I wrote about how my wife Sue and myself started swinging after she set up a scenario with James and Helen at which I could have showed my displeasure at any time and it could have been laughed off. Instead it was the start of a very enjoyable time with the 4 of us but for me that was enough. What I didn’t know was that Sue was not content with our occasional 4’somes but was also screwing with others. It was a few months after the start with Helen and James that I first got suspicious when I noticed a love bite on her breast. I remarked about is and she laughed and said “Oh, that was James last Saturday”. I thought it odd that it was nor Thursday and I hadn’t noticed it before. I then started noticing other little signs. She had always gone out several evenings a week to Book Clubs, NHR and other innocuous clubs etc. but sometimes she was back very late and always because she had got talking or went for a coffee with the girls afterwards. OK, but it seemed to be happening more and more often. Also, although we were not having sex more than 2x per week, I noticed that her pussy lips were often looking puffy and loose, even on mornings after we had not done anything and realised that these were mornings after she was very late home. I didn’t know what I thought about her possibly cheating on me. Our 4’somes were Ok because we were both involved and they were enough to satisfy me but what if she was cheating with others? I found the thought both depressing and exciting and decided to play detective. Tuesday nights she always went to a book club. She used to be back soon after 1000 but lately it had been nearer mid-night. went down to the venue just before 10 and sure enough, a bunch of people, mostly female, came out at 10 O’clock but not Sue. She got back at 11:30 saying she had gone on for coffee with some of the girls. Thursdays had always been NHR at different houses and again, she had been getting later and later back from this. It was supposed to be at a friend’s house so again I waited and everyone came out at about 10 but not Sue, she got back at mid-night. This time I decided to have it out with her. I showered and got into my dressing gown and then waited up until she got home. She was surprised and even more so when I said Hello darling, I am so horny I have been waiting for you so we can have sex. She tried to say she was too tired but I pulled her down onto the sofa and started snogging and undressing her. Her cunt was soaking – “gosh, you are wet” I said. “Yes, that is because of the surprise welcome she answered, now fuck me” I usually tongued her pussy before fucking but she stopped me and said “No, just fuck me, I am ready for you”. I guessed this was so I wouldn’t taste another man’s cum on her. Anyway, we did have a great fuck and I said nothing. This became a new lifestyle for us. She would come home Tuesdays and Thursdays and I would wait up and we would fuck. She was always very wet and very aroused and I never said anything. The excuses for being late were as lame as ever then one Tuesday she sent a text saying she had had too much to drink at Wendy’s and was staying overnight. This then started to happen every week or two and if I offered to fetch her she would say not to bother as she would be OK in the morning. I would be at home, pacing up and down and feeling terrible that the woman I loved was cheating on me but at the same time I would be rock hard and almost always would jump on her as soon as he appeared, however late it was. Anyway, she hardly bothered to be discrete anymore yet neither of us mentioned what we both knew. She was fucking around and I was turned on by it. Every year her company used to have a Christmas party in a local hotel to which spouses were invited. She said to me that I needn’t come this year as she knew I couldn’t dance and would be bored like last year however, I insisted on going. After the meal she went onto the dance floor while I joined a few guys at the bar. I watched as she a slow dance with a guy and realised they were grinding their genitals together – “looks like Sue will disappear soon” laughed one of the men. “What do you mean” I asked, knowing he did not know who I was. “Oh, he said, Sue is the office nympho; she will get fucked by at least 5 of us guys tonight, even more if she takes 2 at a time. We have booked a suite in this hotel for her to use. Her poor sap of a husband might be around somewhere so we must be careful. Do you want me to introduce you” “Yes” I said, “OK, when it is my turn I will take you to the room with me, she loves having 2 guys at the same time” I knew this because of the times we spent with Helen and James but I had thought we were the only people she played with. The dance was ending and I quickly went back to my seat. Sue came over and said “Darling, You stay here but I don’t feel too well so I am going to our room to have an hour lying down. Don’t come up ‘cos I want to sleep for a bit”. I expressed sympathy and Sue disappeared, and so did the guy she had been dancing with. I went back to the bar and saw the dancing guy return after about 20 minutes and another one go. 20 minutes later that chap came to my new friend at the bar, grinned and said “She is hot tonight, your turn” “Come on” he said and I followed him to the room. I kept behind him as we went into the bedroom and there was Sue naked on the bed “Hi Dennis, come and fuck me” She hadn’t seen me ad I kept out of sight while Dennis quickly stripped and got down between her legs. I habe brought you an extra cock Dennis told her to which she replied “Oh Goody, the more the merrier, Where is he”. “Here” I said moving into view. Sue gasped but still carried on fucking “Oh dear” she said “Well I guess you would find out sometime so don’t be a nuisance, come and help Dennis fuck me” And I did.