The first time I mentioned to Tina that the mere thought of seeing her having sex with another man intoxicated me beyond orgasm, she didn’t have the slightest inkling at the time what she would willingly and eagerly be giving up. In fact, she was very upset at me for even bringing it up at all. Tina is a gorgeous five foot four redhead with large D-cup breasts and that perfect balance of softness and firmness and a nearly perfect hourglass figure. It’s not like I just woke up one morning wanting to share her with another man. I had feelings of jealousy and that sick, horrified feeling if she ever betrayed me. The first time I was turned on by the thought of her with another man was the same day I introduced her to the nude beach. And like most females confronted with the idea of being exposed to a smorgasbord of other naked bodies, she said she might only go topless, which was fine by me. A thought that hadn’t occurred to me until we were both naked (Tina topless) on the beach was that Tina would undoubtedly pay attention to the variety of cocks and might be aroused by some of them. The thought that she might see one that turned her on more than mine gave me a twinge of jealousy, and another as yet unidentified feeling I was not ready to acknowledge. I quickly dismissed it because I knew how she felt about me and had confidence in her love and loyalty. Remember how I was worried that she might see a cock that turned her on more than mine? Well, wouldn’t you know it, just as we finished laying out our beach blanket and setting up our umbrella, when a young attractive man walks by, waving a friendly greeting at us. I saw what he had between his legs and had to do a double take. I hoped she wasn’t going to wave back, which she did. A part of me didn’t want her to look at his cock. But he was already on his way over and it was inevitable. I was more nervous about it than I wanted to be and hoped neither of them would notice. I hazarded another glance at his cock as he entered the circle of shadow cast by our extra large umbrella. He did not try to sit but just stood there thanking us for sharing our shade. His cock was easily as large, soft, as mine was hard and maybe a little longer. Tina, who had remained seated, was actually close to eye level with it. As I watched her, I noted that for the most part she tried to avoid looking at it. But when her eyes did center on it, her eyes went a little wider and her jaw slackened noticeably. And even though she quickly regained her composure, when she spoke, trading small talk with the stranger, I could tell she had become nervous. The small talk continued for a few more minutes until he excused himself and continued down the beach. I don’t know why I felt this way, but I wanted him to leave, worried that he might start getting an erection while she watched. Talk about an uncomfortable moment. A number of hours later I needed very badly to visit the porta potty, which meant putting on my jeans and taking a walk, and hoping the closest one was unoccupied. I left Tina alone, taking the emergency bog roll with me. While I sat there relieving myself in that urine and plastic scented hotbox, I wondered how Tina would react if that mysterious stranger came back and hit on her while I was away. And I wondered at that moment just how intrigued she was by seeing his cock so closely. I took it a little further and asked myself, what if this guy turned her on so much, and after seeing that he was getting an erection, decided to have sex with him? This of course caused an even stronger twinge of jealousy than before. And of course I was being ridiculous because I knew her to be a woman who treasured honesty. But while I sat there thinking about it, something interesting happened. The more I thought about it, the more I realized I was getting turned on by it. I imagined coming back, catching them in the act and found that in addition to feeling hurt by her betrayal, that I was also intoxicated by the idea of her having sex with another man. This part surprised me because I did not think it was possible before that moment. I walked most of the way back with an obvious erection. By the time I reached our blanket (she was still alone), it had subsided and I could take off my jeans again. My epiphany was, after removing the potential for betrayal from the equation, I found myself intensely turned on by the thought and it completely overwhelmed any sense of jealousy I had. I thought perhaps there was another side to jealousy that nobody ever talks about, and that we have only been looking at the negative side of it all this time. From that day forward, Jealousy no longer mattered. I just wanted to explore this new feeling more fully and find a way to share it with Tina so she could explore it with me. It was after our trip to the nude beach, that I told about my fantasy to see her with another man, for the first time. She was upset because she was surprised that I would even think of her with any other man and she went through the usual set of feelings. After she realized it wasn’t just an excuse for me to later have other women, or that it wasn’t that I didn’t really love her, or any of the other reasons women have about being shared like this, it still took her a long time before she was ready to experience it. She finally confided in me one day that she had given it a lot of thought and since I was giving her permission to play, that she wanted to have additional sexual adventures. It wasn’t long after that, that would experience a sexual journey she would never forget. The charmer’s name was Kevin and they hit it off from the first moment they started chatting. We met him at a medieval campout event with a group called the SCA. His tent was pitched right next to ours, so we couldn’t help but be friendly neighbors. As the sun went down on the second day, after we had learned that Kevin just came out of a relationship and was there to get away from things, he and I took a walk to gather firewood. I was bluntly open with him about Tina and I having an open relationship, adding that she was attracted to him. He did not react in surprise and instead admitted his attraction to her. For a moment, I was overtaken by the sense of intoxication I felt, because I somehow knew that she was going to let Kevin make love to her. We invited him to come stay overnight at our house the very next weekend and he accepted. We had sex more than usual that week and it wasn’t hard to get her to fantasize about her new lover to be. They also talked on the phone, A LOT, which only fueled her desire to do this. This was also a test for me to see if I could really deal with her having sex with another man right in front of me. I was both nervous and excited. As with all things, it was a lot like my fantasy and not like my fantasy, at the same time. We were both very excited and just as eager for this to happen. She admitted later that as the hour drew closer that she became more excited than she thought she’d be. In fact, afterwards she mentioned that it was more exciting than our first time. What this meant to me was that she was beginning to experience the same feelings that I had about it. Kevin came over and pretty much sat on our couch. We drank some wine to relax. Things actually got started as soon as Tina sat down next to him. He turned to her and started kissing her on the mouth. They warmed up slowly, but before long their hands were freely roaming all the naughty places. At their first kiss, I was so intoxicated that it all turned surreal. When her hand massaged his cock through his jeans, I was in a state of euphoria!