The spell stopped, and she looked down at Tracey with a look of fond condescension.
"There there, dear. The bad pain is over. For you at least. Now, what you felt, I will do to your brother over and over and over again, until you give me permission to kill him. If you don't, I'll just keep doing it. Making him scream, and twist, and begging to die. But I won't kill him if he begs me to kill him. Only if you do."
She stepped back and trained her wand once again on John.