My girlfriend Fi slept with my friend Nick back at Uni, a year on we decided to give it another go. It may be best to read ‘Foursome becomes just my girlfriend and our friend’ which I posted on 6 Jan 2017. But to recap my girlfriend Fi had invited our friend Nick and his girlfriend over for a foursome. But after lots of drinks Nicks girlfriend fell asleep, I never really joined in and pretty much just watched as they had sex. After that it was obvious that they liked each other. They did sleep together one other time, that I know off. She went back to his after a night out. I wasn't there but she had called me to ask my permission first. I had agreed and they spend the night and most of the morning together. I'm not sure if they slept together again, at least they have never admitted it. But a couple of times I did see them make out after a few drinks, but it was always blamed on too much drink and for what ever reason, it never become awkward or led to arguments. Either way, it all stopped when we left uni... This is what happened next, I’ve tired not to elaborate too much and just filled in the odd gap in my memory (as I'm writing this well over a year on) also It might be obvious now, that I like sharing my girlfriend but at the time I didn't even know it was a thing. As I said, this happened just under a year after the first time, we had left Uni and were living in London in a tiny one bed flat. We had found good jobs, though mine had long hours and a lot of trips away. Over that year I gradually realised that I got turned on thinking about my girlfriend having sex with my friend, but for a long while kept it to myself. I finally told Fi one evening after a bottle or two of wine. I'm not sure why it took me so long or why I was worried, seeing they had slept together before. I guess it was a new fantasy for us and I wasn't sure how she would take it. We were on the sofa, touching and teasing each other, when I started asking her what Nick was like in bed. If she was surprised she didn't show it and although she had forgotten lots the details, described what she could remember. Afterwards she started to question me, what I enjoyed and more importantly, what I got from it. I tried to explain (though I'm still not sure) and we continued talking about her having sex with Nick over the following couple of nights. Until finally, she asked me outright, did I want her sleep with Nick again? I was hesitant, but agreed that I did. I still remember the excitement in her eyes, as she realised that she would get to enjoy Nick again. But, she said, because I was Nicks friend, I had to ask him... I had stayed in good contact with Nick, in fact we had become good friends. I knew he fancied Fi and always talked about her. We were a few drinks down at the bar, when I decided to ask Nick if he was up for it again. Only I wasn't sure how to come out with it. I mean, how do you invite your friend over to have sex with your girlfriend. Even if its not the first time. So I waited until we were good and tipsy. Then starting showing him some pictures of our recent holiday to Spain, letting him scroll though my phone on his own, knowing what he would find. He eventually came to a picture of Fi, in a tiny black bikini, sunbathing at the beach. She looked amazing, her skin completely bronzed, all apart from a small white tan line around her bottoms, only slightly visible because she was wearing her bikini so high on the hips. I remember the excitement in his face and of course he complemented her gym toned body. He continued and in the next photo she had removed her top, revealing her small but tanned breasts. His excitement grew. Then in the final picture, her bottoms were gone as she laid completely naked on the beach. Her legs slightly apart to show off her smooth body. Fired up from the photos we spoke about the night Nick had slept with Fi without me, then using the opportunity I told him about my fantasy and asked if he was up for it again. Nick was really cool about it and didn't judge, even admitting to me how much he wanted Fi again. He was more then willing but only if she was. I told him to text Fi and ask her, but we were free the coming Saturday if he was. Fi and Nick had always been flirty but after inviting him over, their texts became outright dirty, they even sent a few pictures. I had set this up for my own pleasure but was in no doubt they would enjoy it more. It was all agreed for Saturday night, Nick would come round 11ish for some drinks and we would 'see what happens'. This gave Fi a few day to ‘get ready’ as she said. Which entailed a trip to get some new cloths so she would feel ‘sexy’. Like she needed to, she was 21 and stunning, she looked sexy the second she woke up. When Saturday came about, Fi bathed, and spent an age on her hair and makeup. I kept her company while she got ready and I remember watching her shave, knowing it was for another man. She decided on a new extra small black silk negligee to wear. The sort that starts just above the breasts and ends just after the bum. She got the matching underwear set as well, but decided not to wear them because they stuck out and looked 'weird' under the negligee. She often went without nickers on nights out, so they didn't show through her tight dresses. When she was finally ready she looked stunning, with dark smoky eyes, that made her look incredibly sexy if not dirty. We sat down with a glass of prosecco, waiting for Nick to turn up. When the door bell finally went, Fi got up to let him in. I remember wondering if should stop it, she was my girlfriend after all. But my heart was pounding and I was already starting to get turned on. After a few minuets Fi returned with Nick, his huge grin was already smudged with her lipstick. I honestly could not believe they had kissed already. Before I could think of a comment, Fi grabbed us all, very large, drinks and we sat down on the sofa to chat with a bit of music in the background. Over the next twenty minuets or so we drank a bottle between us and flirted, but didn’t get any further. I remember starting to get worried that we would never start or get too drunk by the time we did. Until, Fi announced she would get us another bottle, it was only just in front of us on a small low coffee table. As Fi got up I saw that her negligee had ridden up just above the bottom of her bum cheeks. She noticed as well, but instead of pulling it down, she rolled her hips as she walked the couple of steps to the coffee table. Then with her legs slightly apart, she bent at the waist to grab the bottle from the low table. Pausing as she bent over, just long enough for Nick and me to have an amazing view of her ass and even a light glimpse of her pussy from behind. The ice was broken. On returning to the sofa to sit between us, Fi's dress had ridden up almost to her waist, leaving her bottomless. She sat there, completely on show, as we continued drinking and flirting. Gradually Nick started to touch her leg. Then slowly he brought his hand up her inner thigh, as he got higher Fi opened her legs slightly until his fingers brushed against her shaven pussy. Gently at first, just teasing her, then more deliberately he touch her until she moaned. They started to make out as she fumbled with his cock through his jeans. At first I watched their lips touch and the passionate kiss that followed, I've always been turned on by watching them kiss. Then I looked down to Nicks hand and saw as one finger slipped inside her, making her twitch, followed by a second. As he pulled them out again and I could see they were soaked already. I’m not sure who started it, but we all ended up standing. Fi in between me and Nick. She was taking it in turns to kiss each of us and remove our clothing. Then Nick pulled Fi's small silk dress over her head. For a moment she just stood there touching her own body, enjoying being naked in front of Nick. She worked hard at the gym and loved to show off. (She always does when she gets the chance) I removed my boxes as Fi gently removed Nicks. I saw her staring at his impressive hard cock as it Jumped free of his boxers. We pushed Fi between us, facing Nick so my, now hard, cock pressed between her bum cheeks. We spent some time touching and exploring her body. Eventually, Fi dropped to her knees, between us. She gave the head of my cock a quick kiss and turned her attention to Nick. She kissed to side of his long shift from base to tip then opening her mouth wide, slowly took inch by inch. Not managing all of it, but giving it her best shot until she almost chocked. I got the same treatment soon after, before she started taking us in turns. A hand on each of our cocks and her mouth swopping every few seconds. I could’t believe what was happening and made the most of watching friends cock vanish between my girlfriends lips. After a few minuets she got off her knees and sat back on the sofa, her legs open and giving us a dirty come get me look. I sat on the sofa next to her and starting to play with her small but perky breasts, gently rubbing her little pink nipples. Nick was on his knees in front of Fi, pulling her legs apart. He kissed up her thigh until he was between her legs. He teased her at first, then licked her faster and faster until he was using his fingers on her as well. I watched him while sill playing with her breasts. With this much attention it didn’t take her long until her hips were twitching and she called out in pleasure. He had made my girlfriend cum. She was still panting as he pulled her flexible legs even wider and positioned himself between them, still on his knees. I sat back and watched as the head of his cock brushed her pussy from bottom to top, continuing up her stomach to the belly button. She had always told me that it was Nicks extra width that made all the different and not the length, but right then as I saw how far it was about to go inside her, I wasn’t convinced. Nick lined his cock up to the entrance to her pussy, rubbing it up and down to get the head as wet as possible. Then deliberately, he rolled his hips forward. We all watched as the shaft slowly slid inside her. Fi was panting with a look of pleasure and a bit of pain. He pulled his hips back until the the head almost showed, already wet. He then gave it to her, over and over getting faster and faster until she put a hand out on his chest to slow him down. And I watched as my girlfriend took the biggest cock of her life… again. I’m not sure how long they stayed like that, but eventually Fi stopped him and climbed down to the floor on her hand and Knees. At first her head was towards Nick and her ass towards me. I lined myself up and started to take her, doggy style as she sucked his cock. I could’t believe how different she felt, so wet but so lose. It did’t take long until I saw them look at each other and him grin. Without warning she moved, letting me full out as she turned 180 degrees. She grabbed his cock from between from her legs and backed onto him, moaning as she took him. She did try to suck me a few times but soon gave up. I was happy to watch and soon just sat on the chair, which was behind me and looked her in face as my friend fucked her from behind. She had a look a pure pleasure as she panted and pushed her ass toward him. Nick Had one had pulling her long dirty blond hair and the other gripping her waist so tight, his fingers pressed into her skin, only releasing to slap her ass. I could tell it wasn’t very comfortable on the floor and told them to go to the bedroom, I would grab the wine and follow in a second. Without any hesitation they were gone. Their naked bodies disappearing out the door. I took my time to compered what was happening and made sure I was enjoying it, I was. Then followed them. I paused outside the bedroom door and listed to Fi moaning, by this point she was even talking dirty with Nick. (She loves to tell him how big he is and how much she needs it) After a few seconds I entered to see Nick lying on his back, on the bed, as she straddled him. I watched from behind, her hot round ass bouncing, his cock appearing and disappearing into her. After watching them for a moment from the edge of the bed I asked Fi to turn around and take him reverse. She knew I had wanted this and changed position almost immediately, turning around. To tease me, she held his long cock at the entrance to her pussy, rolling her hips so she rubbed against the head. She bit her lip and inocently asked me to come closer. Then she lowered herself, slowly taking his cock until nothing remanded. She moaned and for my pleasure, took him from base to tip again and again so I could see in detail as she fucked my friend. I was close enough to see the vains stick out from his throbbing cock, shinny with Fi's wetness. But I remember being fixated on her pussy lips as they were stretched wide. Then taking every inch of him, she started to grind in a figure of eight. One hand playing with a nipple. She kept telling me how big his cock was, how good it felt. Finally she let out a loud moan, her legs twitching and stopped dead. My girlfriend had just cum, sitting on my friends cock. After cumming Fi basically fell off Nick, lying next to him with her legs spread wide. He climbed between them and effortlessly glided inside her. He was going very fast, each of his strong thrusts punctuated with a moan from Fi. Her feet gradually lifted from the bed until her legs were in the air. Then she wrapped her arms around Nick and held onto his muscular back. After a few minutes she started to tell him how much she wanted him to cum. Upon hearing this, Nick got even faster, until finally he called out and gripping her tight. Fi gave her biggest moan of pleasure that night, as she felt my friends cum fill her pussy. After a few seconds to recover she came over to me, sweaty, her hair and makeup a complete mess. I laid back and she lowered her cummy pussy onto my cock. She was so wet and loose. After a little while I flipped her on her back and didn’t bother to control myself, leaving a hudge load inside her as well. The three of us stayed in bed, talking and drinking a little more wine. We invited Nick to stay for the night, as by now it was getting late. It was so natural, all three of us lying there completely naked for what felt like hours. Nick and Fi were not shy and seemed to have no problems touching and kissing in front of me. Of course the talk was sexual and Nick eventually got hard again. He was lying on his back as Fi sat on her knees next to him, one hand stroking his now hard cock, the other between her legs, pleasuring herself. This was as much an erotic sight as seeing them kiss or the reverse cowgirl. My girlfriend gently fingering herself, right in front of my friend while he watched. After a bit more forplay and a quick suck of his cock to get it wet. She looked at me and with a kind of shrug lifted herself up to straddled him. She held his cock with one hand and lowered herself easily onto it. Then with two hands on his chest she grinded on his cock. After a minuet or two she got faster and faster, accationaly lifting herself up to take him from base to tip. His cock was of course socking wet. Fi rode him for ages until Nick pushed her off and cimped between her legs. Gliding inside her effortlessly. Then after five or so mineuets, Fi asked him to stop, telling us she was too swore. Instead she sat next to Nick and gave him a long sloppy blowjob right in front of me. I just watched as she used her lips and mouth on the top half of his cock and her hand on the bottom half. When he came, she did try to swallow it but at least half ended up on her lips and cheek. It was so hot, to watch my girlfriend wipe my friends cum from her face, with her fingers, into her month. We fell asleep naked, exhausted but fulfilled, Fi in the middle. I often lay my hand between Fis legs but that night she kept pulling my hand away. It turned out, when I asked the next day, that Nick already had his hand resting on her used pussy. They were already touching each other and kissing by the time I woke up. As I came too fully, Nick climbed between her legs, under the covers and I heard her unmistakable moan as he entered her. After a few seconds the bed start to moved with his trusts. l went to have a shower, it feeling completely normal to leave them to have sex alone. I had a long shower and was only just getting out as fi walked Into the bathroom, followed by Nick. Both completly naked and his large cock still hard. They jumped in and continued against the wall under the water. Fi's back against the walk of the shower, one leg lifted up and supported by Nick. I could just see his ass move as he thrust into her, again and again, until the steam fogged up the glass. I left them to it again, her moans of pleasure following me to the other room, she is always nosey when having sex. Eventually they both came into the bedroom, wrapped in the towels. Nick got dressed and Fi put on one of my teeshirts that almost covered her bottom half. We spoke and laughed (with some bad headaches from all the drink) until Nick left soon after. When we were left alone, I turned my attention to my girlfriend, her pussy still full of my friends cum. While having sex and messing around, we spoke about the night, and morning. We told each other how we felt and I suggest she should see Nick again. I had oddly found leaving them to have sex alone, such a turn that I wanted it to happen again. We came to the conclusion that Nick didn't count as cheating and as long as she was honest with me, should could do what she wanted with him. This arrangement worked very well and they saw each other every week or two for a few months… Until Fi started to ask if someone else could be counted as not cheating, but thats for another time.