I pretend not to notice.

Despite an initial twitch when she first touched your thigh, you decided to try and remain calm. Just act casual. Pretend it's no big deal, as if it wasn't the first time a woman had touched you in that sort of way.

It is very stimulating, and you find it harder and harder to control your penis from... well... getting harder and harder.

Despite your attempts to hide it, you can tell she knows you are getting excited. She doesn't utter a word, still keeping an eye on the road. He stroking becomes more intense. Her fingers now lightly brushing over your bulge.

She continues this for a good few minutes as she drives to some unknown destination.

You had now long past a direction you would have taken to get home, but your mind was focusing on other things at the moment.

She seemed to be slowing down, and you thought that perhaps you could take control of the problem down below, but that was when she suddenly placed her hand directly on your bulge, no more stroking the thigh, she was now lightly squeezing and letting go, then squeezing again to a consistent pace. He thumb slowly edging towards the top button of your jeans...