Lucifer rolls his hips forwards in a middling pace, unerringly hitting the best spot for Dean with each thrust as he leans forwards to lay lightly on Dean's back. Not enough to force him to support both their weight, but enough to make Dean extremely aware he was there.

"Let the way this feels move through you and let go," Lucifer murmurs in Dean's ear as one hand goes under Dean to wrap around Dean's cock to start slow strokes. "You know you want this; allow yourself to enjoy it."

Convincing Dean to give in now will make prying the information he wants out of him easier later, since by then there will be a certain element of why not tell him what he wanted to know.