In general, I would solicit questions from her - "do you have any questions about how that works/do you have any questions for us?
Specifically, I would ask about her eating habits/what she usually eats at home. Maybe take her grocery shopping the first time or two.
I stayed with a host family in a foreign country and it was actually a pretty terrible experience in terms of food - she didnt eat breakfast, so we didnt, despite the fact that we were out on tours or in classes and didnt eat lunch until 2pm. Lunch was mostly large pieces of bread with 1 small slice of meat, no condiments or extras, a small piece of fruit, *maybe* a small chocolate. Dinners were usually plentiful, but mostly plain white rice, some ground meat/spices and a pastry bread. She did complain about how much of the meat we ate too...All that to say, the food is a *big* part of the cultural experience, and it's also a comfort issue, when you're away from home. But I wouldnt coddle her too much either! That's also part of not being at home-learning to deal with situations outside your comfort zone.
Also, the shower was cold and kind of drizzled - not full force at all, and then she would be mad at me for taking long showers - I needed a longer time to get all the shampoo out of my hair!!
(I think she was in financial difficulty and she must have goteen some sort of financial compensation for housing us, and was just trying to capitalize on that. She gave us a key to use while we were there and didnt ask about our comings and goings, either.)
good luck, have fun!