A phone call awakened her memory of being bullied as a student. The bully's words of "don't care" made her realize how ridiculous she was, and his appearance made her feel how embarrassed she was...
They were supposed to be in peace, but his frequent appearances in her life made her feel extremely annoying. Since they wouldn't let her go, she had no choice but to take revenge and complain...
Intention: I am not a Holy Mother, don't expect me to have a Holy Mother's heart