Sirius' confession visibly sent both Remus and Lily out of their train of thought, having to take a moment to piece together what Sirius had meant by that. It was Remus who first put two and two together, and the way his smile widened with pleasant surprise, one would not think he was ever going to tell Sirius anything.<br/>"It really takes the punch out of your insult when you don't even know the surname of the flatmate you're insulting," Remus countered, more outward showing humoured than ever. As if it to make a point, he added with a grin, "Sirius Black."