Regulus weighed his options for several seconds. Lucius had always been ambitious, superior, and grasping, but he'd never been completely insane. There was a small chance, just a small one, that even Lucius could see how completely out of control the Dark Lord had become.
Even if he hadn't, Regulus had nothing to lose at this point. Discovered was discovered. His lips twisted into a wry smile. "Somehow, Lucius, I doubt that highly. How is my cousin enjoying her extended guest and his parade of minions in your home, by the way?"