"You're bloody fucking right about that," Sirius replied firmly, even as Peter caught his flailing arm. If they had to leave the Order, then he'd do so in a heartbeat. They could continue fighting on their own, no matter how difficult it may be. He was already close to reaching his breaking point as it was, and he knew the others felt the same way.
He finally dropped both arms down to his sides, though his hands were still clenched into fists. "Whenever you're ready, Remus," he said, nodding as he fought to get himself under control. This was Remus' call - whenever he was ready to face Bones and Fenwick, they'd be there with him for the whole thing. There was no other option, in his mind.