"I wouldn’t advise insulting my mother when I’m the one with the wand, Weasley," Draco purred.  He pointed his wand at the stairwell and cast an amplify spell.  Father would have the bitch on her back again by now, and sure enough, they could hear Hermione moaning and begging.  Ron growled almost animalistically and tried to fight Harry again to get to Draco, who stepped back through the gate, locked it, and sneered at them through the door.