11 years of cheating

My wife and I had a very active sex life, but it still wasn't enough for me. We even went to swingers parties and had a lot of friends who were into the scene, but still I always craved more pussy than my wife was able to give. It wasn't that she was a bad fuck or anything, just that she had given birth to 4 kids and as soon as she got wet, it was kind of like fucking a bowl of custard.
For our daughters 17th birthday, we had a big party with not only a lot of her friends in attendance, but also parents and friends of ours, including some of our kinky friends. As the night wore on and the alcohol flowed freely, the quieter people left and the party started taking a slightly wilder turn. It wasn't long before one of my wifes friends decided it was time to skinny dip in the pool and as she stripped her top off, every set of male eyes was on her, including many of the boys my daughters age. Several people at this point got offended and decided to leave, but after that it was open slather and everyone was soon getting naked and diving in the pool.
Several of the boys in attendance took the opportunity to get close to some naked women, but nothing was happening for any of them besides a few embarrassing boners. A small group of the girls also decided to join the fun, and one of them, Ainsley, was a frequent visitor to our home and had often stayed over. My wife thought of Ainsley as sort of a surrogate daughter and we were quite good friends with her parents, but they were not at the party this night. Ainsley was a really nice girl, who wasn't quite sure where she fit into anything, not in the in crowd, but not in the out crowd either. We had known her for a bit over 2 years and she had always been that girl who was slightly chubby, but in a cute way and recently had begun to dress in a slightly slutty way, I guess to try and attract some attention. My wife and I knew that she and our daughter would sometimes stay up nights and chat on cam with guys, but that was as much as we knew really.
When she stripped off, I couldn't help but look and was taken by her perky breasts which were already quite a nice size and her hair covered pussy which looked so inviting, as did all the other pussies in the pool, but this was a girl I knew well but never in this way before.
Games were played, inappropriate gestures were also made and some spurned, others laughingly dismissed and others encouraged by the recipients. During the frivolity, Ainsley came close to me and my wife and during all the thrashing around I would feel an occassional hand or arm brush my semi erect cock and I was never sure of who it was brushing against me, but as I got more aroused, I thought more about the young body close to me and was soon fit to burst. Suddenly a hand wrapped firmly around my cock and gave it a couple of tugs and then my wifes voice was in my ear saying she wanted it inside her so bad and couldn't wait until everyone left.
Eventually pretty much everyone left, with the exception of a handful of the kids and one of our kinky friends who was going to stay the night with my wife and me secretly.
During the night I had to get up for some water and as I headed to the kitchen, I passed the lounge where Ainsley was sleeping and gave her a glance in the hope of seeing some more of her young flesh exposed, but she appeared to be asleep and fully covered by her blanket. As I was standing in the kitchen, suddenly she appeared next to me, scaring me half to death, and she also got a glass of water and the 2 of us began quietly chatting about mundane stuff, then she said she could hear us in the bedroom and knew we had someone with us. I freaked a bit thinking she might spill the beans to our daughter, who to this point had been naively unaware of our extra activities. I was pleasantly surprised and not a little turned on when she said she thought it was awesome and couldn't wait for her 18th birthday in about another 8 months, so she could do that sort of thing. I couldn't help myself and began to quiz her on what interested her sexually and what experience she had had and was delighted to hear she had been with several guys, but was sure that there was something better waiting for her.
I told her there certainly was and she was going to have a ball in future, but I had to get back to the bedroom before someone got suspicious I was up to something and she gave me a little smile and said goodnight and to have fun and off i went back to the 2 women waiting in my bedroom.
The following day is the day I consider the start of an 11 year long affair with Ainsley. It began with a simple flirtatious conversation around lunchtime as we were all recovering, where Ainsley asked if I was worn out from the bedroom. Smiling I said to her that I was never too worn out for sex and she replied that she could tell. I was a little confused and at this point we were interrupted by my wife and daughter, so I didn't get to persue the issue. Later in the day as we were all quietly relaxing and dozing by the pool, I was startled by my phone notifying me of a text message. I picked up the phone and there was a message from an unknown number and it simply read, "I liked feeling your cock against me". I replied with a question as to who this was messaging and simply got back "guess".
I sat wracking my brain as to who I had fooled around with in the pool the night before, and as I sat there I got another message with a picture attached. I opened it to see a closeup of a juicy cunt being spread open by two fingers and it was obviously wet and ready for a hard cock to slide deep inside it.
As I lay there on my deckchair, I quickly looked up to check what everyone else was doing, in case I got busted with this text and with the growing bulge in my shorts. My wife was under the shade at the end of the pool, fast asleep and my daughter and Ainsley were across the pool from me, also reclining on chairs. My daughter also appeared to be asleep and it looked like Ainsley was just dozing on and off as she shifted occassionally.
I sent a reply to the picture, saying it looked lovely and ready for a hard cock and I wished I was deep inside it, but i still didn't know who it was and would they tell me. After sending the text I put my phone aside and looked across the pool and noticed Ainsley had raised her knees and her legs had fallen slightly apart. My gaze was fixed on the mound between her thighs and suddenly I realized she was looking at me and I quickly looked away, hoping I hadn't been busted. I picked up my phone and was looking at the picture again, when my phone buzzed once more with a new message, "enjoying the view?". My heart leapt into my chest as I suddenly realised who was messaging. I looked across the pool and Ainsley was staring at me with her legs spread and her phone in one hand. She lifted her head and looked over at my daughter next to her, then looked over at my wife and then pulled the crotch of her suit aside, exposing her gorgeous wet pussy to me. My cock was so hard now and my heart was racing. This cute as fuck young girl was basically inviting me into her. I looked over at my still sleeping wife and quickly got up and headed inside before anyone beside Ainsley could notice my bulging shorts. As I stood in the kitchen looking outside, Ainsley got up from her chair and as she did so, my daughter stirred and asked her where she was going. Saying she needed the toilet, Ainsley headed towards the house and my daughter settled back onto her chair, but was clearly now awake.
Ainsley came into the kitchen and I said she was going to get me in a lot of trouble if she continued with this stuff, and she asked if I wanted her to stop. I said no I didn't but if anyone found out, my life would be over. If she was 18 it would not be a problem, but until then, I knew I was in serious danger. Telling her this, she said she knew, but she could wait until then, so long as we could still flirt a bit and do harmless stuff in the meantime.
So for the next 8 months we would send texts, share the occassional sneaky kiss or peek at each other, all the while building a frustration that both of us yearned to break. She was interested in every little detail of me and my wifes swinging exploits, and how many people we had sex with and i was equally turned on by her telling me about who she was fucking during that time.
Ainsleys birthday finally came around, and her parents threw her a big party to which we were invited. Unlike the party of 8 months earlier, this one was quite subdued. Ainsley had a boy there, who was her current guy and he would hardly leave her side all night, so I was unable to get her alone at any time. I had opted to be the sober driver and my wife was having a good time getting pretty pissed with Ainsleys parents. One of Ainsleys friends was due to be picked up around midnight, but her dads car had broken down. As I was one of the few adults not drinking, I volunteered to run her home. Ainsley seized the moment and said she would come with us so I didn't have to come back alone, and jumped in the car before her boyfriend could react and we were off.
We drove the 20 minutes to drop her friend home and then quickly drove to a nearby park where we were unlikely to be disturbed. Knowing we couldn't be too long, we were quickly at each other, mashing our mouths together, our tongues intertwining, our hands finally free to roam to all the previously forbidden places.
We each quickly removed our pants and after looking to make sure we wouldn't be seen, we got out onto the grass and lay together expectantly. 8 months of pent up frustration ached to be set free. My cock was throbbing and harder than I ever remembered it being. As I reached down to part her pussy lips, her heat and wetness was on my fingers. I placed the head of my cock against her opening and began to press inside her. She was so tight and wet and I could feel her pussy gripping my cock as I pressed deeper inside her. The heat of her pussy was astonishing as I began pumping in and out of her, her hips thrusting up at me as she tried to get more of my cock inside her. We quickly grew more frantic in our pace and she began saying into my ear that she was cumming. I was also close as I had been holding it back, but as soon as she started to cum, her pussy began squirting around my cock and I lost control and began pouring a torrent of hot cum inside her. My orgasm took over everything and my head swam as I experienced the greatest orgasm of my life. It felt like my cock was never going to stop spurting my semen into her glorious pussy.
I grabbed a towel from the back of the car and we quickly tried to tidy ourselves before dressing and heading back to her house, my wife and daughter and her boyfriend and parents.
From that moment, we took any opportunity no matter how short, to fool around with each other. Sometimes it was easy, other times it was very risky.
Family get togethers and parties, it would be a quick kiss here or there or a quick fingering for her or a rushed cock rub for me. We would often have sex just before or just after she would fuck whichever guy she was seeing at the time. The day of my daughters wedding, we somehow managed to fuck while the photographer was getting a setting right and my wife was gathering family and Ainsley ended up standing in all the photos with my cum running down her leg under her bridesmaids dress.
And so we come to 11 years after it all began, and tomorrow Ainsley is finally getting married and my cock is sticky with our mixed juices as I write this and she sits beside me, full of my cum which is oozing out onto the bed from between her legs and we try to think of a way for us to fuck on her wedding day.
I will shortly head home to my wife and will probably still be crazy horny for Ainsley and fuck my wife while thinking of her delightful pussy and all the fun that is yet to come and all the cheating yet to be done without either of our spouses knowledge.