Basically, you're not renting if you're there for free and there's no written agreement. You're just squatting but with permission.
Man, that old lady reminds me of some of the old scrouges that I used to know. Rich, but damn stingy and never wants to spend any cent if they can. Good thing they passed on and now their grandchildren are using their money like no tomorrow.... and now need to get more money back.😓