Regulus wondered what interesting really meant. It seemed the sort of neutral word to be used when one was purposefully trying to avoid saying something else. It was likely that Remus was wondering how long it would be before he died. Perhaps he didn't know that Regulus was already aware of the fact that he had mere seconds left to live.
"I already know I die," Regulus supplied quietly. Maybe it was too rude to bring up such a subject, but he didn't see any point dancing around it at the moment. He looked back down at the ground, unknowingly running his tongue over where James had split his lower lip when he had hit him. It was nearly healed now.
"No," Regulus answered, but realized that sounded rude even if was the truth. He had no idea what sort of conversation he was supposed to make with Lupin. They weren't allowed to discuss the only connection they had. "I just hadn't wanted to interrupt you."