Song Yao only discovered it when her phone ran out of battery one day, and she used her mother's phone to call her classmate to ask about homework. It was then that the woman happened to text her mother to insult her.
Anger crushed Song Yao's rational senses. She directly used her mother's phone to scold that woman back, using words a hundred, even a thousand times more vicious than that woman!
But the third party complained to Song Yao's father about the text. Without bothering to verify the facts, when Song Yao's father saw that the message came from Song Yao's mother's phone number, he charged home and blew his top at Song Yao's mother, slapping her across the face and accusing her of being vicious.