To say she'd had enough was an understatement. Alecto struck Ernie in the face, hard, square where her curse had caught him. She raised her wand again, then, and the Cruciatus was a balm for her wounded ego.
What did this child know of the Dark Lord's plans? Nothing, and if he didn't learn to keep his mouth shut, he would not live to see them to fruition.
"Now, we'll go and see Filch, I think. A night in the dungeons ought to teach you a little respect."
She lifted the boy by the arm and made for the caretaker's offices, caring no more for the limp, human weight than she would a sack of flour.