For a few years us and a few other friends had been going out for drinks and meals. To dances, and to parties. My wife’s best friend had always let me know she liked me. She was a woman with a plump but not fat body. She was average looking. It became a bit of a joke. Waiting to see her making a bee line to sit on my knee. She always did it. My wife and her husband joked about her doing it. My wife was pretty with a nice slim figure. She knew that her friend was not a threat. She changed from only sitting on my knee and nothing else. To sitting astride my legs facing me. At times pushing her ample breasts in to my face. When she was sitting down. She would put both hands down and press on my penis. This had been happening for years. I was getting a bit fed up with her doing it. Every year over Christmas they held a party. We always went to it. It was in their large house. The main party was held in the large lounge. It was large and wide. But at one end there was a narrow part. Where the kitchen extended in to it. There was a wall between that area and the kitchen. In that area it was always left dark with no lights on. A few kitchen chairs were lined up against the wall. They were for people to sit and rest. I always moved to sit here late in the night. My wife could party all night. She loves to dance. I could see her under the lights in the main part of the room having fun. I spotted our friend heading towards me. I knew what she was going to do. I was going to teach her a lesson. Hoping to stop her in the future. I sat with my knees together. Letting her sit astride them. She moved right up to me and as usual she pushed her boobs in to my face. I opened my legs as wide as they would go. Forcing her legs apart. I put my hand between her legs and fingered her vagina. She was wet. She let me do it. She was quietly moaning. I realised that she was enjoying me doing it. She leaned close to me and kissed me. Then she was whispering in my ear. She telling me if i didn’t stop. She would have an orgasm. Everyone would hear and know what i was doing. I stopped. As she was getting up. She whispered. This is not finished. I took no notice and soon forgot what she had said. In July her husband asked me for a favour. He had been offered the loan of a touring caravan. I liked to tinker with cars. He asked me to fit a tow bar to his estate car and wire it in. We arranged for me to do it on my days off. I worked long days and long nights. At the hospital. Having my days off at any time of the week. We arranged for him to leave his car at home and have a lift to work with his friend. On the day he parked it half in his garage. Leaving room for me to work under the rear of the car. In case it rained. He would not be home until after 6-30pm. I pulled my car on the drive. Taking my tool box and my crawler. In to the garage. I knocked on the door and his wife asked me in for a coffee. She was still wearing her nightdress and her dressing gown. We sat and talked for a short time. She asked me how long it would take. Saying that she would keep me supplied with mugs of coffee. I said i would tell her when i was close to finishing. True to her word she kept the coffee coming. She came out to ask if i was nearly finished. Did i want another coffee. I told her it should take about 15 minutes. She said in that case she had time for her to shower and to get changed. When she returned she was wearing a dress. I was nearly finished. She went in to make a mug of coffee. When she came out with my coffee. I sliding from under the car and taking my rubber gloves off. She put the coffee down and crouched over me. With my face under her dress. When i looked she was not wearing knickers. I reached up to touch her pussy. She put her hand in my shorts and touched my penis. Telling me. At Christmas i told you it was not over. She asked me if i wanted to go in the house. I followed her in. In her lounge she told me to sit on the sofa. She went upstairs. When she came back down she was naked. She was plump she had big boobs and a hairy vagina. But she was sexy. She sat astride my legs and pushed her boobs in to my face. This time i sucked her boobs. I put my hand on her pussy and rubbed it. This time she was moaning and had an orgasm. When she stood up she wanted to go upstairs. We went to the bedroom. I undressed and joined her on the bed. We had sex. It was only the first time. After that. When i could visit her and her husband was at work. We had sex. My wife has never known.