He should have expected that Regulus would ask. Only the loneliest, coldest of men would not seek out their families. But he hadn't expected it, and for a moment the calm mask slipped. Lucius' gaze moved to the doorway, detached for a moment's composure. From this question he knew that Regulus had not seen his cousin.
"She did not react well to my arrival here. One can hardly blame her distress, I have been dead some time and would have been around twenty years older when last we spoke," despite this, Lucius couldn't claim that she seemed to be well. Narcissa did not seem to leave the Manor, and there were no visitors to be avoided. It seemed that she had closed herself to the world. Even she and Draco seemed to have little interaction, though he could not help but blame Draco for this.
Though he felt that there was something distinctly wrong where Narcissa was concerned, he couldn't bring himself to point a finger of blame towards Draco, not to Regulus. Not when it might so easily be pointed back towards him.
"I do not think she is well," Lucius said, his voice a little less smooth than he would like.