Glad MIL is visiting SiL and friends. Nice she had a chat with you and is less guarded. It’s great they are traveling with CCRC instead of just the 2 of them. It would be good if MIL goes back to walking or some activity. You’re a wonderful DIL and your MIL is very lucky to have you.
In our household, my H (who is about MIL’s age) is my tech support, having been in tech for 45 years. Fortunately he’s pretty good at it.
Sad they bought gas grill & are now afraid to use it.