I would at least expect an apology. I also think that if my DD broke something in someone else's house I would at least offer to replace it (even if I knew the person would say no). A number of years ago we had just brought a new (black leather) lounge and friends came over and decided they would take their kids to the beach. They put sunscreen on their kids (as you'd expect), but then the kids climbed all over the couch, leaving white hand prints everywhere. We couldn't get them off with anything we had in the house (we were pretty devastated - we thought the couch was ruined). They came back the next day with something to get the marks off