Remus stared at Regulus for a long moment, more taken aback by the order than the tone of voice it was delivered in. "Fine," he growled finally. "Next time you come between me and a target, I won't check the swing and we can patch up your nose after I shatter it."
Taking the owl back from Regulus, Remus cursed under his breath at realising he'd picked up the one from Harry's sister-in-law and not the one from Sirius. Throwing it into the closest chair was as good an excuse as any to put some distance between him and Regulus anyway. Grabbing his wrist had been as close as Remus wanted to come to touching anyone while he was in this mood. He was well aware of exactly how strong he was and how badly he could hurt someone without ever touching a wand or casting a spell.
"No, he didn't -- either him." The irony of finding out Sirius was married on the same day he confirmed HE wasn't was not lost on Remus. And, eventually, when he calmed down, he was sure he'd be very happy for his friend. But, it bloody well hurt like hell in that moment. It brought back all the pain of being excluded that last year before everyone died.
And of course, the fact that the real traitor amoung them was now living in the castle was just hemlock icing on an aconite cake.
"Not that I should be surprised Severus couldn't even do me the courtesy of a warning."
He huffed irritably when Regulus finally spoke again. "I made sure you were included in Christmas. I wouldn't let him exclude you from something like this."