At that nod Sirius smiled, his body leaning down to gently kiss Snape on the lips. It changed from hard to soft and gentle rather quickly as Sirius started to ease that long cock into that boy. One hand curled around Snape's leg, digging his nails into it as the other slowly stroked that cock.

Fuck. Fuckity fuck. Nothing had prepared him for how tight Snape was. As Sirius eased the last few inches of his cock into the boy, it was like he was all round him. Connected. Intense. Hot. Tight. He layed his head against Snapes as he moaned happily, but still his hips. He knew Snape needed to get use to him.

"Always knew you were a tightass" he breathed against the other boys lips