Sirius laughed and decided to leave the issue of his modesty for now - it wasn't one he was overly concerned with right now. Of course had they been at some club instead of at home - well that could be an entirely different story.
Snorting Sirius grinned, "If that's what you need to think." He teased him, gods it was strange thinking about his brother with Remus. His laughing stopped though when Regulus brought up Peter again. "Pettigrew is not my friend." Whether the rat was nice or not was irrelevant. He couldn't help grinning though when Regulus mentioned what he might have done. "Now why is it that you could possibly break the rules and hex him and I just have to avoid him? Seems very unfair to me."
"Hmm yes, that is probably a better option, I'm not sure I want to forget about that little bit of news about Pettigrew." It really was too satisfying knowing that, and he wished he'd been the one to do it instead of his brother. Snorting Sirius shook his head. "Of course it's not, but I think that is as close to unbiased as you're going to get from me." All in all he thought he'd been pretty fair to Snape about all of this.
He snorted again. "I wouldn't go that far, but seeing as Remus has already gone and spilled about the map you might as well help with it." He smirked in reply.