This happened to me the other day coming home from work.
I was sitting in the traffic and we were moving very slowly in the rush hour, I noticed this guy in his van behind me looking at me in my mirrors and was wondering what he was thinking, I thought I would tease him a bit and started playing with my hair and looking up into my mirror, this got me to wondering if he was maybe sitting with a hard on or just checking me out.
With me teasing him I felt myself starting to get a bit horny and slowly put my hand up my skirt and just slowly caressed my pussy as we drove along. I could feel myself getting nice and aroused and wet as I gently rubbed myself.
It was a great feeling knowing that there was this guy just behind me and he was not aware of what I was doing to myself.
I eventually arrived home totally horny, drove into my garage and closed the door behind me, I stripped naked in my car and imagined him with me, I caressed my breasts as my nipples were hard and started to rub myself to an amazing orgasm. I didn't bother getting dressed that evening and stayed naked in my house just spoiling myself every time I felt the urge.
This was such a great evening I can't wait for the next traffic jam to start all over again.