"Friends of a relative stayed the night at our place with their kids while we were out of town. We asked if the children wet the bed so we could put plastic sheets down. They were confident the kids wouldn't wet the bed so we let it be. We come home to find 2 of the beds (new matresses) soaked in pee - not even stripped or changed. The kids had wet the bed in the night, moved to another bed and wet again. 3 weeks later we found used diapers under one of the beds. Never said thank you, never said sorry."