Harry sighed again and explained. "Apparently Malfoy refused to fall in line with you-know-who’s orders." In response to Hermione’s questioning look, he added: "He wouldn’t kill anyone, apparently. Anyway, you-know-who started –" Harry winced noticeably, unconsciously clenching and unclenching a fist "– punishing Malfoy for his disobedience, but Malfoy still wouldn’t kill anyone. In the end, Lucius disowned him, and then you-know-who threatened to kill Narcissa if Malfoy didn’t do what he was told.