"Just don't stop," he answers, a little breathless. He doesn't have much leverage, but he still tries to push himself back against Draco, a silent urge for him to move.

When he actually starts moving, Billy can't do much more than drown in the sensation. He manages to bite back on a soft cry that rises up at least, squeezing his eyes shut to focus on how Draco feels, on any noises that he makes.