Swingers stories and erotic fantasies

My wife had just left for her now usual Friday night out with her best friend Joanne who has recently separated from her husband. Sam had for the last 3 months been going out just to keep Joanne company, usually we all went out as a foursome before the split. Just recently though Sam had been arriving home later then normal but explained that Joanne had met a new guy and wanted Sam around as company before he gave them all a lift home. She had explained that he worked the door of one of the clubs in town so that was the main reason for being late, i just took her word for it and didnt bother asking any questions. This continued for about a month and then i started to ask myself questions as Sam would arrive late and be in a strange mood the next day. One night i decided i would go to town on my own to ease my now consistent worrying about what was happening. I arrived at the club and found a great viewing area on the 3rd floor balcony. I quickly saw Sam and Joanne arrive who stayed on the ground floor near the main bar area. Over the next couple of hours a few lads approached but nothing unusual happened, then one of the door men went chatting to them, he took my Sam by the hand and led her to quiet area still in view of myself and they started to talk with each other like a couple. After a couple of minutes he kissed her on the lips and went off. Later on that evening another two lads approached Sam and Joanne and again there was pecking and groping not just by the lads either, i was now getting anxious and worried, i actually felt humiliated and so decided to leave but i hung around outside the club. After another 15 minutes Sam and Joanne left the club the the two lads and jumped straight into a taxi. I knew where they would go - staight to Joannes, i was not wrong. By the time i arrived they were already there, i snook upto the front bay window and could hear them inside all talking and laughing together. I knew i couldnt hang around the front so snook around the back and luckily was able to see through the consevatory blinds right through into the lounge, it wasnt a perfect view but i could just make out what was happening. After half an hour there was a knock at the door and now the doorman and his friend walked in so there was 4 lads and Sam and Joanne. I noticed Joanne walk out of the room with the new arrival and i also noticed the doorman take Sam by the hand straight into the conservatory. He didnt put the light on but sat down and Sam sat on his lap. I could see his hands exploring her legs and body and she was now rubbing his crotch, seconds later she had the attention of another one of the lads and between the two of them they had my wife naked, stood in front of them. I then saw the doorman take out his cock (very big compared to mine) and place a condom onto it, she then straddled him and started to fuck him, meanwhile his friend was spanking my wife as she rode his friends large cock and then he grabbed her hair and started to pull her head back in very abusive manner, but Sam was loving this attention i could hear her begging for more. I stood outside and watched for an hour as the 2 lads took turns fucking my wife, then a 3rd lad came in to take his turn and at this point i couldnt take any more and so went home. I was very excited by whaat i saw but felt betrayed and humiliated, i had always asked Sam if she had wanted a MMF 3 sum but she always refused point blank and said i wasnt normal wanting her to have another man fuck her, but now i just dont know where it all went wrong.