Note: This story was dynamically reformatted for online reading convenience. I thought I'd start with the disco as the feelings I felt at that moment are still most pronounced even though what followed was more blatant: The scene I witnessed that evening took its toll on me and despite the feeling of misgiving that was overtaking me my erection grew embarrassingly hard. Tania smiled at me but continued to allow her partner to press against her as they danced slowly about the room. I knew I'd lost when with one final glance to me to make sure I was still watching she leaned in and kissed him. The kiss lasted forever and I could see her tongue duelling with his as he ground his erection against my wife's abdomen, his arousal so acute he couldn't hold himself back. She parted and said something to him and he stopped his movements, turned to give me a sickeningly cocky smile then continued to cling closely to my wife. She gave me a triumphant look then whispered something else and he nodded. They kissed again as they danced and his crotch ground at her more and more only she seemed to stop caring. There were a few looks from those near to them but there was enough activity on the dance floor to keep this to just the immediate few. Eventually after several slow dances the music went up a notch and before I could react Tania broke from him and took his hand leading him away from the dance floor, and me, towards the back exit. I was momentarily stunned then I began to follow only they were much closer to it and as a chaperone I was over to one side anyway so I had to work my way around. I found myself at the fire exit door over a minute later than them and exited to see nothing but the blackness of the night. This was a nightmare. It had started off as a sort of dare; Jason, the teenage boy my wife was kissing was the son of a friend who had come to stay with us for a few days from America and the disco was a local village hall event which we'd suggested he go to to give him something to do on the Saturday night. His father was attending a function in London so he was alone with us, except he'd asked cheekily if Tania could go with him. It seemed almost a sweet request when he'd made it that Friday morning when we'd told him about the dance, only that night Tania had joked that he wanted to bed her to which I laughed; a very stupid thing to do. "Don't think I'm his type?" She retorted. "Not at all he's just a little young!" I replied. "You mean I'm too old!" She stated, to which I nodded my head. "For him yes." "So you don't think he wants this to be a date then?" She added. "A date? Of course not!" I scoffed. "I'm Twenty six not sixty six!" Tania replied clearly annoyed although I thought it ridiculous. "Yes and he's not even fifteen!" I responded shaking my head. "If you were ten years younger you'd be too old for him! Besides, Tom would hardly approve!" " "Well I don't think Jason thinks that!" She snapped now genuinely angry. "And Tom won't be here!" "But Jason's so young he probably gets an erection looking at shapely table leg!" I replied ungraciously trying to be amusing. "I wasn't talking about erections, I was talking about attraction. He's a good looking lad and I know he finds me attractive, let's face it he spent most of the past two evenings chatting me up! Anyway I think I will go with him to the disco!" "Fine! But you'll look a right idiot, a teens-only disco with some old woman in the middle of it, grabbing hold of a fourteen year old!" "Everyone always tells me how very young I still look, so now's the chance to see if I can pass as under twenty!" She gave me a hard stare not liking the `old woman' taunt. "You must know he fancies his chances? Tell you what come along and see if I'm not right!" "Right about what? Like I said I'm sure he'd happily go with you but he's too young and frankly would chase anything he could. I wasn't aware he was flirting with you? But anyway..." "But! I'll have a wager with you mister but! I'll go with him and if they challenge my age you win. If not I'll go in with him, as his date! Besides he looks and acts older than fourteen so you can watch and learn. Tom was telling us what a great mover he is and has more than a few girls after him!" "Whatever!" I snorted. And we both turned away from one another to sleep. The next day Tania went shopping while did some football training as Jason slept until late morning. Tom was around until mid-afternoon so we all ate lunch together before he left us to go to the hotel he was staying at for his evening in London. His wife was meant to travel with him but at the last moment she'd been forced to pull out and his son had worked at him until he agreed to bring him instead mainly because Tom had the ticket paid for and it was easy to transfer it. After Tom left I noticed how Jason studied my wife and later she told him she'd be going with him that evening, if he wanted to go, his reluctance faded and he jumped at the chance. So at five to eight she reappeared in shorts with black tights and ankle boots plus a loose, dangling jewellery and makeup. It was that moment I realised she did look sub twenty and I fretted. She breezed in with him looking every bit his date rather than a twenty-something married woman and that was when the lady at the door asked if I was there to help chaperone. Christ I don't look that old but being late twenties I suppose I could look thirty-ish but still too young to be a teenager's father, so I thought. The woman clearly didn't think so, I guess since I'd turned up with people who had gone inside. I was about to tell her no but then I decided yes and agreed to help for a couple of hours so I could keep an eye on them since I didn't trust Jason at all. I was thankful we are almost unknown in the village because my wife was soon dancing happily with Jason and no one seemed to see her as anything but a teen. Worse was the fact that as the evening wore on I could see them drawing closer as they enjoyed each others company. Eventually the music went low and the slow dances began and that was when they kissed. I now stood at the back of the hall wanting to go find then but aware immediately that one of the other helpers was at my side suggesting we close the doors again. I said two had gone out but he answered tough and did it on his own. I was left even more on edge than I had been. It was strange but ever since the boy had appeared I was aware Tania had changed, that is to say she was acting more like a teen around the boy than my wife. The disco had another thirty minutes to run but I managed to slip away, out the front then skirted the building without finding them. I could drive home but it was a twenty minute walk so didn't think they'd be making for there, certainly not just yet. I decided to head into the scrub ground between the hall and the allotments but it as very dark and I nearly tripped so slipped round to the gate at the end and looked in. Nothing. I walked back to the hall and it was as I came back via the car park I realised with horror my own car was gone. I'd not been aware Tania brought a set of keys but she obviously had and was already home by now. I tried to phone but it just rang and rang so in the end I was forced to walk as it was just as quick as getting a taxi. I was hot and bothered when I finally got home and came in with a crash of the door. I felt sick with fear as part of my mind was already telling me that she'd fallen for the boy and I was in trouble. I went to the front room but it was dark so went upstairs and then I heard them. Tania was mewing and gasping and I could here the steady rhythm of the bed springs as I got closer to my own bedroom. Inside my wife was on her back legs wrapped about the boy who seemed totally at ease with the situation. His broad frame pumped into her not seeming to care that she was my wife. She looked at me first, letting out a little sigh and without a pause urged him to keep going. He did pause, very briefly, to give me a very sickening nod then pulled back exposing a very long, very thick and very hard cock that stretched the condom tight (ones that I found were more than ample) before telling me `she loves it', ramming it brutally into her. "Oh! Fuck yes!" She moaned. "Give it to me! Fuck me, Fuck me!" She stated obviously as she seemingly hit a climax. I stood like a fool as she kissed him then looking at me as he still banged away at her she stated; "Told you he'd bed me! Now fuck off so we can have some time alone!" She kissed him again and they ignored me totally. This wasn't my wife as I knew her; language or actions. I was unable to move for a long time despite the fact that neither of them seemed to care that I was there at all. Jason mumbled something and she replied she'd had the hots for him since he arrived as well. Then she added she'd wanted to `have him' for the past three nights! That was finally enough so I left them, firstly to sit morosely in the front room staring at the TV without really watching it then after a brief check to find them still at it; it was clear he really was in our bed for the duration, I was forced to use the smallest spare room; where he had been originally. I slept badly woke early and crept into my bedroom again to see my wife still wrapped about the boy both half asleep. I went down and made coffee then sat reading the paper fretting. I heard them an hour later; Tania screaming for him to `fuck her hard and make her cum'! I had a football match at ten but when it got to nine and she was still fucking I was forced to go up. "I've got a match." I stated coming into the room then stopping as I saw Tania face in his lap his very large cock in her mouth. "Fine by us!" She replied pausing but still holding his cock. "Actually a good idea because It's been a bit off-putting you sneaking about trying to watch us all the time!" Jason snickered but I ignored this and got ready, not that my heart was really in it. I left at nine thirty sick about what was happening since when I briefly put my head round the bedroom door Tania was riding him and she looked straight at me as she told Jason she wanted to fuck him all day until his dad got back! I didn't linger at the game but came home quickly and was back before one, just an hour before Tom was due back. I got home to find Tania on all fours in the front room, wearing a sundress, back flipped up with Jason going at her hard. It was as if my entrance spurred them on, which actually in hindsight it did, because they went faster and my wife yelled at Jason to bring her off again. She had what sounded like a huge climax as I walked out barely able to look. It was another hour before Jason finally finished with my wife leaving for a quick shower almost as Tom arrived back at our front door. I went in to find my wife only to discover her sitting on a sofa flushed from the strenuous sex with the extremely pungent odour of sweat and semen about her and wet patches on her dress from the perspiration and cum. With makeup smudged and her wild hair there was no doubt what she'd just engaged in, I don't think I've ever seen anyone who looked quite so `freshly fucked'. She ignored my pleas for her to go change her only concession was to clean her face a little in the downstairs bathroom as Tom came in. He gave Tania and I a look then chatted about his previous night before asking his son who had just appeared, well scrubbed, if he'd had fun himself which got a big grin and an `oh yes!' Tom then asked him if he'd met a nice English girl and he nodded giving my wife a swift smirking glance. The next half hour was embarrassing as my wife sat her thin dress hinting at her lack of underwear and her dishevelled look plain to see. Eventually, and with some relief their taxi arrived to take them to the airport and after a brief goodbye they were gone. "So did you enjoy watching me fucking?" Tania asked with a smile as soon as they drove away and she steered me into the front room where the stench of sex clung to the room. "No!" I stated pointedly. "But you had a big hard on all the time!" She teased. "I saw it!" "That's just a physical reaction to seeing sex. Doesn't mean I enjoyed it." "Rubbish! And I certainly did!" She added. "Quite some boy!" Good job they are going back to the US otherwise who knows where it would have led to!" "Why did you do it?" I asked. "Actually it was something his step-mother revealed. When I spoke with Pam on the phone last week she mentioned she was glad he was going to be away for a few days. She told me he's become addicted to sex and spends most weekends after girls. Pam's quite liberal, being English I guess, but she told me she was fed up a different girl sleeping over every weekend and some of them our age!" She looked at me as she sat opposite her dress showing her erect nipples letting me know she was getting turned on again. "You know he's been trying it on with her as well! It's true, she told me. I mean when they married Jason was already twelve and with Tom being eleven years older than she is he has mentioned to her recently that he is closer to her age than his father! Only just of course but she let me know he likes to show himself off to her occasionally. That's was when I got excited about him visiting because she actually apologised in advance because she mentioned that he was a big boy and that he'd probably be flaunting it a bit so she hoped it would be ok." "Did he?" I asked foolishly. "Well if you mean him standing naked Thursday morning in front of me with his ten inch hard on pretending he didn't have a clean towel then yes!" She laughed at my expression. "You and Tom were both off to work and I was about to leave as well but I have to admit he is something special, not just the cock but his whole persona; arrogant, inventive and quite dominant and the best man I've ever had sex with!" "So you decided Thursday you were going to have sex with him?" "No, well not exactly. Thursday evening I came home and he made it clear he expected to bed me but I played it cool and managed to dampen his ardour a little only that evening you and Tom stayed up until late and I was reading in bed and bold as brass he came into our room and stood in just his trunks chatting to me. He more or less suggested we have sex but I just about resisted and it was then he asked if we could go out Friday." "So the disco was his idea?" "No mine. It was a way of putting it off but I knew that if I went with him we'd end up having sex only I didn't realise just how insistent he'd be or how good either!" "So what now?" "Nothing! I don't intend to suddenly throw our marriage away over a teenager with a big dick! Only he's very, very arrogant and I'm sure he'll tell everyone about how he had sex with his step-moms best friend from England in front of her husband. He'd probably have mentioned it to Tom except I told him I knew he'd fucked Pam!" "He hasn't!" I gasped. "Not that she admitted to but the way he responded to the threat I suspect there just might be something in it. Anyway he's gone." "I don't want you to do that again!" I stated. "I don't think I could standby and accept it..." "Nonsense, you did yesterday. You let him seduce me then use me like a common whore for the whole night! You left me with him this morning knowing full well he'd use that time to do a complete number on me yet said nothing!" "What's that supposed to mean? A complete number?" "Look!" She sat forward and pulled the dress up over her head. I stared at her body and gasped: She had bites over her breasts and both her nipples were swollen but it was her sex that I noticed most; her pubic hair was matted and her lips were still pouting showing the unmistakeable signs that they'd had unprotected sex. "Christ Tan!" I yelled. "Well what do you expect leaving me alone with a very dominant guy like Jason? Like I said before; it's a good job he went home today otherwise he'd have really turned me into a complete ho!" "But you did him..." "Bareback! Yes he insisted the moment you left us alone this morning. I just couldn't stop him and after the first time there was no point." "But what if you get pregnant?" "We should have sex now just so you have a crack at my eggs as well, just in case!" "I... we don't want kids just yet!" "Would be a bit of a pity given we want to save up to move next year but if I am then that's fine." "But what if Jason's the father?" "We'd never know. He's not that different to you, except his great body but that is just because he works out all the time. It's only the size of his cock that is really different so we'll be able to tell if we have a boy and he ends up with a very big penis!" "Stop it!" I yelled almost in tears. Tania looked at me then shrugged. "Sorry but Jason did something to me this weekend. He woke me up, the sexual part of me that is. I realised I was a sexual woman again, something I've not been since before we got married. Do you know what? I like the idea that Jason screwed me and that Tom will probably find out, it turns me on and even more now I know Pam's fucking both of them! I'll tell you what I really want! I want Jason to come back through that door to take me, here now, in front of you, his big cock fucking me again and again. I want him to cum in me and give me a baby!" She was moving her hips as she spoke as her thighs rubbed together. "I want him to come to stay for a month next time and do me continually, night after night until I can hardly walk properly!" She looked at me then slid onto the floor. "Come on baby, stick it in me and try to give me a baby of your own. Hard and fast now or I might go and find another teen to fuck!" So I did and we were at it hard for maybe ten minutes until we hit a mutual climax. Tania held me tightly then began to sob into my neck. I could not get anything sensible from her for ages until finally she disappeared to get showered and came back looking fresh and clean. "I love you and I'm sorry!" She stated. "That was so nasty, so horrible and so erotic I'm finding it hard to get my head straight but it's over with!" We didn't mention Jason at all for the next six weeks or so and eventually when we did Tania laughed her time with him off, as `just letting her hair down one last time'. Nothing like this has happened since although Pam has invited us to stay next summer and I know Tania is keen. I'd like to as a visit to the states would be a great holiday but am worried that, the would-then-be seventeen year old, Jason would take advantage of my wife again. She seemed to have little resistance around him when he was fourteen and Pam tells us he's `gotten a whole lot worse' with the girls since then!