He wants to watch you masturbate for the entire journey.

"I would love to play with her sir, but I cannot stop driving....The meter would keep running and I would get into trouble. My cab is tracked by the company you see."

"Ah, yes that is a problem. What if we took the quiet side streets, and you watched her respond to every command you give her?"

You flush. He intends for you to masturbate to entertain the driver! He begins to slide his hand further up your leg, this time pulling the hem of your dress up with it. You sense the cab driver focusing much less intensely on the road as he clears his throat. After a moment of hesitation, he finally begins to speak.

"Miss, would you lower the top of your dress?..."

You comply, knowing that your Master has offered you, and now this driver is in total control of you as well. As you do, your breasts become exposed to the cool, air conditioned air in the car. You feel your nipples stiffen, and your pussy begins to show signs of arousal at the humiliation.

"She will do whatever you demand of her. She is my slut, and I have offered her to you. Please, humiliate and use her as you wish. She must be taught a lesson. She understands this, and will not deny you without risking punishment."

At this, a note of lust and hunger creeps into the drivers tone. "Pinch your nipples. I want to watch you masturbate in my rear view mirror for the rest of the drive."

You feel a blush creep up your neck. You shamefully begin to pinch your nipples, pulling them and twisting them. You feel them fully harden, and you feel your Master take his hand away from your thigh.

"Touch your clit. I want to see you right on the edge of cumming..."

You slide a hand down over your ample breasts, pulling the hem of your dress up. As you slide it over your ass, and expose your panties to the driver, you hear a sharp intake of breath letting you know he has a good view. You begin to slide your fingers down the front of your panties, but you feel your Master pulling your panties down. You redden, understanding that he wants you to put on a good show. You pull your panties off, placing them on the seat beside you. Spreading your legs, you begin to gently massage your clit, breathing quickening as you feel the familiar rush of excitement. You speed up your ministrations, throwing your head back and spreading your legs wide enough to give the driver a full view of your pussy. You hear the cabbie shifting in his seat, smiling to yourself imagining the discomfort he is feeling in his jeans. You feel yourself close to cumming, and your Master knows you are close.

"Stop immediately," you hear him say. "He said on the edge of cumming. You do not have permission to cum. You know better than to cum without asking."

Ashamed, you raise your eyes to the cab drivers in the rear view mirror. Looking as **** as possible, you begin to beg the driver to let you cum.

"Yes, you may," he says. Just as you begin to feel relieved, he continues."But I want you to cum while I fuck you."