Staying with in-laws (aged in late 60s). We are a normal healthy family with normal appetites (I think?). I am sick of having to "request" 3 meals a day. As far as I can work out they generally must eat a cup of tea for breakfast, a dry wafer with a thimble of cheese for lunch and a grilled sardine for dinner usually, with loud exclamations that the enormous amount consumed for each meal will see them out for the next few days.
Today I have had to drive to a cafe for a normal lunch and bought horderves "for Christmas" just to bulk up the dinner of boiled potatoes and two slices of ham. Children are ravenous. It was their choice of hosting, and I am paying for all the food (but they get to dictate the (lack of) menu!