Severus recognized the fact that Lucius was speaking for his own benefit, so he remained silent throughout. It was helpful, after all, to have the rest of the story filled in for him. Leonardo had only known so much, which hadn't been much at all. How on Earth did I get here? Severus thought, fleetingly horrified that he was now in the middle of this entire fiasco. But he had a duty to the boy as his Head of House, not to mention his duty to the Malfoy family.
He felt the beginnings of a migraine behind his eyes. "I'm told she passed last year, which is why he's living with Nott now." Severus had no bedside manner. If Lucius was looking for the news to be broken gently, he'd have to go elsewhere.