Sirius nodded, if Peter ever showed up here, he was as good as dead, Sirius didn't care if he was a rat or anything else, he was going to kill him for what he'd done. "You didn't know," Sirius said shaking his head, "None of us did." And they'd all thought that maybe it had been Remus, god Sirius could hardly stand thinking that now. "It should have been me, I never should have suggested him." He'd have died before he gave up his friends, he never would have told anyone where they were, but he'd never get that chance now.
"I don't know, it was -" Sirius shook his head, "It was a miracle." Even he could admit that much, he didn't understand how it had happened only that it had. "But he was, he was perfect." Same as he had been from the very beginning, Sirius had always said as much and even on that night it had been true.
James would have more questions, questions that Sirius didn't have the answer to, he couldn't possibly know how to answer all of them, but he'd try his best to make it happen for his friend, whether he could do it all himself or if he asked Jamie to help him fill in the gaps. "I - that night, Hagrid was there too," He tried to explain, "Dumbledore sent him to get Harry, he took him. And I - I had to find Peter." He told him. "I started tracking him, found him and he - he killed so many muggles." Sirius still remembered the devastation of that day, how thoroughly Peter had managed to wiggle out of his grasp leaving him with nothing. "No one knew we'd swapped places," He reminded James, "No one knew we were animagus." It had been the easiest thing in the world for them to send him to Azkaban. He was a traitor, he killed his friends, he killed Peter and all those muggles, he was a Death Eater. And there had been only one place for Death Eaters.