"That would mean that you have to explain about your mother," Percy said, because he hadn't considered that possibility, knowing how much Cass hated the idea of people finding out about her. "We'll see, Cass. I don't want you to lie or complicate things more than we have to. I... I don't know; we'll see, all right? We'll wait until you can think straight."
Perch took Cass's hand in his, and snorted. "No, you wouldn't have. You're a Slytherin through and through. You'll always go for the most complicated solution instead of the simple one. I honestly believe that it's why the LeStranges or even the Dark Lord never won the war. Thank God," he added under his breath. "You know we aren't done with this discussion, Rodolphus, the girl, your mother, any of it, but it can wait."