Peter frowned as he listened to his brother talk, just hanging onto his hand. It didn't make sense. There was no way that Nathan wasn't his brother. No way. "That's impossible, Nathan." he said with a shake of his head. "No, you look way too much like Dad to have a different father."
He didn't even want to acknowledge the 'you two' comment. He refused to accept that Sylar was his brother. No. That was impossible too.
"He can get back to you, Nathan." he said quietly. "I promise, I'm going to do everything I can to get him back to you."