Last Friday night there was a knock on our door and when I opened it, there was a pretty blonde haired woman in her late 20s standing there. She introduced herself as Sue and told me that she and her husband, Ralph, from Belfast had moved into our street and were having a welcoming party. She invited me and my wife, Dawn who is 43 to come around for a few drinks. We greatfully accepted Sue's offer and Dawn went upstairs for a shower. Dawn came down wearing a short, low cut black dress and her highest heels and seamed stockings. We walked to Sue's house and were brought in and introduced to Ralph. There were lots of people there, but only a few neighbours who we knew. Ralph and Sue were great hosts, they showed us round the house and handed us both drinks. There was lots to eat and I helped myself, while Dawn was trailed off to dance by Sue's younger brother, Ken, who was 23. I got chatting to some of our neighbours while Dawn danced with Ken. That suited me fine, because I hate dancing, while Dawn just loves to get up and boogie. Dawn came back after a while and rejoined me, but was soon asked to dance again by another young man. Thats the way things went for the next few hours and then when I noticed that Dawn was missing. I waited for a while, but when she didn't show up, I assumed that she'd gone outside for a cigarette. I went out and made my way round to the back of the house where there was a conservatory. On the way, I noticed a car parked in the driveway with two people kissing in the back seat. I smiled to myself and thought of the times that Dawn and I had sneaked off to fuck in cars over the years when we were at parties. A few strangers were smoking in the conservatory, but Dawn wasn't with them. When I asked if anyone had seen her, I was told that Ken and her had been in for a fag, but had left about ten minutes ago. I suddenly realised who it was who was in the car and made my way back to where it was parked. As i approached the car, I could clearly see Dawn kneeling in the back seat, with her head bobbing up and down. The bitch was sucking Ken's cock while she had her skirt pulled up around her waist for him to play with her shaved pussy. She spotted me and tried to rearrange her clothing, but I had allready seen enough. She got out of the car and said that they were only messing about, but when I shouted at her and called her a dirty whore, she started crying and Ken opened the other door and ran off in the direction of the house. I grabbed Dawn and we went home. At first, she denied what I'd seen her doing, but when I checked below her skirt and found her G String missing and her pussy all wet and puffed, she came clean and confessed that she'd been giving him head, but nothing more had happened. Strangely enough, I found that I had become more turned on by what had happened than angry with her and took her straight to the bedroom where I fucked her for all I was worth. When I'd filled the slut with my cum, I made my way back to Sue and Ralphs' The car door in the driveway was still open and Dawn's G String lay on the back seat where Ken had left it when he had removed it from her. The whole scenario had turned me on a lot and I wonder just how far Dawn would have gone if I hadn't disturbed them in the back seat of Ken's car.