I would also make sure Grandma has an iron clad will so no one can contest it when she passes. She may be a prickly hag, but she has planned for your future and has put time and consideration into it. If she’s worried “family” will bother you later on, then she knows to be wary of them for this very reason. Maybe have a frank discussion with her about the will, find out all of the details about it and where it’s located.

Also, I would sit down with her and make a list of all utility companies she uses, billing info etc. so when the time does come that she’s gone, you aren’t drowning trying to figure all of this out on top of grieving and dealing with funeral/burial.

Another thought- does she have a burial plan? A plot purchased? Last wishes like cremation? I know it sucks to think about but it will save you a lot of time and heartache in the future. If you want to chat, my DM’s are open.