I had known Tina since secondary school. In fact my first sexual experiences were with her, not that she was my girlfriend. She didn't have a real boyfriend and just went with whom she fancied at the time. Then I went off to university and lost contact. Six years later I moved back home and joined a new company close to my old home. I had been with them for almost a year when It became apparent that they were in trouble with one of their larger contracts. Although it was not my bag to hold, I took a look at their problem and it was similar to a problem I had worked on in University. I spoke with the boss, Simon, and told him I may have a solution. He moved me onto the project as team leader. It took six weeks and we cracked it and was on target again for the project completion date. Then after the project was closed and signed off the company was given a further project only bigger. I was immediately put in charge. The boss was so pleased with everyone's commitment that he organized a large Christmas party. All four teams were invited to a hotel with their partners for that party with an overnight stay thrown in. I was on my own as I had not got a girlfriend as I had spent too much time working to socialize and meet a nice girl. The party was great and I met all the wives and was shocked when my boss walked in with Tina, his wife. She looked like a rabbit caught in headlights when she saw me. Simon didn't see the shock in Tina's eyes. I said hello and then walked on into the main room. Later Tina came to talk to me. We sat for nearly half an hour talking about old times. Then we agreed and I went to my room and Tina was at my door about ten minutes later. She was still a great fuck and It felt even better knowing I was fucking a married woman and better still my boss's wife. I fucked her in several different positions before we both came. Then she dressed quickly and scurried off back to the party before being missed. I rejoined the party later. There was one woman there that was in another team and she like myself was on her own. Well we ended the evening in my room and Gail gave me a blow job not knowing that my cock had only a short while back been in our Boss's wife's pussy. Then I went down on her and gave her a good tongue lashing before pinning her legs beside her head and fucking the hell out of her. Next morning I again screwed her before we went for breakfast and our own ways. She became a fuck buddy as and when we both wanted some company. Work was going well although our turnover of staff was too high. Simon floated an idea to me, that instead of working a forty hour week he was proposing to reduce our hours to thirty six hours and move us onto four nine hour days. I was obviously in favor as it would give more free time. What he wanted was to spread those days over Monday to Saturday and stagger it between staff so we had a constant number of staff working at any time. The one downfall was that he wanted team leaders to be contactable on any day off that fell on the Monday to Saturday, although he didn't expect, or need many, if any calls. He wanted me to sell it to the staff. It didn't take much selling and we were soon on the new pattern. For selling it I had a fixed day off rather than a rolling day like the rest of the staff. A few days later I was just leaving work when I saw Tina waiting for Simon. I suggested that we got together on my day off and she was quick to agree. She arrived at my house and as soon as she was through the door she had her tongue in my mouth and my cock in her hands. I had her tits out and fingers in her fanny. We were soon on my bed where I licked her to several orgasms and Tina teased out and swallowed a load of cum. Then when I recovered I fucked her in doggy position to another good orgasm before I dropped a second load deep inside her pussy. From then on we met on my day off and as her house was more comfortable we shagged in her spare room. This continued for about five months. Then one day I was fucking her and nearing orgasm when my phone rang. It was Simon, her husband and my boss. We had an issue at work and he asked if I could come in. I finished fucking his wife and made my way in to work. The problem was a large one and I ended up working solidly for two days to overcome the issue. Disaster averted I sat talking with Simon who floated another idea to me that our parent company was looking to selling our division. Simon floated that we do a buy out and take what staff we want with us. I agreed and we put planning into action. We finished the contract just days before we registered our new company and talking to the company the contract was for they gave us their latest contract and said more was to come. We took just ten staff with us. We arranged that Simon and I split hours so one was always in work when the staff was in. This left me still with three days off, but not the fixed day I previously had. On my next day off I turned up at Simon's house and caught Tina being shagged by someone I had never seen before. She got rid of him and we sat talking. I'm not into sloppy seconds and although Tina wanted me to shag her I wanted to know what was going on. She fessed up that she had five men lined up for Monday to Friday and she kept Saturday and Sundays for Simon. I had turned up on someone else's day. Tina was still the slut she had been in high school. She told me she would change her days to fit me in. It also transpired that one of the men in one of the other teams in our old company was also shagging Tina. The others I didn't know. Things settled back down with Tina fitting her other men around my days off. Then Simon came into work one day slamming things around. He had caught Tina fucking one of the other men. Phew thank god it wasn't me! They had a furious row and Tina walked out after telling him he didn't meet her needs in bed, and without other men she would have to leave him. Simon was gutted. He said he was considering having an open relationship with Tina so he didn't loose her as he still loved her. He asked me what I thought. It was hard telling him yes when I already knew that was what she was doing and I was part of it. I told him that seemed a reasonable option if he didn't want to loose her. Then he asked If I would consider being her lover. I coughed as he asked me. I told him I thought she was a gorgeous looking woman and I would most definitely consider sleeping with his wife, if she would want to sleep with me. He packed up his desk and brief case, then went home. The following day he told me that he had a long talk with Tina and floated his idea with her that he would allow her to see another man if it were me. She reluctantly agreed with him, saying I might not fancy her. Inside she was cheering she later told me. Then things were set up. I was allowed to shag Tina on any days that Simon was not home. I was pretty sure that Tina was still seeing other men, but I now had free range to shag her when I could. So even if Simon walked in on us I was covered by his plan. I thought that all was well and Simon seemed pleased that life with Tina had settled back down or so Simon thought. From my point of view I was able to shag Tina two or three times a week with impunity. Then on a days I was working with Simon he asked, could he ask me to do something for him. I told him yes. Then he asked me to please not screw his wife in his bed. He was still happy for me to screw her, but not in his bed. After that Tina and I used their spare room. This lasted for eight years then four years back, he again caught Tina fucking someone else and this time he kicked her out. She moved in with me and I agreed she could see other men, but I didn't want any sloppy seconds and she could not see others on my days with her. That was over four years back. Guess what? One of the men she sees regularly is Roger. What a turn around.