After dinner the night after Harry's birthday, Arthur called the entire family together, and he told them the truth about the family, and what they were really going for. Harry was shocked to find that his new family had been working for the man who killed his parents, and nearly killed him. It took a stunner from Molly; as well as hours of conversation before he understood that they hadn't been working for Voldemort for several years, since right after Harry had joined the family. That was the turning point for Harry, he wasn't happy about what they had done, but, that was then, and now, they were his family, the only family he had left. He wasn't sure he liked the idea of being pushed forward, and using his abilities to gain power, but he agreed to go along with the family, simply because it gave him a chance to make sure that Voldemort never came back.