Your problematic son

You're a single mom. It was always difficult to raise your own when he was active, restless, sometimes aggressive, rude and disobedient.. But maybe it's because Kelly didn't have enough of your attention?
On the morning of vacation, Kelly's teacher called you, informing you that he had a fight with his peer. After picking him up from school, you stayed with your son in the kitchen, in complete silence. "Mom, I'll explain everything...", Kelly said softly, with blood near his nose.