with her.

I don't know if that helps you, but that's how I got my Mama back.