This is about something that happened on a recent holiday to Mexico, and I still can't believe it did! Me and my wife Karen are both mid fifties, I'm a fairly regular guy who keeps in shape, she belies her age, very attractive with blond hair and an amazing body with a nice pair of tits. The kids have all grown up and left, and sex is fairly regular, and always enjoyable. We often use sex toys and pretend that there's another guy involved and when we occasionally watch porn the mfm scene's always get Karen wet. We went on an all inclusive holiday to a really nice hotel, there was nightly entertainment which was really good. One night after dinner we got a table near the bar area and settled down to watch the show, it was warm and the drinks were going down really well, the show finished and the area thinned out and I went to the bar, when I came back there was a guy sat talking to Karen, 'hi' I said sitting down and putting the drinks on the table, Karen said 'Oh, this is Bernard, he's just arrived today and we were talking about the show and the Hotel', 'ah ok, would you like a drink?' I asked, Bernard said he'd have a Whiskey with lemonade, so I went and got one and when I returned I sat down and we chatted, Bernard was Canadian, around our age and told us how he had recently got divorced after his wife went off with another guy, blaming it on him working too much, and that the holiday was a treat to get over things. The drinks kept coming and Bernard told us about his room, it was no ordinary room, it was a suite with a hot tub! 'Wow, I'd like to see that' said Karen, 'Ok, you're invited, let's go' said Bernard, and we headed off drinks in hand. When we arrived we entered, it was swish, and there on a private balcony was the hot tub, Bernard switched it on and it frothed, Karen put her hand in, 'Oh I wish I had my cosi' she said, 'You don't need that, let's get in, in our undies!' I said, Bernard laughed, ' fine by me, let's get more drinks from the optics' I went with him, we looked back, there was Karen in the hot tub in her undies with her dress and shoes on a chair nearby, she was laughing, 'you have a beautiful wife, you are very lucky' he said, 'yes' I replied. We took the drinks and stripped to our pants and climbed in, we sat chatting and laughing, there was a real chemistry I could tell Karen liked him, he was her type really, fit looking and quite tall, it was now that I sensed something building... After a while we climbed out, Bernard got towels from his bathroom and we all dried off, Karen said 'I can't wear these undies under my dress they are soaked', 'well let me help you out of them' I said, I moved behind her and undid her bra, exposing her tits to Bernard who was still dabbing himself with a towel, Karen didn't flinch as he stared, and I then rolled her damp skimpy pants down, they dropped to her ankles revealing her white bikini mark and thin strip of pubic hair, I looked at Bernard and could see the front of his shorts bulging, Karen said 'are you hiding something in there?' he looked to me as if for reassurance, 'I think we both are' I said pointing at my own erection in my undies, I stretched them over it and Bernard did the same, 'Mmmmm, what's going to happen now?' Karen said, I walked her backward toward the bed and layed her back, I got on the bed and started kissing her breasts, almost immediately Bernard had joined me, Karen moaning her appreciation, she felt for our cocks pulling them to her mouth, Bernard was quite a bit bigger than me, a very thick veiny cock with a bulbous mushroom head, impressive actually, Karen sucked cock to cock and balls to balls, I rubbed her between the legs she was wet, so I went down and licked her, looking up at her sucking Bernards cock, as he rolled his head back, I came back up and pushed my cock into her mouth replacing his, 'fuck her' I said, there was no reaction or protestations from Karen as she just laid there with her legs spread wide and her sex glistening, I watched intently as he positioned himself between her thighs, parting her lips with his swollen bell end and pushing it up my wife, she moaned and sucked me more intensely as he began to fuck her and within moments orgasmed loudly, this triggered Bernard as he began to grunt and thrust short sharp thrusts, 'cum in her' I said as he released his sperm, Karen wincing as he pinned her legs back pumping his load into her, he flopped onto her, they both laid motionless, Karen not sucking but just gripping my hard cock, 'ok, my turn' I said, moving down the bed as Bernard pulled out leaving a creamy stream leaking out of her, I got between her thighs and pushed my cock into her cum filled vagina, adding my own load instantaneously. We cleaned up and left, we got back to our room and were that tired we fell straight to sleep, the following morning we talked about the nights events and neither of us could believe it really. I asked Karen if she enjoyed it and she said she did, but wished she hadn't been so drunk! We were there for two more nights and both nights we ended up with Bernard back at our room and his sizeable cock up Karen's vagina. It was an unexpected end to our unforgettable holiday.