“And you’re avoiding your problems again!” Sirius raged, “You always do this and it’s so bloody exhausting! You think you’re being so mature, do you? Keeping everything bottled up. It’s stupid! You’re just making a martyr of yourself, it’s like you want to be miserable.”

“Oh, get fucked, Black!” Remus shouted back. “Easy for you to have a go, isn’t it?! Why do we always have to talk about my shit life, hm?! Mr ‘tell me a fucking secret’?!”

Sirius blinked, shocked, and Remus was elated; he had something now. He had Sirius in his jaws, he wasn’t letting go until he tasted blood. “What about you, Sirius?! How come we never get to talk about your fucked up family, with your death eater brother and your insane cousin?! Why don’t we talk about your pain, and your scars for a little while, see how that feels.”

“Remus, for fuck’s sake--”

“No, I know! Why don’t we talk about your mother?” Remus went in for the kill, and it was more effective than even he had expected. Sirius changed completely; his expression froze, his posture tensed, as if he’d been punched in the gut.

Remus almost wished he had punched him, because then at least Sirius could just punch him back, and they could have a fair fight, and that would be it. But that hadn’t been fair, and he couldn’t take it back.

Sirius gave him a look of utter hurt and shock, before turning quickly to anger.

“Go fuck yourself, Lupin.” He spat, storming out.”