It's bad to be a tattletale.
Sara sees her little brother playing in the dirt outside after he takes a bath.
Sara wants her brother to go inside the house.
Sara tells her brother to go back into the house and cleans him off.
Sara runs into the house screaming that her brother is doing something bad.
Sara's mother never knows that her brother had gotten dirty in the first place.
Sara's mother gets upset at Sara because she thought something was wrong with the boy.