Sirius laughed, "Oh please we kept our clothes on when we were in plain sight." Not of course that the hallway was much better than there in the middle of the room with anyone else, but he just hadn't had the patience to wait that night. He gave Regulus a small smile. "I am sorry that I was so thoughtless, but it seems to be the way I am, even when I try to be otherwise. Thank you for that though."
"No you're right, he had plenty of opportunity for sex, hell I offered to shag him several times." He smirked. "So there must be something very special about that talking you two are doing for him to have allowed that kiss, and now even a possibility of sex." He grinned, it was strange seeing his brother like this, like he was smitten - which Merlin help him was never a word he thought he would be applying to his brother. "That is a difference of opinion, I happen to think all my friends are nice." He grinned, well nice to him at least. "Oh gods, please tell me you hexed him." Sirius suddenly found himself jealous at the thought that Regulus had gotten the opportunity to hex Peter where he had not.
Sirius snorted, "Yes and modest too." He smirked having echoed his brother's earlier words. "Oh I think the firewhiskey is helping, and I plan to go obliviate myself when I get home." He teased, nudging Regulus' shoulder with his own. Sirius didn't know much about what was going on between Albus Potter and Snape, but from the sounds of it there was more than he wanted to know. "Alright then, if it's about being happy, then I think that Remus is going to be the better person for that. I don't think that Snape knows how to be happy, not truly. He may laugh and tell jokes, but I don't think he's a happy man. And Remus he can be happy, and he can make you happy, if that's what you want."
"Practically the same things in my mind." He smirked. "No I think it might be good to have another head on this." He didn't say anything about the missing space they had in their group, because Regulus was no replacement for Peter. Sirius didn't want Peter replaced, he wanted Peter dead, but that was not important right this moment.