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By Hardy (cortex243016@aol.com)

A true story which I am finally able to write.
My wife and I were vacationing in beautiful Jamaica with another couple, John and Diane. We enjoyed the warm sun, the water, and sensuous nights. A truly romantic island.
John and Diane had four children, and Karen and I had two children, and after the second I had a vasectomy as I didn't want any more children. My wife was opposed to this as she still wanted one more child, and she was angry when I told her. Anyway, I told John that it was about time he had a vasectomy, which he did not appreciate as he and his wife were catholic.
On our third night on the island, we had a lovely outdoor dinner, and we all had several drinks. At this point John asked me if I would want to change wives that evening. Then he said as I hesitated-"you like Diane don't you". I said yes, that she was a neat gal and very attractive women. Then I said "is that OK with you Diane."
She said that since it was OK with John it was alright with her. At that point I said that John had to ask Karen, and John did ask my wife. My wife looked at me, and I nodded yes to her. She was flushed and a little bit angry that I would give her to another man. She said alright if that was what I wanted, but she wanted another drink first. Then while John got her another drink, we left ,and I said that we would be in my room.
Diane and I did not waste and time, and I soon began stripping her. She looked so lovely in her sheer white nylon underwear, and her bra and panties were then removed as I was kissing her. We were both excited neither of us had done this before and I was very hard as I pressed her lovely body down on the bed. I spread her legs and touched her cunt, which was very wet. I quickly entered her and thrust fully into her. Her legs were lifted and soon clamped over my legs. Neither of us lasted long.
I came first and she came very soon after me. I said the sheer naughtiness of what we were doing was wildly exciting, and I said the thought of my wife Karen being fucked by John made me so excited I couldn't hold back and spurted in her so quickly. After a while I called John and they were ready to call it a night. Diane said that she would like to do this again the next night, and I said that I would like to be with her again.
The last thing that I had said to John and my wile was "you two be careful, and you know what I mean" I certainly did not want her to become pregnant. When Karen joined me she looked very sheepish, and somewhat disheveled. She said "I liked it and John wants to get together again tomorrow night" We did not talk about what happened, except I said Karen also wants to have a repeat.
After dinner and drinks the next night we had a repeat performance. This time Diane and I fucked longer then the night before, and after we finished and rested, she sucked me off and she was very good at it and I came again. I went down on her and she came again also. Anyway both John and Karen wanted to get together the next night, and my wife and I agreed.
This was the last time we got together as the next day we had to pack to leave. It was a repeat performance, and I was still wildly excited thinking about John fucking my wife. He wasn't a large man but my wife said he had a very large and thick cock, and clearly she liked being fucked by John. The next day John smiled at me and looked triumphant. He said that he stretched my wife out pretty good.
Well, then my wife's story unfolded and she told me what had happened. When they got to John's room my wife said that they would have to be careful as she had just figured out that day and the next two were when she was ovulating and was fertile.
Then she said it would serve me right if she got pregnant as she wanted another baby and she was angry that I had a vasectomy without telling her. Then she thought about it and said to John that he shouldn't come in her. She told me then they stripped and she got very wet looking at his thick cock. She was reluctant at first but John finally spread her legs and pushed into her, stretching her till she was groaning.
Soon she said he was thrusting powerfully into her and she was responding and clutching him. As he was thrusting faster she felt her orgasm approaching, and clutching him with her arms and legs said over and over again "don't stop" She said she was jerking and moaning as she came and at that moment she felt John spurting into her. After finishing they just laid there until we changed back.
Well, the same thing happened the next night and she was powerless to stop him from coming into her as she was overcome with her own orgasm, spacing around his thrusting cock as John was pumping his sperm into her.
The next and last night she just didn't care and she just let John thrust into her till he came. She was very excited by the possibility that she could get pregnant which just heightened her arousal and she surrendered and lifted her legs and spread them widely.
After a little while they were using their mouths on each other and then John put her on her hands and knees at the edge of the bed and he stood behind her and pushed into her soaked cunt, then grabbed her hips and fucked her for a long time till finally he groaned and spurted into her. When Karen felt that she came again.
I couldn't believe she had risked pregnancy, but she said she was helpless, being pounded and stretched by his big cocked. Also she said it would serve me right if she was pregnant, since I had readily agreed to wife sharing. Even though she me that she was likely pregnant I was very excited when she told me how thoroughly he had fucked her ,and she said that risking pregnancy made her very excited. She said that she thought John wanted to make her pregnant, and maybe wanted revenge because of my urging him to have a vasectomy.
Later I told Diane that her husband probably made my wife pregnant. She said yes-she and John wanted to trade so that John could impregnate her so we were set up. I told John that he had probably knocked her up and he just smiled. I had wild sex with my wife the last night, while thinking about John fucking her and filling her cunt with his sperm. I pictured her on her back with her legs lifted and spread with John mounting her and stretching out her cunt with his huge cock, and punishing her, thrusting powerfully into her, and filling her with his sperm.
Well, it happened! My wife did get pregnant, and refused to get an abortion, saying it was all my fault and it served me right. Later, I met John and Diane, and they just smiled, and John was gloating. As I watched my wife getting bigger, I was sorry that I agreed to the whole thing. However, I never thought that I would be so aroused by the thought of my wife being thoroughly and repeatedly fucked by another man.