It's taken me some time to pluck up the courage to write this account of last Summer's holiday - the memories remain vivid and the emotions remain mixed. We'd been married 18 years and been having some ups and downs. Our long term friends S and D have also been having problems but we suspected they'd both been cheating and we wondered about their relationship. Prior to going on holiday we made love one Sunday morning and for the first time we openly talked about expanding our relationship - we talked about involving others, trying swinging etc. the conversation turned us both on - and we masturbated while talking about seeing the other with someone else. Whilst we didn't actually act on our fantasies we did discuss them more and more - and the thought of seeing my wife C with another man (or woman) started to occupy my thoughts. Several weeks passed and we found ourselves on holiday with S & D - not for the first time - in a small hotel in Greece. The days were long - lots of sun and relaxation. C and I were having a good time and we were having a renaissance in the bedroom - sex every night and some afternoons. The happy go lucky atmosphere changed very late one night when the four of us had a late nightcap on our balcony - I guess the drink was talking but S & D started to tell us that that they'd recently to a swinging lifestyle. Despite C and I having a recent dialogue on the very subject S &Ds revelation visibly shocked us and we didn't really know quite what to say for a few minutes. Eventually both C and me got curious and we asked more and more questions; how did they get into it, do they watch each other with other people, how does it make they feel, how's their sex life etc. after having asked too many questions we agreed it was time for bed - I secretly hoped that S & D were going to ask if we'd consider swinging with them - but they didn't ask and so off to bed we went. Once S & D had gone the real OMG conversation started. C was well shocked about the revelation despite us having our suspicions - I guess we speculated but didn't expect it to be true. We went to bed and we fucked like crazy both so turned on. During the night we discussed the prospect and possibility of swinging with S & D - C confessed she'd expected and hoped (like me) that they'd have invited us to swing with them the previous night - we wondered if there was something wrong with us or if S & D were playing hard to get. S & D are an attractive couple - I fancy S who is short with brown short hair with a fabulous body - great tits and an arse to die for. I'm sure C must fancy D - he's a bit on the short side but well built and an attractive rugged guy. For her part C is attractive. Blond, huge E cup breasts, nice figure, striking blue eyes. The next morning was awkward - we were tired we'd been talking and fucking all night - S & D in comparison seemed calm when we saw them by the pool. For the most part we had a perfectly normal day - sitting and relaxing in the sun, until late afternoon when the girls went off for a walk and D and I were left together. I couldn't help myself - I had to ask him 'what was all that last night re the swinging? Why did you tell us? ' . Credit it to him - D was totally open he said they hoped to draw us into the swinging scene - he said that he and S thought we could all have some fabulous times together but he said they weren't sure we'd go for it - so they were testing us out. He then asked if we were up for it? I said I didn't know - we'd discussed it but not made any decisions. He then said S would be talking to C about it as they walked. There were no more developments until C and I were back in our hotel room that late afternoon we both shared our conversations - our hearts were racing - we confessed to be excited - another couple who we liked wanted to fuck us? It was flattering, it was scary, did we want to? Did we have the guts. I think we quickly concluded that we wanted to do it but we both had massive reservations. I think C was more up for it than I was but she'd only go for it if I was sure. Eventually we coped out a bit and agreed we'd see what happened that night but if it happened it happened and we'd be okay with it. We could try it once and see how we felt afterwards. I confess the first twinge of jealously struck when a saw how much extra effort C put into getting ready that night - she was clearly preparing herself for D. That evening was tough - going out socializing, eating etc. with something else in the front of your mind. I did take a good look at S and thought how attractive she was - may be I would like to make love to her, maybe I'd sleep with her later? She had an orange top on and tight white trousers - she looked gorgeous. The night dragged on until we found ourselves in a bar opposite the hotel. The tension was building and building until D broke the ice and said ' are we going to do this or not' - no one needed to ask what the 'it' he was referring to was . C looked directly at me and said 'do you want to?' - I responded by asking her 'do you' - my heart was beating out of my chest. D God bless him - stole the initiative and said lets do it - C you come with me and S you go with him - we'll meet at breakfast 8:00 am. Let's have some fun. With that we walked across the road in the darkness - and C went off with S she seemed embarrassed but she didn't kiss me or say good night she simply went. S grabbed my arm and we walked to our room - I was feeing very nervous but excited. Once in the room I put the lights on and did domestic things like got bottles of water, S on the other hand stripped naked - I could see her in the corner of my eye. She stood naked in front of me - her fabulous tits in full view - white bits fro. Sunbathing and incredible big nipples. Her pussy was quite hairy - which surprised me (C is completely shaved these days). S told me to strip which I did and she knelt before me on the cold tile floor and took my growing cock into her mouth. With her hand and mouth she expertly started to wank me - stroking my length with the protruding head of my cock in her mouth. She gave head like a porn star - and I was so fucking hard. Despite enjoying it I asked her to stop - I didn't want to cum just yet. We climbed onto the bed and into a 69 with her on top. I quickly lapped away at that lovely pussy and arse and she sucked on my cock while fingering my arse hole. I don't know how lone we indulged in this 69 but suddenly I felt an urge to fuck - I told S and she quickly got on all fours on the edge of the bed. I stood behind her and bareback I slid by incredibly hard 6 inches into her - god it felt good, she was so wet - I just slid in and out a few times and looking at her cunt lips holding on to my shaft, I opened her bum cheeks and gazed at her arse hole before increasing my pace and fucking for all I was worth - I slammed in and out of her uncontrollably for a few minutes - using her for my own pleasure until I couldn't take anymore and the feeling built and built until I ejaculated three or four times inside her wet cunt - it felt like I'd cum heavily and emptied by balls into her. S was quickly up and took me in her mouth liking me clean - I put my fingers in her wet hole and started to rub her in a circular motion, starting to touch her clit as I rubbed round and round. She was enjoying it- directing my movements she eventually shuddered and I could see her orgasm. That night was the best night of sex I have ever had. S was a complete slut - she did anything and everything and satisfied me completely. By the morning I was exhausted and my cock and balls ached. What a woman - I was in love with her. By the morning my mind had turned to C - I couldn't wait to see her and talk to her. I'll write a full account of Cs experience with D and our first full foursome in part II of this account later today. I hope you enjoyed this there's lots more to tell.