Based on your title, I would guess that you read my thread. If it were me I'd be furious. I would probably wait until his kid was not around (depending on how old he was) and then rip the dad a new one. He obviously knew he had done something wrong otherwise he would not given his kid the "keep your trap shut look". I would guess that the kid didn't know that he had done something wrong based on his eagerness to tell you about their mourning. It sucks to do someone a favor like that and have it blow up in your face.