"Damn it, Harry, I know he's changed. We damn well wouldn't be talking if he hadn't, now would we? And we are talking. But he's still Regulus." If he wasn't, Sirius realized, this wouldn't be an issue at all. "Look, what do you want me to do? I've invited him out for drinks, including when I didn't need anything. I've written him for advice on an Arabic thing. I invited him over to Christmas dinner. If you want him here more often, you invite him."
Regulus? James laughed at the back of his head. You invited Regulus to Christmas dinner? Pull the other one, Pads!