"Very good for what?" Draco said, but when the motion came as a movement and not as an order, he did finally move to sit. It was as if Snape had been looking for something specific? His loyalty to Him, he figured.
When he started talking, Draco smirked, but it looked unsteady. "Why would Dumbledore have had a reason to keep anything from me? Or tell me anything, for that matter?"