Five or six years ago I had an affair with a girl (let's call her Sam) I used to work with, I had been having problems at home with my marriage and she had been having problems at home with her boyfriend, we both confided in each other about our problems and things just started from there. First of all it would just be a kiss and a fondle in the back of car or in one of the empty offices on the upper floors, then it moved further to mutual masturbation, then finally we would meet at her house when her boyfriend had gone to work or if we felt horny during the day, in one of the empty offices, because of my position I had the only keys to those offices so there was no danger of someone disturbing us. Sam was 18 years younger than me, very slim, lovely tits (32C), with long blonde hair. Our affair went on for just under 2 years or so until I changed jobs, we kept in touch via facebook but didn't meet up again for sex. Eventually my wife, Amy, and I worked things out between us and Sam and her boyfriend got married. One night in December, while Amy and I were having sex, she asked me what my fantasies were, I told her that I had a couple of fantasies, one was to have a 3sum (either MFM, but I'd prefer a FFM). The second was to fuck a pregnant woman. Amy then said that when I'm licking at her pussy, she imagined that it was a girl licking her and had always fancied trying a bit of girl on girl sex but never knew where to find someone as all her friends and the girls she worked with weren't that sort she thought. I said 'so you're serious that you would want sex with another girl?' Amy said 'I think so, I might be a bit scared or shy at first, but after a few drinks I think I would relax' I then asked 'so would it be just you and her, or would I be present?' She said 'you'd have to be there, to give me moral support' 'Then would I be just watching or joining in with you both' She said 'maybe we could fulfil your fantasy as well...' I jokingly said 'well, I might know a few girls.....' She elbowed me and said 'don't tease me'. And we left it at that. A few days later I was chatting with Sam on Facebook, when she asked how things were with me and my wife, I explained things were okay, then remembered that one day when I was with Sam at her house, she had once shown me a video she had made of her and a girlfriend. She said that they had had a bit to drink one night and ended up filming themselves having sex. I remember asking 'would you do it again', and she said 'yes, I'd love to'. So I dropped into the conversation what my wife had said, Sam immediately responded and said 'if you're looking for someone, give me first choice' - Sam had once seen a photo of my wife in a bikini and had joked a couple of times how she would fancy being in bed with her. Amy is 5 years younger than me, has a curvy figure with 38D tits, dark hair and is attractive. She keeps herself in trim by running and working out at the gym a couple of times a week. A day or so later, I came home from work early to find Amy's car on the drive, so didn't normal get home until 6, so I went in doors. I could hear voices upstairs, then I heard a woman moaning, I assumed it was Amy being fucked by some guy. I crept upstairs and peeked through the crack in the door, there was Amy laying naked on the bed, one vibrator in her arse, another in her pussy. She was laying legs spread wide, the voices came from a porno on the TV, although it was on, she had her eyes closed. I stripped naked, my cock already hard, and crept in the room. I gently kissed her pussy mound, she jumped and said 'fuck, you scared me'. I just said 'let me do that' and took over the vibrator. After a while I said 'tell me what you are thinking', Amy said 'You have me tied naked to the bed (Amy loves a bit of soft bondage using a scarf) and blindfolded, and another woman comes in, she naked, and slowly starts to play with my clit, then she gets the vibrator and forces me to cum by using it. Then you take over and start to fuck my pussy with your cock, while she sits on my face and forces me to make her cum with my tongue'. While I was fucking her with the vibrator and dildo, I said 'would you really love that', Amy nodded. I stopped and said 'I'll be right back, I'm getting a rope'. I went down to the garage and grabbed a rope, while I was down there I called Sam and told her to come right round if she could. Sam said 'she'll make and excuse to leave work urgently', luckily she changed jobs 2 years ago and now works just 20 minutes from my house. I’d told her that I’d leave the back door and the side gate unlocked, she was to creep in and strip before quietly coming upstairs. I went back up to Amy, still laying naked on the bed, I said to her ‘we can at least do the tying up bit and have fun’, I the tied both hands with the rope to the bedstead, pulled the rope under the bed and then tied her ankles to each corner of the bed so she was spreadeagled. I said to her ‘I’m going to blindfold you and tease the fuck out of you before fucking you senseless’. I then put on some music so that she couldn’t hear me moving around the room. I started by slowly teasing her pussy and clit with a vibrator, every time she would begin to build to towards and orgasm I’d let her get almost there and then stop so that she didn’t climax, after a couple of time of this she was getting really frustrated. I then started again, but this time moved onto the bed and started to rub my cock around her face, its precum dripping and sticking to her lips and skin. Then I’d gently kiss and suck her nipples, all the time still using the vibrator until she started to build towards a climax. Just over 25 minutes after I called Sam, she crept into the bedroom, her beautiful body completely naked. I left Amy and went over to Sam, we kissed deeply, she rubbed my cock while I slid a sticky finger into her lovely shaved pussy. I then indicated to Sam to gently kiss and fondle Amy’s tits and nipples while I played with the vibrator, Amy was groaning again and kept saying ‘stop teasing me, I’m really fucking horny’. I then motioned to Sam to move down to Amy’s pussy and start licking her, Sam pulled the vibrator out and began to gently lick at her pussy, obviously Sam had found Amy’s clit and started to lick and nibble at it. Amy was squirming and panting heavily, she was building to an orgasm. Sam continued to lick at Amy’s clit, I decided to gently slid into Sam’s pussy, which was already really wet, my hard cock sliding easily into her. I gently built up a rhythm but tried not to push to much at Sam, in case Amy realised what was happening. I could feel that Sam was about to cum, her cunt muscle tightened as they used to, she managed to stifle a moan or cry as she came. Amy orgasmed just as Sam did, both the girl producing loads of cum juices that flowed out of their pussy’s and down their legs. After they came, Sam sat up and smiled widely - she obviously enjoyed that. Amy said ‘fucking hell, that was fantastic, make me cum again’. Sam moved silently off the bed, I then said ‘I’m going to give you something you have never had before. I’m going to straddle your shoulders, so don’t worry.’ Sam then stood on the bed, then slowly lowered herself down, sitting with her pussy just over Amy’s mouth. I then lent over so that Amy thought that I was sitting astride her, then said ‘I want you to open your mouth and extend your tongue when I say, then I don’t want you to react I just want you to lick for all your worth’. Amy nodded. ‘Now’ I said as Sam lowered her pussy down to Amy’s waiting tongue. Amy’s reaction was one of surprise, then she obviously realised what the taste on her tongue was from and started to lick at Sam’s wet pussy. Sam lowered herself more, Amy found Sam’s clit and began to lick at it, Sam was in ecstasy. Sam turned and took hold of my cock, pulling it towards her mouth, slowly sucking and licking at my bell end. Watching Sam riding my wife’s face and Sam sucking at my cock was getting me really close, I pulled away and went round to Amy’s pussy, I slid into her and fucked her for all I was worth. After a few minutes, Sam was beginning to orgasm, Amy had been building while I fucked her pussy and I was just about to shoot my load into Amy. Amy came first, then Sam, then me. We all collapsed on the bed. Sam slide off of Amy’s face then proceeded to french kiss her and lick her own juices from Amy’s mouth and face. When Sam finished, Amy said ‘take the blindfold off, I want to see who she is’. All I said was ‘no, you’ll have to be a good girl and wait’. I sat back in a chair was watched as Sam licked my cum out of Amy’s pussy, making her orgasm again. The sight of watching my naked ex-girlfriend licking the pussy of my naked wife was enough to bring my cock back to life again. A few minutes later, I was sliding into Sam’s sodden pussy from behind her as she continued licking out my wife’s pussy. I came again in Sam really heavily, my cum running from her pussy and dribbling down her thighs. Once both girls had come again, Sam stood up, gave me a big french kiss then walked out of the bedroom, she mimed ‘I’ll call you’. A couple of minutes later I saw her walk down the road and get in her car and drive off. Amy was trying hard to get the blindfold off, so I released her, she keep saying ‘who was she? She was fantastic’, ‘can you bring her back again?’ Amy and I spent the rest of the day fucking each other, she kept saying that she wanted to lick my cum out of ‘the girl’s pussy’. Sam has met Amy several times since, often with me, but a few time on their own. Amy says that she really enjoys their sessions together and wishes she’d tried it sooner. Amy said that if Sam gets pregnant (apparently her and her husband are trying), then I'll get to fulfil my other fantasy. I can only hope. Sam told me that Amy said that she wanted to try a foursome, Sam said she knows someone who would be willing, Amy is considering it, but I think I know what the answer will be.