We were away over Christmas and friends (not close friends if that has any relevance) asked if her parents and her brother could stay in our house as they were coming to stay but our friends have 5 kids so couldn't house them.
I've never met parents or brother but really didn't mind so said yes but was slightly ungenerous in that I asked if they could bring own bedding and towels as I didn't want to get home to having to strip and wash beds.
I have to confess, I was kind of expecting a bottle of wine or something but at the very least a note to say "thanks for letting us use your house". There was nothing, not even a note, just the key left through the door. Is that normal? Maybe I have an over-heightened expectation of manners, but that just seems rude to me.