The hum of the engine isn't the only thing throbbing as they cruise along the open road. The passenger's eyes are glued to the driver's curves, her body writhing slightly to the beat of the music. She feels his gaze, and it ignites a fire within her. She reaches over, her hand resting on his thigh, moving upward until she finds his hardness. He gasps, his grip on the wheel tightening. She grins, unbuckling her seatbelt, and leans over, her tongue tracing the outline of his cock through his jeans. He pulls over, unable to concentrate on the road any longer, and she climbs onto his lap, grinding against him, their bodies moving in sync, ready to reach their destination together.