Then, Remus’s lips parted and he drew Sirius’s index finger into his mouth with the slowness of sweetly dripping honey. He closed his eyes and sucked, swirling his tongue around the tip and dragging his teeth along the pad before drawing it back out, wet and slick, down his lower lip and over his chin. Sirius watched, transfixed, suddenly aware of his stiff cock straining, rock-hard, against his shorts.