Regulus stepped in further as soon as Remus mentioned it, although, of course, he knew he didn't need the other's permission to be inside the bungalow. Now that their greetings were dispensed and they were still within the same physical area, Regulus was lost for what he should do or ay next.
"When are you from?" Regulus asked, simply because he was actually curious. He knew it was something of a dangerous subject - he didn't know if Lupin would bring up whatever had happened to him, since it obviously wasn't good. Although, he rather suspected that Lupin wouldn't react nearly as strongly as James. He supposed it was also fair to mention that he had something more of a tie to James than to Lupin.
At the same time, he could only wonder when he would have a run-in with Sirius. After all, he had seen James - and James kept nothing from Sirius and he now lived with Lupin. It was only a matter of time.