When DS was a child, one set of his grandparents lived a 5 hour drive away. They were desperate to see their grandson, so LDH drove 3 hours to a meeting point, and handed off DS. Then, a few days later, LDH and I drove the 5 hours to pick him up, setting off just after lunch. We arrived shortly before dinner time. They offered us a beverage, and then shooed us off, knowing we had a 5 hour drive home. That was the last time we did this for them.
Am I wrong in thinking that, since we were doing them a favour, and we would definitely otherwise have to stop at a restaurant, they should have at least offered us dinner?