Sirius rarely raised his voice, unless truly upset, but it was clear when he was angry - it could be seen in the change in his eyes, tightening of his jaw, his unusual silence.

You had both got in an argument, and you had, admittedly, gone too far, making an unnecessary comment about his upbringing. But you didn't mean it. You didn't.

He had those signs of anger as he leaned against the windowsill, smoking a cigarette, his eyes fixed on something outside, his silence loud.