I had been fucking Mandy for some time. I knew she was married so was conscious to be careful not to get caught. We would mainly drive out into the country to a couple of places I knew were good for courting. There we would fuck one and other silly before I would drop her off near home. This had gone on for almost a year. Then Mandy informed me that her husband was going onto night working and we could have the house to our self. I was pleased to hear that as winter was on the way again. The first night we fucked several times in different positions. I was hoping to stay later but Mandy kicked me out saying I could see her the following night. For almost a year we fucked most week nights and I had fucked her in every room but one. I remember that it was a Friday as I wouldn't see Mandy for the next few days as her husband would be home for the weekend. I had Mandy bent over leaning on the bed and was having a slow leisurely fuck with Mandy from behind. I could just feel my juices beginning to boil when there was a crash that sounded as if it came from the room next door. Without thinking I pulled out of Mandy and ran to the room and yanked the door open. There stood a slim man with his cock out and on the floor was a tray of food that he had just knocked off the dressing table. "Who the hell are you," I snapped at him. In a shaky voice he croaked, "Mandy's husband." Mandy was now behind me saying that she can explain. I suddenly felt silly stood there naked. After I calmed down and the man sat on the spare bed Mandy told me that Harvey her husband had known about us from the second time that we fucked about two years back. He didn't want to watch but loved Mandy telling him all about it. Things now made sense why she would never let me stay for more than a few hours. He also loved hearing Mandy being fucked and told me that he particularly like when I called her a slut, cunt, dirty whore and anything else I could think of. He also enjoyed hearing her having her arse slapped. It was now that Harvey started to talk and he asked me not to stop coming and using his wife. That was enough for me. I slapped Mandy on her arse and told her, "Get your filthy cunt in there you dirty whore and get ready to have your pussy fucked silly." Mandy squealed at the slap and wiggled her arse out the room in the direction of their bed. Harvey smiled at me and just said thanks. I think it was the hardest fucking that I had ever given Mandy. She was crying out things like, " No sir my husband wouldn't like it. Please don't do that." as she played up I play against her as I fucked her silly. I fucked Mandy for the next four years knowing that Harvey was listening to everything we did. He did sit in and watch a couple of times, but he never really enjoy it. Then I got Mandy pregnant. I sat down with Mandy and Harvey and we discussed what they wanted to do about it. I had already told them I would go with whatever they wanted. They eventually agreed that they wanted the baby and that once it was born our arrangement had to end. Harvey said they intended to bring it up as his child and they didn't want me confusing things for them or the child. The last time I fucked Mandy was just two days before she went into hospital and had the baby. I took Mandy a large bunch of flowers and a teddy bear for the baby girl. Harvey shook my hand and said, "Thanks I'll take it from now." I never saw Mandy sexually again. I did watch as Claire grew up and when she was four, I move away to give them a better chance to live a normal life.