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Me and my wife been together for more than , we always were very open minded about discussing our sexuality and from the start it was pretty clear that I was not on pair with her on bed, not with my 3 incher dick so we used to play a lot with dildos and lately I got a chastity device to play with. When this story happened it was about more than six months from the last time my little dick was allowed to enter my wife's pussy, since then we had a lot of fun playing and fantasizing about other men fucking her and lately she got more and more comfortable with the idea of making fun of my little dick, the chastity device was a great excuse to introduce her to this, I always wanted it to happen and dream about that type of ropleplay, how good it could really feel to have your wife degrading your manhood in bed while she enjoys riding a dildo 3 times bigger than your cock? fortunately it was all I dreamed and more, she started to enjoy it too and to understand what type of degrading words and phrases got me more exited. I also came to understand her fantasies and how to roleplay about other men fucking her, I got a strapon and used to laid on the bed with the strapon on my belly, my dick in the chastity device while my wife ride that strapon like crazy, squirting all over me multiple times, recalling me why Im in chastity and why I'll never fuck her pussy again. Guess this was as far as we took the roleplay fantasy, until then. 
At this point she never cheated on me, although shes very open minded with me on bed, for hooking with others she always was kinda shy, or a little laking of motivation to make the fantasy become real. But the destiny always finds its ways to manifest whats inevitable. So we were on our summer vacations and we decided to go to one of those beaches where nudism its not mandatory but most of the people goes full nude. I was more exited than her of doing this because the idea of exposing my little dick to the public with my wife being there knowing all that we played about my lack of size, to the point that when we got there and I was about to take my shorts off she says to me "ready to reveal your little dick to the world?" and then I got to keep my shorts on for a while because I started to get all hard. Finally we both took off all our clothes and went for a walk along the beach, we did some swimming and then we got back to dry on the beach. There were not much people but enough to get our eyes distracted, I stared at a couple of hot girls that were doing topless and I made sure to expose my dick on their sight and then I said to my wife "what those hot girls would be thinking? what a hot girl like you is doing with such a small dick loser like me, right?" She laughed hard and kissed me, I almost got another hardon lol 
Then we were just sunbathing when a black guy stopped at like 20yards in front of us and started to accommodate his things to settle there, he was younger than us, late twenties I would say, he was tall and slim with nice worked out muscles on the upper body for all that he was letting us to see, barechest but shorts still on. "wow that guys got a nice hot body" said my wife "I bet you that he got a nice big cock too". "well finally you gonna have something nice to watch" all the naked men that we had seen so far were nothing spectacular to say the least. "But I doubt if hes gonna go full naked" I said while he proceeds to laid down to sunbathe with his shorts on, deception on my wife... 
After half an hour the black guy decided to go swimming, we went to get some hot dogs and we went back to eat them in our place. While we were eating the black guy comes from the water and when he got to his place to dry, surprise! surprise! he proceed to take off his shorts. And then my wife was like "Oh finally! here we go! his taking them off! Lets see if we finally found your little dick some real competition!" He took them off staring towards the sea so the first thing we saw was his sexy round ass, worked out like his legs too, and then he turns around and let us see his nice long hanging cock "Oh yeah, I told you, we got a winner!" Don't know if we made noise or not but he stared at us for a moment, then he proceeded dry his body rubbing his towel all over his body and when he reached his cock my wife couldn't resist and made a movement of excitement, he stared at her for a moment. 
Then he applied few lotion to his body and sat down on his chair to catch the sun, but he turns around his chair which was facing to the sea, to face the beach entrance, not directly to us but close enough. He sat with his legs wide open what makes us easy to stare all what we want at his beautiful dick. My wife was all exited to the point she says to me "wow hes so beautiful, the kind of men that I always dream cheating on you with, just perfect!" and I responded "well, he seems lonely, maybe I could go talk with him about that, see if he is free and willing you would like to meet him" After that I saw a sparkle on my wifes face, for a while she remained silent and staring to the sea, I knew she was thinking about it. "But what if he gets offended?" at that moment it was clear that she was all in.
She didn't refuse the idea, she only was concern about the outcome, afraid about something going wrong but she was willing to fulfill her fantasy right there with that beautiful black guy. "Oh don't be afraid about that, thats the easy part, I'll do the approaching" "But what would you tell him? "I told you, thats much easier than you think, if you keep worrying about those things you'll never be able to realize your fantasy, besides that you just relax I'll make this work out for you" "Ok then, go before I regret" She always was a little to shy to meet new people and this was no the exception. 
I never care to much about rejection and whatnots I get thats how I ended with a fine lady being such a beta in bed. So I steeped up and walk towards the black guy with a smile on my face and tried to talk as friendly as possible to don't confuse him and got straight to the point as fast as possible. 
-.Hi sir, how you doing my name is rick. 
-.Fine, its something wrong? 
I shake his hand. 
-.Oh no sir alls fine, me and my wife were sitting there and we noticed that you stared at us, don't get me wrong Im totally fine with it, so we stared at you too and my wife told me that she really likes you. 
-.Oh really? 
-.Yeah, she told me that you are the kind of guy she always wanted to be friend with, if you get me. 
-.Yeah, I got you.. 
-.So we were wondering if you're free and if you want to she would really like to meet you and be friends with you. 
-.And you're her husband and you're ok with that? 
-.Yeah we have been married for more than now and yes, we are an open minded couple, I really like my wife to meet new friends. So... would you like to meet her? 
-.Sure...She seems a good lady but how we do this? sorry Im not used to this type of stuff 
-.Oh, no worries sir, theres always a first time for everything, I can go with you if you want, or if you find that awkward I'll just stay here watching you two, and you can go to meet her. Don't worry she doesn't bite, shes willing to meet you and shes very outgoing and knows how to handle this. *lies* 
-.Ok then, I'll go, what was your name again? 
-.Im Rick. 
-.Rick, nice to meet you, the world need more good guys like you! 
-.Haha, thanks sir, I just like to take care of my wife, now its your time to take care of her! 
-.It will be a pleasure! 
Then I sat down on his chair and watched him walking towards my wife, I cannot describe the excitement of knowing what was about to happen, all the fun that we could have together and at the same time that crazy excitement it gives you the fear of knowing that theres no going back, once your wife cheated on you with your agreement all can be great and full of joy and fun or it could ruin and end the relationship right there. Theres only one way of knowing it and the risk its well worth it, hell just the excitement of that moment was well worth it!