I have read many of the stories on here and found them to be a turn on and got my cock aroused . So i thought i would tell what happened one hot sunny evening with myself and my wife although we was not married at that time.We both worked together in a local engineering company with myself on the bench and my girlfriend in the office. One hot sunny evening after work we drove around to visit my mother who lived local and after a brief visit we went to a local chinese take away for some food. As it was such a nice sunny evening we decided to drive to the local park to eat our food. The local park being Cranford Park. We parked in the car park and nearby there was some picnic benches to sit on.The type that you often find in pubs where there is a table with a long seat either side to sit about 6 people comfortably. Imight add that my girlfriend usually dressed very smart and sexy for work and was wearing a very short tight black skirt and a white cotton blouse which was undone a bit due to the hot weather which was still close to 27 degrees about 7pm in June. We say opposite one and another and proceeded to eat our food which was very tasty. Then my girlfriend said to me that there was a man on a bench about 25 metres away who seemed to be staring at her. I turned around and noticed that he did seem to be looking in our direction and i noticed that he had on tracksuit bottoms and his hands were in his pockets and seemed to be moving about. I wondered what he was doing and then it occurred to me that from where he was sitting and the angle of his bench to ours that he seemed to be looking up my girlfriend skirt and probably had a good view of her knickers which were nice yellow ones.I told her that i think he is getting a good view between her legs expecting her to be annoyed and pull her skirt down and close her legs. Instead though she said to me do you think so and i said yes and then i dont know if it was the heat making her aroused and turned on but she said okay i will give him something to look at and with that she smiled and hitched her skirt up a bit higher and opened her legs wider so he had a better view. I was amazed that my girlfriend was acting like this but turned on a the thought of a middle aged man ogling my 35 year old old girlfriends open legs and knickers . I saw him smile and his hand was in his tracksuit and seemed to be moving about and i said to her that the man was wanking. With that she said i will give him something to wank about and with that she said give me the car keys and then she went off to the car.A few minutes later she came back and sat back down again in the same place on the bench. I asked her what had happened and she smiled and said that she had removed her knickers and the man can see her pussy now which was smooth by the way. I looked over and saw that the mans hand was furiously moving up and down in his tracksuit and he looked quite red in the face.Needless to say that i was really turned on and had an erection myself at how my girlfriend was sitting there with her legs open and brazenly showing a complete stranger her pussy to wank over. Anyway i looked over and the man was wanking furiously and then it looked like he come as he started to slow his hand movements and was very red faced by now.He got up and smiled and then walked away from us and i said to my girlfriend quick lets go home. When we got home as was so horny that i fucked her in the hallway as soon as we were in the house. She was so wet that my cock just slid straight up her and i fucked her bent over the stairs hard until i shot my load up her. That was one of the horniest experiences of my life and i have masturbated many times thinking back to that hot summers evening. My girlfriend later became my wife but sadly we are now nearly divorced but that memory still lingers on.