One for the Road

Sarah and John are on a long drive through the country. When John suggests Sarah give him head while he drives, she worries what the occasional truck driver will think, but complies.

Her worries are quickly forgotten when both are titillated by the thrill of exhibitionism. Their game escalates into ever more exciting behavior. 

What will they do when they eventually stop at the same stop where the truckies have stopped for the night?