Regulus snorted and winced in one movement. "If I wasn't fine, I wouldn't be here right now," he countered. Though admittedly, the only reason he was here was because of Kreacher. However, he wasn't going to admit that to Dorcas. Admitting that would be admitting things he didn't want to talk about. Not until later on at least, when things were less troubled.
He picked up the vial she threw on the bed. As Regulus examined it he too looked to the door and was slightly relieved when Kreacher came back into the room. Regulus knew how much Dorcas hated the elf but in this moment he was hoping he could use that fact to his advantage. Especially since Kreacher wasn't exactly fond of Dorcas either.