This happened about 10 years ago. My then girlfriend had got a job in a pub and one night I went up to meet her. After closing we were driving home when we ended up in a country car park which now I know now is a well known dogging place but at the time neither of us had even heard of dogging let alone done it. Once we were there it wasnt long before we were having sex, then I took her outside and was taking her from behind over the bonnet. A few minutes later a white van pulled in, now we have had sex in public before and like been watched but 4 guys in their early/mid 20s got out and walked over to us and asked us if we were wanting fun. Now I dont know if it was the beer talking or my fantasy of watching my girlfriend getting fucked by other men but I said Ok but expecting Sue to slap me and drive off home bet she shocked me and said why not. The guys said why don't we come over to their van which we did and they opened the back door and there was a mattress inside, obviously they had done this before. Sue got in and stripped off and started masturbating in front of them, I was nervous but excited at the same time.After a few minutes shes just said come on whos first and one just dropped his jeans and no foreplay just entered her. I nearly came when I saw Sue being fucked by by a complete stranger but she wasnt finished she turned him over and was straddled him she said she wanted a cock up her arse and one in her mouth which the boys didn't need any encouragement and within seconds she had 3 cocks filling her 3 holes all fucking her bareback. After about 10/15 minutes of swapping round each taking their turn in her arse, puusy and mouth two had come in her now cum filled pussy and one in her bum. When I thought that we were finished sue asked where the last guy was and didn't he want a turn, I couldn't believe it Sue was been a whore in front of me and I was loving it. The 3 guys smiled and just said we were just getting you ready for him. Now this guy was maybe 10 stone wet through but when he got his cock out I dont think i'm exaggerating it was probably 11" and very, very thick. Sue looked at it and she just said thats not going to fit but i'm going to try. She told him to get on his back so she could take as much as she could. What a lovely sight watching this huge cock stretching her cum filled pussy. It took her a minute but she took the whole of him and was riding the life out of him, then she turned him over so he was on top pounded his meat into her. He didn't last too long but when he came he filled virtually doubled the amount of cum in her pussy. The guys thanked us and we all departed saying we should meet up again but we never did. We got home and had the most amazing sex talking about what had just happened and it was my first time fucking a pussy full of other guys cum. After this it took us a few weeks but then we got addicted to visiting dogging places then swingers clubs. We are no longer together but if you want to hear of our exploits then let me know