This happened about 8 years ago when we were in our late 20s, we were friends with an old school friend of mine and his newish wife (3 years married to our 8) and decided we'd all go on holiday together to Crete. To cut to the action we were having a great holiday and my friends wife, Karen started to go topless on the beach, there was no way I could ignore her stunning nipples, they were enormous, she had big nipples, far bigger than my wife's, the nipples were even a little pert, but I'm sure that is because she'd been swimming in the sea rather than being turned on, that said my wife Trish wasn't small in the tit department either and I'd never had any reason to complain so far with her, she's always said more than a handful is a waste!. My wife noticed I was paying just a little too much attention to them and said ‘tut tut Pete, stop looking at Karen's tits’ so I went for a swim as I was starting to get a semi hard on, Karen had walked down to the sea and so we were talking to each other with our bodies below the waterline to stop the sun burning us, Karen said to me jokingly ‘it's a good job I'm not standing up, I don't want my nipples getting sunburnt - Brian would have to suck them to make them better again’ and then laughed, we started knocking water at each other and I came close to her and I'm sure that I touched her tit purely by accident, but it played on my mind! That evening we had planned to go to a good open air restaurant serving Greek food and so both of the women wore long(ish) dresses with a little bit of cleavage showing, they both looked stunning and my wife put on her best lingerie and stockings (which during the day because of the heat would not have been possible) she knows how much I like lingerie and I have nothing to complain about in the sex department from her, she's always up for a shag, sometimes too much when I have got home from work and just want a rest! So we went out to have our meal, as the wine flowed the conversation got round to my wife taking the micky about me looking at Karen's tits on the beach - she said 'Pete didn't realise I knew he was getting a stiffy looking at Karen's tits, they were pretty impressive though and her nipples - wow', I tried to change the subject but my wife kept going on about Karens tits, she said ‘Well Pete come on we're all adults would you like to have had a feel of them’? I really thought that Brian, my friend would be unhappy about this, but he said ‘Well Pete did you want to have a feel of them?’ Jokingly I said ‘Well what normal man wouldn't they are pretty impressive, you’re a lucky bloke Brian’ anyway I thought that was the end of the subject and we carried on speaking about other things and where we would go the following day. As we got back to the hotel Brian said come to our room, I've brought a bottle of Bacardi in the supermarket earlier today, you go and get some cokes and ice from the hotel bar and bring them up to our room for a nightcap’. At that stage there really was nothing on my mind other than having a quick drink and then going to our room, where I was looking forward to my wife being in her lingerie and having a good fuck ..... but things changed a bit when Brian came back after pouring the drinks out and after about 20 minutes Karen said ‘Pete well at least you were honest about my tits, so if you had a feel of them do you think Trish would object?’ I looked at Trish and she said ‘Go on then otherwise you'll only be thinking about them all of the holiday’ Karen called me over and undid the halterneck of her dress and she had a wonderful black lacy bra on which only went round her back and had no bra straps so it didn't show when she had the dress on, she stood up and lowered it and her tits were right in front of me, the nipples looking wonderful so I touched them very gently, Karen said ‘Come on Pete have a proper feel of them, in fact have a suck of my nipples’ I glanced at Trish and she said ‘it's ok’ so I went at them like there was no tomorrow, almost immediately I had a complete hard on and was sucking on them for what seemed like ages. Eventually Brian said ‘Is this a one way thing then, so don't I get to see Trish's tits?’ without any hesitation Trish had her ample tits out and Brian didn't wait to be asked and joined Trish on the sofa and started sucking on them and to my surprise had his hand up Trish's dress and clearly had his fingers in her cunt, what happened next was incredibly sexy but also really shocked me, Brian lifted her a bit and pulled her knickers down exposing Trish's hairy but tidy cunt which he knelt down and started licking, Trish didn't even try to stop him and pushed her cunt towards his tongue! This is when my wife said something that stunned the life out of me ‘Guys it's clear that you both are enjoying yourself a lot, us girls as well - just for tonight why don't we swop, but there must be no recriminations in the morning’ I was stunned she'd never shown any signs of things like this in our marriage so far, I looked at the others and they said ‘why not’, so Trish said ‘good night’ and took Brian by the hand off to our room and I was left alone with Karen - I then seemed to be at a bit of a loss and asked her ‘Are really sure you are ok with this?’ - she said ‘As long as it's a one off it will be fun, it'll be like when you were younger and pulled someone for the night!’ I went over to her and she still had her tits out but I ignored those and gave her a proper deep kiss that lasted for ages, her tongue was wrapped around mine and too be honest, I could of come right there and then! I could feel that my cock had a lot of pre-cum seeping from it, so I said I need to take off my good trousers or they'll be ruined - so Karen led me to the bedroom! I went and took off my trousers, it was clear that I had a rock hard cock in my pants, so Karen said ‘We need to get rid of that or you'll be no good to me the rest of the night - come over here and sit in the bed’ she came over and knelt on the floor, put a cushion under her knees and pulled my pants down to my knees and said ‘Ehm, this is going to be such fun, just enjoy it and we'll have a great time tonight’ Karen then began to give my cock a really lovely wank and tit-wank and kept going closer and closer with her mouth without actually putting it in! I said ‘Karen I'm on the verge of coming, please give it a suck’ she laughed and put her lips right over it and took it in her mouth and proceeded to give me a wonderful blow-job, I lifted her head and said ‘I'm not going to last long if you keep doing that’ Karen replied ‘That’s the idea, I want you to come so the next time you get a stiffy on it will last for ages’ - I didn't need telling twice and put her head back on my cock and proceeded to fuck her mouth, I came like I'd just opened a champagne bottle and exploded in her mouth, there was so much come, much more than normal and it was everywhere - on her face, hair and tits! Karen said ‘Do you normally come that much, there’s loads of it everywhere’ she said laughing’ I apologised and she said ‘I'm going to the bathroom to clean myself up’ - she was gone for ages and I was wondering if she'd had second thoughts about the night but she shouted out that she was having a shower to make it all fresh down there’ my heart missed a beat, this was like a dream, Karen then called out ‘Pete do you like lingerie?’ ...... is the pope Catholic? So I called out ‘yes, why’ - she replied ‘well I'm going to give you a little treat’ and at that stage she came out of the bathroom in a white bathrobe, she said - ‘Pete please go to the bathroom and clean yourself up - I want to surprise you?’ So I disappeared to the bathroom and had a quick shower and cleaned myself for what seemed ages, wondering what she was up to - eventually Karen called me out and was in bed with the sheet pulled over her, she said ‘Pour us another Bacardi and Coke and let's take our time on this now as you’ve had all the fun and now it’s my turn’, so I poured the drinks out and brought them over to the bed, Karen reached up and pulled me closer and kissed me and passed the drink she had in her mouth to mine, at first I was bit unsure as I thought she might still have some come in her mouth, but she said don't be silly ‘I've had a good clean up’, but it did taste good’ now my wife clearly doesn't like the taste of come, but often gives me a blow-job, so I wasn't sure how much Karen was telling the truth? We kissed and kissed and kissed for ages - I really wanted to enjoy the whole thing! Eventually I said can I get in the bed beside you and Karen threw back the sheets to reveal the most beautiful set of black lingerie going, black lacy bra, waspie, a small g-string that had an opening so you could see her cunt, seamed black stockings with really lacy tops - I really thought I'd died and gone to heaven. Karen said 'does it meet your approval? - enjoy it Pete, this is Brian’s most favourite set and he says it gives him an extra hard on, I hope it will do the same for you?’ ‘Karen I want to spend hours in there you look so beautiful and stunning, Brian certainly is a lucky bloke’! So I gradually worked my way down her body with my tongue spending ages on both tits and those glorious large nipples and got to the g-string, I pulled it to one side and was quite shocked to see her cunt completely shaved, (my wife hadn’t done that yet but she would do after this night though), I couldn't get my tongue in there quick enough and Karen moved a bit and opened her legs a bit wider so I could lap at her soaking cunt. I was like a dog on heat, every little bit of her cunt I spent ages on, licking the inside of her leg and then just touching the clit with the end of my tongue - Karen was loving this, so I pulled her down a bit more so I could get both hands on her arse and lift her tighter towards my tongue on her clit - we were now both like dogs on heat and I stood back a bit and just gave my cock a good wank just looking at her laying there with all the most wonderful black lingerie in the world on with her dripping shaved cunt gaping open for me, Karen reached down and pulled her cunt lips open and said ‘I bet you can't wait to fill this up?’....it never crossed my mind to wonder what my wife and Karen’s husband were doing in our bedroom! I got hold of Karen and thought in for a penny etc, and turned her over and then pulled her g-string down to her knees, she lifted her legs a bit so I could take them off completely and I buried my head in her cunt again from behind, she was wet - running like Niagara Falls! So then I took a chance and started to lick her arse, Karen said ‘Oh I’ve never had that done before, Brian has done pretty much everything in the sex department, but never licked my arse’ so I licked her the full length from her cunt until the small of her back. She asked me if I wanted her to come, I said ‘As long as you leave the lingerie on so I can fuck you in it’ - Karen replied ‘I will and you can, but can I have a bit of a break my pussy will be puffy with too much use’. So I went back down on her and was wanking at the same time, I knew she was getting close (as was I again), her breathing was getting deeper and she was pushing back on my tongue, eventually she exploded and called out so loud I was worried she'd let the next room know what we were doing! She collapsed on the bed while I was still wanking, Karen said ‘Can I watch you come - actually shoot the spunk out of your cock, so I put it towards her face and in no time I pumped it all over her face and lips, she rolled her tongue and licked a bit of the come into her mouth - it was like being in a porn movie, I'd now come twice when once was the norm. Karen then cuddled me and we just kissed a while, I was sure some of the come had gone on my tongue but I thought what the hell. After another drink and about half an hour - she turned to me and said ‘Well Pete, it's time you gave me a good fucking, I think you must have got rid of most of your come so there won't be a lot left to empty in me!’ ...... So we started kissing again and she pushed me back on the bed and bent over my cock, she now took off her bra completely, so all she had on was her waspie and seamed stockings, she started to wank my cock and then took it in her mouth again, she was insatiable - but I was sure that I really wanted to fuck her now, so I pulled her towards me and I could feel her bald cunt rubbing on my rock hard cock, she was so wet that I just moved a bit and my cock went straight up her cunt easily. I said to her 'Please just stop a bit I just want to remember my cock in your pussy as I'm sure I'll remember this for the rest of my life’ Karen said ‘Don’t be stupid, we're going to fuck all night long until my pussy is red raw!’ So now she sat on top of me and rocked back and forth and even though I'd come twice I asked her to slow down a bit as I didn't want to come again just yet. Karen then said ‘Is there anything you'd like to do to me that you're too frightened to ask about?’ - As she'd asked, I said that in some porn videos I'd seen some girls were taking it up the arse but had never tried it with Trish and that was something I'd like to do?’ she said ‘ok, but we'll need something to lube my arse as it's not easy to do straight off’ I then asked her if she'd done it before and she said that Brian liked doing it to her at least once a month and she'd wear a white corset when she did it so that he felt like he was taking a virgin, I thought my cock was going to explode the way she was talking! We searched around and found some cream in the her toilet bag and she said ‘ok Pete, over to you and bent over the bed on all fours with just her waspie and stockings on - I couldn't resist that view and just had to lick her from behind, but she said ‘Come on finger me and rub in the cream in my arse’ this was beyond my widest dreams so I gently rubbed the cream in her arse and then pushed one finger in her arse, then another all with cream on. Karen said ‘It's ok now but take it a bit gentle at first until it's gone right in and out a few times’ I just didn't know how I didn't come again just from what she was telling me! So I lined up my cock at her arse and gently fed it in a bit at a time and then I had it right in up to my balls, Karen leaned over her shoulder and said ‘Is that what you'd imagined it would be like?’ I told her it was beyond my imagination, she then started to rock backwards and forwards with my cock up her arse, I leaned forward and cupped her tits and the nipples were rock hard and sticking out so I knew she was enjoying it as much as me. I asked her to turn over on her back and she let me feed it in her arse from the front which allowed me to play with her clit at the same time, we were both sweating like pigs and I was at that stage where I wanted to come again but I knew once I did I'd wish I hadn't. Eventually Karen said 'Come up my arse then and we can have a rest’, so I turned her over on all fours again and it went in easy, I then pounded her for another 5 minutes and was playing with her clit at the same time, she shouted that she was going to come again and I needed to empty myself in her, I didn't need telling twice and exploded up her arse and it felt wonderful. She stayed on all fours and asked me to go and get some toilet paper as she didn't want the cum dripping all over the sheets and when I came back she was still in the same position with the spunk running out of her arse and down her leg! After she'd cleaned herself up again she said ‘I think we both need a shower, so off she went and I waited until I could get in there. When I returned I thought I'd gone to heaven, Karen had put on her white corset and white stockings, no knickers and had a 'cock like' vibrator that had mock veins etc just positioned about half way in her cunt, she said ‘I promise I'm not using this, just getting my cunt ready for you - although you might like to watch me play with myself? - my cunt is a bit sore so just have a little lick of it while I leave the vibrator in place until we are ready to go again’ - Now I'm no Casanova and it was beginning to worry me that I'd be able to get another stiffy again, I thought does my friend really have this much sex with her all the time? Karen was really a whore in the bedroom and I thought how lucky my mate was if he got this even once a month. Anyway the sight of her ‘virginal’ in her Corset was too inviting, and so I went down on her slowly while she gently inserted the vibrator in her own cunt as I thought the longer I did that the more time I had to try and get a stiffy on again! So I asked her, Karen as you've given me sex that I'll never forget is there anything you want’ she looked quizzical and thoughtful and said ‘I think we’ve pretty much ticked the boxes, but I'd love you to come up my cunt’ - now I was pretty sure I'd have no spunk left, but I said ‘ok’ and just slid into her and kissed her intently and fucked the life out of her, which impressed her as much as myself, I even lifted her arse and kept a finger up there as I fucked her, Now it's strange but because I'd done so much my cock was not so sensitive so now i could just keep going, she must of thought I was a was a real stud, but I was firing way above my league. After about 20 minutes (yes I found it hard to believe as well) she said ‘My cunt is getting a bit sore, can we go for it, she said really bite my nipples but please, please try and not mark them, so I did my best and I could tell from her breathing she was getting close 'She screamed out spunk in me you fucker and went back and forth by the dozen’ there's no doubt Brian was a lucky man if Karen could perform like this. I came in her right up her cunt as requested and fortunately there was still some toilet tissue on the bedside cabinet which she placed inside a pair of new knickers and put them on to stop the spunk oozing out....we were both so fucked in more ways that one so we just fell asleep together. Cut to the mornng, when I awoke Karen had already showered and had put her dress on and was drying her hair in front of the mirror. She said to me ‘Well you were a right stud last night weren't you’, I was feeling sheepish and didn't know what to say but she said ‘look it's ok, you enjoyed it, I enjoyed it, no doubt your wife and my husband enjoyed it - just remember it as a one off, well not quite, I thought I'd give you just one more thing to remember!’ with that she walked over to the bed and flung back the sheets, which I tried to stop her doing, but she tugged again and threw them in the corner. Come on Pete, this is your last chance and she knelt on all fours on the bed and said ‘Do it now, one quick fuck up my cunt and spunk up me as quick as you can’ instantly I was rock hard again and was up her as quick as I could and fucked her as fast as I could, I exploded in a few minutes, I pulled out of her and the spunk was running running down her leg‘ she cleaned herself up yet again and we both walked down to breakfast and to meet our partners, who had a grin all over their faces. It never happened again, we enjoyed the rest of our holiday and we remained friends until they moved to Canada about 5 years ago, we still keep in touch by Skype and are planning to visit them. My wife told me what they did and that Brian had shagged her 4 times during the night and she wanted to shag me asap and if I'm honest it did improve our sex life as I told her things that I would like to do, like her having a shaved cunt etc and taking her up the arse, which by the way she did on the night with Brian, I think we secretly hope it might happen again when we go to Canada........we shall see!