They had been out with some friends, enjoying the local nightlife, and were now no their way home. Throughout the night, he had been teasing her. Discreetly running his hand between her legs, casually reaching over and rubbing one of her breasts, brushing his lips across the back of her neck as she stood talking with her friends. The end result was that she had been worked up for the better part of the evening, and could barely wait to get home and rip his clothes off. Every time she had tried to play back with him that evening, he had just given her "that" look, and she had stopped. It was a game, and she knew he was aware of how much she enjoyed playing it.
Now as he was driving, she placed her hand on his thigh, lightly rubbing it. She saw him smile and turn his head slightly, then refocus on driving. Oddly, the traffic was still heavy, despite the late hour. Deciding to discard subtlety entirely, she moved her hand up and felt his hardness. Now she reached over with her other hand, and began unzipping his fly. When he didn't protest, she reached in and pulled him out. Her hand wrapped around his erection, and when she stroked her hand up and down its length, a few drops of pre-cum seeped out. She traced her fingers up across the head, and began spreading the pre-cum across the head of his cock. She closed her hand around him again, and using his own natural lubrication, began to stroke him. She had to twist in her seat slightly, and he moved his hips a fraction to help her get the angle she was seeking.
She looked down again at her hand working him. She watched the way he looked in her hand, now slick with his juices. She found her other hand sliding between her legs and begin to play with her clit, and for a moment lost track of what she was doing. When she looked up, she saw that he had cocked his head slightly and was glancing at her playing with herself. "Make yourself cum."
She released her hold on him, and focused her attention on his direction to her. She knew better than to disobey, and frankly, was so worked up from the evening that she had been waiting for permission to cum for some time. While she wanted to stretch out the pleasure and let this orgasm build slowly, in no time at all her fingers were flying across her clit. Her free hand moved up and began playing with her nipples, and her breathing became labored. She could feel herself getting close, and as it began to approach, she heard his voice. "Stop."