Not posted for a while but I've been here lurking in the background. I've not had any post worthy things happen until yesterday. I was driving home from town, about five ish miles and thought I would have a wank as I had not done it driving for a bit. I decided to go via an industrial estate to add a bit of time onto the journey and give myself a longer time. I loosened my jeans and pulled my penis out and rounded the roundabout and into the industrial estate. there were quite a few workers about having cigarette brakes outside the factory gates, both men and women. nobody really paid me any attention as I drove by they were all talking amongst themselves and generally ignoring all the passing traffic. I drove along the road quite slowly with my penis in my hand gently rubbing, normally if I'm masturbating in the car I edge often. but this time I wanted to cum. I was tugging quite fast and I didn't notice a wagon in front had stopped and was indicating to turn into a gate on the right. I didn't hit it, but had to jam the brakes hard and the tyres made a little squealing noise. I stopped in the middle of the road and was waiting for the wagon to turn and I carried on taking care of business. I noticed some people at the gate of a factory to my left glanced up when they heard the noise but I assumed they went back to their coffee and cigarettes. I was just about to pull away as the wagon went into the gate, when there was a tap on the passenger side window. I looked across to see three women in hi viz coats watching and the eldest turned and shouted across to the rest of the crowd standing about on the pavement, " it's because he's having a wank" A few started to wonder over in our direction. I just sat there with one hand on the steering wheel and one hand on my penis, I could have safely driven away but I was enjoying the situation a few women and a few me came up one woman cupped her hands to the glass to get a better view . some were uninterested and wondered back to the pavement one bloke called me as pervert. some went back into the factory gate and some others came out, I guess coffee brake change over . one woman asked quite loudly what was happening and someone ( I didn't see who but it was a woman's voice) said "this bloke nearly crashed because he's having a wank" a few laughed and a few started to come towards the car. I saw one of the women was my wifes friend who has been to our house and seen me undressed more than once. I was quite enjoying the attention when I noticed that one of the new people who had come through the factory gates was my younger sister ( by younger I mean I'm in my 60's she's in her 40'S) she looked over and I could tell she was trying to work something out, So I slowly drove away before she recognised the car or noticed that it was me in the drivers seat. I haven't seen her yet but I'm going to her house at the weekend with my wife so I guess I will find out then if she worked out that it was me. (she knows I do the odd gig as a nude butler, but shes never been to a party I've worked at)