Remus sat quietly, knees up, forearms crossed over them. He let the other man wake up a bit, dose himself, and get his bearings before trying to carry on any sort of coherent conversation. When Regulus did speak, he grinned teasingly, but couldn't bring himself to torment him.
"No, we didn't," he chuckled. "We're both still fully clothed, if you'll notice. And you were hardly in any condition to be taking advantage of my virtue last night." That he never would have allowed it in the condition Regulus had been in, virgin or not, he felt went without saying.
He did shake his head, however, at the mention of Sirius. "You were drinking with Sirius? It's a wonder you're even awake yet. I know how much your brother can drink!" Reaching over, he gently brushed a stray lock of hair back from Regulus' eyes. "No apologies needed for anything, including the room. I told you you're always welcome. How are you feeling now? Little more human?"