Use your hand some more

You slowly stroke his penis with your soft hand, up and down, up and down. Applying only a small pressure to start, just enjoying the feeling of the warm skin in your hand. You make long drawn strokes, really feeling all of his length, starting from the base, your wrist rubbing against his balls, and slowly going up again. Once you reach the tip, you only hold it between your fingers, almost letting go of it before starting your journey back down.

Feeling mischievous, you kiss the tip while looking up at the driver, seeing his flushed cheeks under his domino mask, his low groans of pleasure a clear indicator that he's enjoying your ministration.

You pepper the underside of his cock with small kisses, slowly going lower with each one until the entirety of his erect penis covers your face, your lips levelled with his smooth-shaven balls. You start to rub him faster as you kiss them, one after the other, still looking up at him. His eyes are closed, his hands twitching at his sides as if he was barely restraining himself from grabbing your head to make you follow his lead.

You want to see how far you can push him and peek your tongue out of your mouth, giving his right ball a long lick. A loud moan is your reward as his fingers finally start to thread through your hair, idly playing with them.

You switch to his left ball but this time you try to take it in your mouth, gently sucking on it while moving your hand faster. His grip on your hair tightens a bit, but not painfully as you keep switching between the two orbs, licking and sucking them while your hand keep moving up and down, twisting over his cock that is now wet from the precum you smeared over it.