...If it only happens once?
DS1 said some mean things to his friend at school before we broke up for easter and they were actually not very nice, she also didnt say anything mean back though her friends did for her. He got upset when I picked him up that day because he felt bad about saying them, I told him why it wasnt okay to say them and he went in the next day with a note saying sorry and that he didnt mean any of these things.