Sirius smirked as he was hauled in. His hands going to Snape's robes straight away, tugging them off before doing the same thing to Snape's shirt. Buttons flying everywhere as he kissed and nipped his lips.

He'd know about the bathroom and the magical room because he's brilliant. Don't expect him to give up all the Maruders secrets.

His hands scratch down his front, before pinching a nipple hard.