"I know what people would think of men like you. It's what they think of me, remember?" Sirius scoffed and then met Regulus' eyes. Brother. "I'll have to let people know, Regulus. And you are wrong anyway. This is the Order, you wouldn't be the only member with a mark."

Not that he was about to say Snape's name, but he wouldn't just leave that out either. "You being alive means that this place is compromised. If you don't join us. If you don't let me know who you are allied with."