Kill him quickly and quietly...(magic)

You harness your rage and encase Willaim in shadows, coating him like a second skin. He starts to claw at his face and your can vaguely make out his face as he desperately claws for air. Then you tighten the entire skin. His body erupts in pain as every inch of him is crushed by the shadows that cover him.

He stiffens for a few seconds, then goes limp and collapses to the floor. Your rage has now been spent, and you´re calm again. A corpse would complicate things so you decide to remove his body. You lift it into the air and set it on fire with dark blue flames. In mere seconds his entire body turns into a Little pile of ash which you then dump in the fireplace.

There, your anger is gone and so is that annoying son. Feeling a lot better, you return to the bed and snuggle in next to his mother before falling asleep...