Sirius just laughed again. "Why the fuck should I have said anything to you? Our parents gave you whatever you wanted. They didn't lock you in your room, you didn't get shouted at incessantly.." Sirius shoved Regulus halfheartedly, "Don't you dare bring the Potters into this. They were better to me than Walburga and Orion ever were. You were the golden child. You even joined those fucking Death Eaters to make them happy! Or did I make you do that too?"
He poked Regulus in the chest again. "Don't act like your mistakes all stem from me leaving. I'm not responsible for you, Regulus. You could have left anytime. You didn't answer me, I can't read your fucking mind, you daft prat."