The first time my ILs came to visit, I thought they would expect me to cook, so I did. MIL refused to eat anything I made and completely took over the cooking, despite the fact it's quite obvious she doesn't like to cook.
On subsequent visits it was similar. I would cook on occasion, she would declare it inedible and kick me out of my kitchen.
On their last visit, she actually ate my cooking without complaint (although she still mostly cooked).
I would prefer to cook, because she puts a gallon of oil in everything so I have indigestion throughout their stay and she leaves an unbelievable mess.
Based on your experience with your own ILs or what you've seen in your family, what is the real expectation here? Does she want me to do the cooking but I'm supposed to insist harder? Does she want to make sure she has certain food and thinks I may not be able to cook it? Does she just want to be in control, even though she doesn't like cooking? As usual, DH has no clue!