Initially, we began circulating as a foursome (Bill and Jo, Sue and I) but after a while Jo took Sue by the hand and led her off to meet someone else. Bill and I carried on talking to the same group and, whilst moving on to someone new, Bill leaned over to me to explain that Jo is bi-sexual and she was clearly leading Sue away from me with a view to having some fun with her later. Ooh, that would be fun to watch, I thought to myself. Bill had introduced me to most of the people there, mentioning that my wife was somewhere over there with his wife when we met the younger couple that I had noticed when we first arrived. It was one of those moments when, from my perspective at least, it was instant attraction. They introduced themselves as Chris and Katie, explaining that, although they were not total newbies, this was the first time they had attended a house party, which I said gave us something in common. Katie was wearing a white dress which emphasised her slim figure and my immediate thought was that she was utterly gorgeous. After a few moments, I thought that my body language was showing my thoughts too much and I ought to step back a bit, but she moved closer to me and began responding to my body language in kind. Bill obviously noticed what was happening, said something about getting some more drinks and went off to the kitchen. While I was talking to Chris and Katie, I noticed Sue walking towards the stairway arm in arm with Jo, closely followed by 2 young men. It crossed my mind that I should be thinking of my wife’s safety but nothing was going to tear me away from the lovely Katie; I reasoned that Jo would look after Sue, in more ways than one, and carried on talking to Chris and Katie. After a few minutes of conversation Katie stepped back and Chris leant towards me to explain that his wife had a thing about older men, she clearly was attracted to me and would I like to accompany them upstairs. Almost speechless I nodded, they smiled to each other and we all began walking towards the stairs. They led the way into one of the bedrooms and, as Chris turned to lock the door behind us, Katie turned to me and we were instantly locked in a passionate kiss. They seemed to know what they wanted as Chris stepped forward to unzip the back of his wife’s dress, before sitting down in the chair in the corner, and she began undoing my belt to extract my ever-growing cock. In no time at all, my trousers and pants were on the floor and Katie was wanking and sucking me like there was no tomorrow. Realising that I could easily cum too quickly, I lifted her up and moved the shoulders of her dress so it fell to the floor. The only underwear she had on was a white thong and hold-ups. She was super-slim with very small breasts, although her nipples stood proud longing to be sucked. We kissed again passionately as I manoeuvred her onto the bed, frantically trying to remove the remainder of my own clothing. I slid her thong down and knelt between her legs gazing at her shaved pussy. I thought briefly that I had died and gone to heaven before realising that it was real and dived in to lick her clitoris. Her moans confirmed I had hit the spot and, as I realised I could carry on for quite a long time without cumming, I decided to give her a good seeing to with my tongue, and plunged into her juicy pussy. After a while, I noticed that Chris had joined us on the bed, now naked, and was kissing his wife passionately and giving her delicate breasts a good seeing to. I noticed that, from time to time, Katie would hold Chris’s head away from her to concentrate on the orgasm I was giving her down below and then she would kiss him with greater passion as I allowed her to recover from her peak. Eventually, Chris looked at me and said “I think she’s ready, you’ll need a condom”. In the time it took me to pull a condom from my trouser pocket and roll it on, Katie had moved over into a kneeling position and was preparing to give Chris a blowjob. As I approached her she turned her head and simply said “I’m very wet, so straight in”. She was certainly very wet and my cock slid straight into her very welcoming cunt, as she groaned and said “Oh yes”. Katie slurped on Chris’s cock with some enthusiasm before turning to me and saying “give it to me hard” to which I responded by slamming into her vigorously. Katie was in seventh heaven, she came again for the umpteenth time and it became too much for Chris as he unloaded into her mouth, which prompted me to empty my load into the condom. This seemed an appropriate moment to slide out of her and I lay on my side facing them; Katie lay facing me with Chris spooned into her from behind. This gave me the opportunity to play with her delicate little nipples and she sighed appreciatively. Chris decided that it was time for him to fuck his lovely wife and, having lifted her leg, he slid into her thoroughly wet cunt and began pumping gently. I realised that I could also contribute to her pleasure, so I slid my hand down over her belly seeking her clit, which I grasped gently between my fingers and thumb. Chris realised what I was doing, put his arms round Katie and rolled over onto his back, still inside his lovely wife. Her clit was now fully exposed to me, albeit with her husband’s cock buried deep in her pussy and I couldn’t resist the desire to kneel up and apply my tongue to her. The effect was electric, she immediately started gasping and had the most enormous orgasm. From time to time, my chin or my tongue would brush against Chris’s cock but he just carried on pumping into Katie’s soaking pussy. Katie’s orgasm seemed to go on forever, so I was not too surprised when Chris orgasmed too. As they both seemed exhausted, I rolled over onto my back and they separated too. For a moment, I thought Katie was going to climb on top of me, but she simply wanted to kiss me again and thank me for the fantastic time she had enjoyed. This made me feel really good, a beautiful lady barely half my age with the body of an angel had enjoyed sex with me, I felt like a sexual athlete! After we had laid there a while to calm down, we cleaned up, dressed and returned downstairs. Walking down the stairs with my arm round Katie and hers round me made me feel 10 feet tall, like a gladiator entering the auditorium. I resumed circulating and chatting to people. I noticed that I couldn’t see Sue or Jo but didn’t worry too much as the party was starting to get into the swing and people were shedding their clothes downstairs. Janet the hostess had seen me coming downstairs with Katie, which seemed to have given her an impression of my sexual prowess, so was keen to take me upstairs again. She was like an older version of Katie, super-slim with small breasts and a big sexual appetite. Despite being very different to my wife of over 40 years, I found fucking her very enjoyable and, having emptied my balls once with Katie, I found I could go on for ages with Janet. She wanted me to take her up the arse but I resisted as, apart from an experiment when we had been married a couple of years, Sue and I had always shied away from anal sex. After we returned downstairs, it was well after mid-night and the more extrovert guests were doing what they enjoyed most. One very large lady who I guess was aged about 50, was sitting on a settee naked with a naked man of similar age either side of her mauling her ample breasts and alternately kissing her. In front of her a much younger naked man was kneeling on the floor with his face buried in her pussy. She could barely concentrate on kissing the 2 men as she wailed out the orgasm she was enjoying from the 3rd man. As I stood watching the fun on the settee, I felt an arm slide around my waist and a kiss on my cheek. I turned to realise it was the lovely Katie, so I responded by putting my arm around her and kissing her on the lips which were so soft and inviting. Just as I was thinking I would like to strip her there and then, she explained that she and Chris were heading home. As they turned to leave, Chris thrust a slip of paper into my hand and said “call us some time”. And with that, they were gone. It was then I noticed Sue and Jo coming down the stairs arm in arm, closely followed by 2 young men, but I was fairly sure they were not the men I had seen following them upstairs a couple of hours earlier. (To be continued)