I have kind of a weird situation:. My teen daughter teachers piano Thursday evenings for an hour in one of my daycare rooms bc that's where the piano is...parents sit in the room with their other 2 younger kids listening in on the lesson which is fine. Only problem is now for the second Friday morning I've discovered a pee spot on the rug - i thought first time it may have been a tea stain but now I know it's pee - how do I or my daughter approach the parent? The parents don't realize it - they're great and I know they wouldn't want this. They know they can use the washroom - one of the kids has just decided to pee (same spot as last time) on my beautiful butterfly reading rug... Any suggestions? Thanx bunches