A bit of background before I start my storey. My name is Colin (51) I’m 5ft 11”, relatively slim and fit. Jill my wife is 49 natural 36DD, 26, 38, still slim and 5ft 11” tall with 36” inside leg. In past we have had a very good sex life and swung a little bit; however, of late things have got a bit boring. Anyway, last weekend we had been invited to our neighbours annual Christmas Drinks, which in past has always been a really good knee’s up. As we were getting ready for the party Jill showed me her new black dress that she had bought for the do and asked me what I thought of it, “Looks great, really slinky”, was my reply. She then went on to say ”I’ve also bought a black corset to hold my tummy in a bit”. I told her that she already looked great and didn’t need to hold her tummy in to which she said “Thanks but I think I’ll wear it in any case”. I didn’t think that much about it until I came out of our ensuite to see Jill. She was stood with just a little black corset, sheer black hold up stockings and 4”black stiletto’s; her tits looked absolutely fantastic and I also noticed that she had shaved most of her pussy as all she had was a little trimmed landing strip. I could also tell from her large swollen nipples that she was also turned on. “Wow, aren’t you going to wear any knickers?” “I might put a little black thong on as I don’t want to spoil the look of the dress” she said. At this point I went and gave Jill a big hug and kiss and my raging hard on gave away the fact that I was turned on. “Mmmm, maybe later” Jill said as she gently pushed back on my advances. As we were due at the party I didn’t push back but went downstairs to put my shoes on. After no more than 5 mins Jill appeared and we went round to our neighbours house which was a rather grand 6 bed Victorian house that had been very tastefully updated and renovated. When we arrived the party was in full swing with plenty of people enjoying themselves. Our coats were taken by Sue and George our neighbours and Sue told me that as the cloakroom was full they would be put upstairs in the first bedroom on the left. Initially, both me and Jill wandered around the Party together sipping champagne and chatting to friends, but after a while I ended up talking to some Rugby friends of mine and Jill drifted off to talk to Sue and George, our hosts. I do remember at one point looking over to Jill and seeing George laugh out load and then put his arm around her waist and say “Your not kidding” and then he patted Jill on the bum. I didn’t think anything of this, because by all accounts George, who must have been in his early 60’s was a Randy old devil who quite often got very touchy with some of the ladies at parties, especially if the booze was flowing, as it was in this case. Anyway things moved on and I ended up in the Kitchen by all the wine chatting to some other guys, as is often the case at Parties. It was now getting quite late and whilst a number of people had left there was still quite a sizeable hardcore left either dancing or just sitting around chatting and drinking. After a while and not surprisingly, I needed to use the loo but when I got there it was occupied and another chap was waiting outside. It was then that someone said “I’d go and use the loo in the bathroom upstairs if I was you”, by this point I was nearly bursting so I duly went up stairs and luckily found the loo free. It was on my way down the landing that I heard moaning noises coming from the spare room with the coats in it. Whilst I was quite surprised given the type of people at the Party and after all it wasn’t a Swinging Do, I knew exactly what was happening and smiled to myself. I then thought, as the door is slightly ajar I’ll have a quick glance and see who it is. There at the end of the bed and on his knees was George, with his face buried between someone’s stocking clad legs, but because of all the coats piled on the bed I couldn’t make out who the lady was. Intrigued and quite turned on I carried on looking and I then heard Sue’s voice, although I couldn’t see her. She just kept saying “Yes…. go on lick that pussy”, initially I thought he was going down on his wife, but then she changed and said “Now go on Fuck her, Fuck her”. Sue was obviously somewhere in the Room but it wasn’t her on the bed. George then got up and although his trousers were already round his ankles, because of the angle I couldn’t see much at first but it was clear he had got his cock in the lady on the bed and as he swung his bum backwards and forwards you could hear his balls slapping on her ass – he obviously knew how to fuck. Then the angle changed and the lady put these long stocking clad legs right up on George’s shoulders and I gasped as I saw George's cock going in and out of her pussy. I never saw the cock head but at one point there must have been nearly 8 inches of thick heavy veined cock outside the girls pussy, George was certainly one very big boy. He then built up speed again and was certainly giving the girl the fucking of her life. Then the girl propped herself up on her elbows and said " Come on fuck me harder with that big cock". It was then that I noticed the Girl was Jill, my wife!!! I was absolutely gutted on the one half, but also really turned on the other. I know that in the past Jill had been with other guys but that was always at a Swinging Party and I knew all about it, this just seemed different. However, I kept watching and as Jill was writhing under George's huge cock I then heard the slut say" come on fuck me fuck me hard, make that big cock cum, I want see you cum all over my pussy". I then saw Sue who was now right beside George encouraging him by saying " Come George fuck the slut with your big cock, spray her with cum". After a few more seconds George started groaning as he kept humping Jill and Sue said " That's it, that's it now take it out". George then pulled his cock out of my wife's pussy. It was the first time I'd seen the whole thing - it was just massive, at least 10 inches with a huge cock head and Sue could barely get her fingers round it as she wanked the shaft. At this point George started to cum, the first shot splattered all over Jill's pussy and the inside of her thighs. I lost count of how many times George squirted his seed but it was more than five and there were ropes of the stuff all over Jill’s thighs and pussy. Jill then grabbed George's huge cock and started massaging all of the cum into her pussy with it. Although George’s cock was getting a bit softer it didn’t appear to be getting much smaller but I thought this would be it, but Jill then fed George's cock back into her pussy and said "Come on George push that seed deep inside me". George duly obeyed and started a couple of long slow strokes into Jill’s swollen pussy. Jill then sat up and said “Now let me clean that gorgeous cock of yours” As she now sat on the edge of the bed she had her dress up over her tits and you could see her stockings and corset. I did notice as she leant forwards and started to suck and lick Georges cock that her nipples were huge she was obviously still turned on. Finally, Jill licked her lips and said “Come on we better get back to the Party Colin will be wondering where I am” and with that she stood up and rolled her dress down. I then quickly slid away back to the party and after about 5 minutes Jill walked into the Kitchen and said “ How are you stranger”. “I’m fine, how are you? had a good time?” I said. Jill then said “I’ve had an absolutely great time, but we perhaps should think about heading home”. “Ok I’ll just go and get our coats” I said. When I came back with our coats Jill was waiting with George and Sue and as we hugged and said goodbye I overheard Sue whispering to Jill “Ok for next week?” as I shook George’s hand. I didn’t hear a response form Jill but George did say to me “That’s one hell of wife you have there” as we walked through the door. Let me know if you want to hear what happened later.