John groaned when he saw Sherlock move. He got up and made his way over to the bed. "You're going to fuck me while being fucked." He took Sherlock's cock in hand and lowered himself down ok it. He gasped when he felt it breech him.

Oh.

He shivered and released Sherlock and pushed down until his arse met the vampire's hips. Fuck. He was full. So full. John reached under them to turn on the vibrator before he started to ride Sherlock in earnest.