"If you hadn't already done an excellent job for the group, I would seriously be questioning your loyalty," Albus told him, leaning forward with his hand on the table. "Maybe you can't betray us, but you can sabotage us. Do you realize you're not as clever as you think you are? I will find out what you're up to sooner or later. If you mess up, I won't care if you're my brother-in-law or if your stupid blood is pure. I will personally kill you before the Curse does."