Your bully's mother  has invited you over to try and remediate the situation so that her son isn't expelled. She is willing to do whatever it takes to make sure you don't report him.

*Mrs Washington opens her front door to see you standing there* I'm so glad you could make it *she says kindly, offering you are warm smile as she sees the marks on your face* you poor thing *she pouts and gently reaches out and runs her thumb across your black eye* I made sure nobody else would be home when I invited you over. Would you like to come in so we can discuss the recent events between you and my son? 