Sirius watched in surprise. Of the reason's he'd expected Peter to list, that hadn't even crossed his mind. He stared, open-mouthed as his friend ranted.
"Wait," he said, pulling himself up to sit. His voice changed. The pleading was gone, leaving a quiet, uncharacteristically careful tone. "Peter. Wait." He held up his hands in surrender. "I'm sorry." He was worried about his friend. That book thing again. He could hardly remember what happened to him in the book. He just remembered that it had made Moony sad and then they'd had sex.