Ralph and I had been mates for what seemed like forever. We had first met when we went to secondary school. Throughout school we did everything together. We dated girls together and even slept with them together. We must have had at least six threesomes and lost count of how many foursomes that we had. Then Mandy came into our lives. We were both besotted by her. I managed to get the first date with her and then Ralph took her out. I was almost two months before I finally managed to have sex with her. It was her first time and I was gentle with her. Then a few days later Ralph told me he had taken her virginity the previous night. I knew he couldn't have as I had taken her virginity. Anyway we both kept seeing her and having sex with her. Then the night before she went off to university we had a threesome with her. It was a fantastic night. Then she was gone. Ralph and I were sad to see her going away. We were both starting college and mine was attached to an apprenticeship. We were still playing the field and had both invested in a six bedroom house that we intended to do up and sell. We had some great parties there and plenty of pussy. Some on our own and some we shared. The house was just about done when I bumped into Mandy. She had just finished her degree and had just moved back home. I started dating her again. She had several boyfriends whilst at university and was now more experienced and knew what she wanted and liked. I thought that we were in a monogamous relationship, but soon found out that she was also seeing Ralph. I was angry and I ended up fighting with Ralph. We knocked seven bales out of each other and there was no clear winner. Mandy was cross with the pair of us, but also pleased that we were both prepared to fight for her. She told us both that she would see each of us as and wen she felt like it. So on we went sharing Mandy, both in and out of bed. Eventually the inevitable happened and we ended up in a threesome with her. Then we were all three living in the house. Mandy had her own bedroom and would sleep with one of us when she wanted to. Then one night she brought home a man we didn't know and both Ralph and I went ape and beat the shit out of him. Neither of us were happy to share her with someone else. Mandy now realized that we were in a bubble of three and we went back to just the three of us. A year later I decided that I wanted more and asked Mandy to marry me. She agreed and the atmosphere with Ralph was strained. He came around when Mandy continued to sleep with him. The wedding was great and Ralph fucked Mandy on the wedding morning. Then after the honeymoon we had a threesome with Ralph, and although Mandy now slept in my room, she would still sleep with Ralph on odd nights. It was clear that it was not enough for Ralph and he started to screw around again, bringing ladies home and Mandy and I caught him several times fucking other women in the lounge. It was at the time that AIDS was beginning to sweep through promiscuous people. Mandy and I had to talk to Ralph and tell him that we could not allow him to continue to sleep with Mandy if he was still putting it around. A few months later he brought Sasha home. She was gorgeous and Ralph was soon in a monogamous relationship with her. We were very pleased for him. Within six months he was married to her. Then things all changed again when after a party at our house Ralph ended up in bed with Mandy and I was left with Sasha. Well she was gorgeous and I ended up sleeping with her. She was the first woman I had slept with since Mandy had moved into the house. After that we would often swap partners for the night. Then the inevitable happened, we had a foursome where Ralph and I screwed both Mandy and Sasha in the same bed. It was a few months later when Mandy announced to us all that she was pregnant and she didn't know which of us was the daddy. Again just one month later Sasha announced that she to was pregnant. We all agreed that as far as we were concerned that the babies were the those of the husbands. That didn't stop us from swapping partners. Mandy had a boy and Sasha had a girl. We were all over the moon. In a little over a year Sasha announced that she was pregnant again. Yet again she wasn't sure which of us was the daddy. Three months later Mandy was pregnant. Four years later Mandy and I then had three children and Sasha and Ralph had two. We all lived in the same house and still swap partners, but on a less regular basis. Then the children were grown and started to leave home. They were all over sixteen and we decided that it was time to tell them that they may not have the dad that they thought they had. They all took it well with the exception of Mark who wanted a DNA test done. Ralph and I forked out for tests for all of them. We had a family meeting with all of them when the results were back. I was the father of two of Sasha's children and Ralph for Sasha's first child. Ralph and I were fathers of one of each of Mandy's. Mark was pleased that he was mine. The others all seemed not worried either way. It seemed to bring all the kids closer together as they were all brothers and sisters or half brothers and half sisters of all the children. Most of them seemed to either have known or guessed that there was more to our family arrangements. After that with just three left at home were were able to be open when we slept with the others wife. That was eight years ago and all have now left home and they all come back and stay from time to time and treat all four of us as their parents. We still sleep with both wives and I think we have all been very lucky to have had such a wonderful life and life style. Plus we have wonderful children.