Cut it off.

In a dimly lit bedroom, a boy in a green hat holds a black object to the mouth of a sleeping child in a green onesie, while another boy in a blue hat with a red pom-pom appears behind him, looking shocked. The boy in the green hat's expression shifts from concentration to anger as he presses the object to the sleeping child's mouth, and the boy in the blue hat reacts with wide eyes and a grimace, his face briefly overlapping the scene.