We had friends that lived on a large property in the country. Occasionally he would throw a party there. These also involved a large bonfire type barbecue in the clearing surrounded by trees and bushes near the house. These usually began at lunchtime on Saturday and would run through till Sunday evening. On one such occasion, I hadn't been able to get away from work until early evening Saturday. Anne had gone earlier being given a ride by another invitee! When I got there it was already beginning to get dark. I asked the host where any my wife was and was told that she was at the bonfire, so I proceeded to go there. The bonfire was going really well, it is very big and lit up the whole clearing. Seeing Anne on the other side of the fire I went around through the bushes hoping to surprise her. I came out of the bushes behind her went up to her reach around and grab hold of both of her tits. She spun round and struck me, not the reaction I'd expected. Then being up close to her I realized that it wasn't my wife, but somebody that was extraordinarily like her could even be a natural twin of her. I apologized and explained my move. She said that she didn't mind that she understood because she'd met Annie and had herself been surprised by their likeness! When I asked again where my wife was, Julie, as that was her name, became somewhat cagey, saying errr, ah, . .! I when I laughed and said oh I see, she is off fucking somebody as she? She then said' you don't seem to mind at all? I then explained the realities of our arrangement regarding our marriage. Julie then explained that she thought that Annie was off fucking her boyfriend, but she couldn't be sure. She did not seem to be cool with the idea! I then suggested that a tit-for-tat would be appropriate! She laughed at that but didn't reply. She did accompany me to the table where the meat was kept. I chose a steak and put it on the grid over the fire I then went and sat on a fallen log. She came and sat next to me. She then said,' did you mean what you said about tit-for-tat?'. I looked hard at Her, saying indeed I did, you are a very fanciable woman, as you're obviously a double for my beloved wife how would I not fancy you!' She looked into my eyes, squeeze my wrist, and said' eat your steak!'. She then wandered off! As I like my steak rare, it didn't take long for it to cook. It also didn't take me long to eat as I was starving! Just as I'd finished eating, and had got myself a beer, Annie, accompanied by some guy that I didn't know came out of the woods, holding hands! What do you know! She saw me and came over to me, giving me a big kiss. The guy had disappeared somewhere! I asked Anne if she had been enjoying herself, and what was the guy like? Annie then said that she needed to find the toilet, and went off. A couple of minutes later, I got hit on the head by a rather large chunk of a branch that had been thrown at me. When I looked around, I could see that it was Julie hiding behind a tree, beckoning me. So I went to her, carrying the chunk of the tree! I could see that she was carrying a blanket. When I began to complain laughingly about the chunk of tree, she said ' nevermind that, what about this tit-for-tat?' And grabbing my hand led me further into the wood, to a place she'd obviously preselected, possibly even used before for the same kind of event. When we got there she spread the blanket out, explaining that she wasn't going to just lay on the grass, as she did like to be naked when she was fucking, and that she certainly intended to be fucking me! She then stripped! Amazingly, the similarity of her body and my wife's, except that Julie was a little fuller in the tit, was extraordinary! I then, with her help, stripped myself! As soon as I lowered my pants, she was reaching for my cock. ' Oh, goodie, you're not circumcised. It just seems that all the men I meet these days are circumcised. I do like a nice foreskin!' I told her that Annie was of the same opinion! Meanwhile, she had begun making good use of that foreskin, flickering it backwards and forwards, then taking into her mouth. She, on her knees, sucked me like that for about 10 minutes, before saying,' okay, now some tat for tit, come and fuck me, lover!'. She lay back and spread her knees wide, playing with her pussy as she pulled me down between her thighs. She was already nice and juicy, so I had absolutely no trouble at all sliding my prick into her. I fucked her like that for about half an hour! Although she seemed to be quite excited and certainly enjoying my thrusting, apparently she had difficulty achieving orgasm! This did not mean that she didn't enjoy sex nevertheless! But as I hadn't had sex for a couple of days due to my work schedule, I found it easy to shoot my jism into her cunt! It was a warm evening, so it was quite pleasant laying there on the blanket naked, smoking cigarettes and talking. The more we talked the more I got to like this girl! While we were talking I began to finger fuck her a little probing for her G-spot. She certainly got excited, and it would seem that she was going to have an orgasm, it just didn't happen. I thought I should try a little tongue fucking of her, and got down licking her labia thrusting my tongue into her crack in her love hole sucking on her clitoris or at least where it should be I think that the problem she had a very thick clitoral hood. I continued to work away at this. You know how I love sucking cunt. Also while cunt sucking, the actual lip movements can be so much more conducive of clitoral orgasm, so after half an hour of me sucking her cunt, she actually did come to have an orgasm, not a cataclysmic one but nevertheless! I suspected that with a lot more of that kind of activity that kind of orgasm could improve for her! We then dressed and went back to the bonfire. The host had provided several sheets of plywood on the grass for people to dance on, and a sound system, so people were dancing. We join them for a while. Then Annie came looking for me, saying' where were you, I was looking for you!', ' Oh, I was fucking your boyfriend's girlfriend!'. ' Oh, that's what I came to look for you for. I think I should fuck you too, don't you?' ' Oh, in that case, says I, let's get to it!' And we went back into the bushes. Annie went to a tree lay back against it and lifted her skirt to her waist. She, naturally for her, was not wearing any knickers! ' Come on then stick it to me lover' she said. I began to finger fuck her. Jesus, she was full of spunk! I asked her how many men had she fucked today? She replied since I arrived at lunchtime? Three! John, the host of course. It's only polite! Then some other wimp, and Julie's boyfriend. Julie was in my class when I first went to Uni. We used to cause quite a kerfuffle over our similarity. I think it's nice that you fucked her! The party went on till well after midnight. Unfortunately, all the drinks ran out and people started to get sorted to go to bed. I went to our station wagon to get our sleeping bags and blow-up mattresses. Usually in these kinds of situations, if we couldn't find a room in the house or a settee, we'd usually sleep on the floor on our air mattress and zipping both our sleeping bags into one big sack, just in case,. . . Going back out to the bonfire to collect Anne, I saw her talking to Josephine and Jim or whatever his name was! When I got to her she said, ' Julie. has invited us to share their tent! ' Oh, whoopee,' I thought, more Fuckies!'. They'd set up their tent out on the house side of the wood on a piece of grassland. It was a big two roomer. Jim and Josie had the same air mattress sleeping bag arrangement that we did. We made our arrangements with these, a set in each room. They also had kitchen utensils and made us all cocoa. Then, all stripping naked, everybody kissed everybody. There was a little amusing confusion when it came to which of the ladies was going to sleep with which gentlemen, too much laughter. I just got into bed and left it to the ladies to sort it out for themselves. Somebody put the light out, and a female got into the other side of my sleeping bag. I wasn't surprised that it was Julie.! As we'd all had plenty to drink, everybody was fairly tired, so after playing with Julie's tits for a few minutes and kissing her we decided to just go to sleep. I didn't drop for about 10 minutes, and already there were fucking noises that Annie makes going on in the next room! ' Good luck to her' I thought, and then dozed off cuddling up with Julie. Sometime during the night, something woke me up, and I realized that it was Annie's fucking noises going on again. Also, Julie and I had got into a spoons position with her back to me, but she was reaching round between us and playing with my prick which naturally was in full erection! Whether this was just more tit fer tatting or not I didn't care. I found I was feeling quite horny so feeling my way down between Julie's arsecheeks, and inserting a couple of fingers into her cunt I began to finger fuck her for a while! She began to become quite vocal also, but I began to suspect that this was just to balance things out locally between her and Annie, each letting the other know, that she was getting well shafted!! I retrieved my cock, and stroking Julie's crack with it gently easing into her cunt, I began the nice slow fuck that I managed to keep going for quite a while. One could hear Annie screaming away into the night, I'm sure they heard her even in the house which was probably a quarter-mile away. She did like to show off!