I did this movie "Mommy, Granny & Me" last year with her. She was granny. We were in the same scene but didn't have a whole lot of contact. She was very nice and funny on set though.
The fear of heat thing sounds pretty irrational, possibly fueled by some kind of substance and I don't bring anything except weed (or alcohol) into my home. I just feel bad for her. It makes me sad she's at that age with nowhere to turn. I wish the best for her.