Regulus smiled, because he wasn't in a rush to die. He simply refused to deal with anyone until he could confirm this story, or more likely prove that it was false "Then, you're free to do what you deem necessary, Healer Davis."
He looked over to where Jake was doing Slytherin knew what. "Are you two married?" That was such a shame, but he could still amuse himself.
"I'm sure he does, and I'm sure you have a paper ready to show me. It's not like you could make it with magic after all," he said sarcastically. "Let's keep the talking for after I speak with Narcissa."