Lucifer's own hips snap forwards even as Dean tightens pleasantly around him only a few more times before he buries himself in deep and fills Dean again. His hand strokes Dean a little longer to make sure that Dean gave everything he could. Then he's resting his full weight on top of Dean to see how he handles it as he rocks his hips forwards at random moments.

"Maybe I should restrain you more often, if it'll get these kinds of results."