My wife had been a bit of an adverturous girl before we met, many boyfriends and one guy who had shagged her in the arse which was one place that she never let me near, the occasional finger in the bum but nothing else. There was one night very early in our relationship when my mate Stu was visiting from out of town, he and I had stayed out late on the piss and when I came home Sue was fast asleep, but the next morning I felt her up and after going down on her, slid my cock into her and fucked her quite hard so that Stu could hear. as he was in the bedroom next to ours. I whispered in her ear that Stu was probably jerking off his pretty big cock listening to us - with that Sue became noisy which she never usually was and her calling out fuck me hard pushed me over the edge and I filled her full of cum as she orgasmed too. Sheepish looks as we all got up half an hour later and that lunchtime Stu left to go home. That night I was up for more sex and as we got intimate Sue said that she thought that I could have at least invited Stu in so that she could of had a threesome seeing as she had two men in the flat the night before. I was as hard as iron and asked if she was serious, she just smiled and said it was a joke to make me horny. I started using Stu in our sex talk and she would get so wet but would always say tht her comments on him were just a joke! 10 years went by and kids and house committments had made our sex life stale , I had fucked 3 other women and a visited quite a lot of prostitutes but sharing Sue was my fantasy that gave me a hard on every time Stu and I had lost contact but caught up through Facebook and had a beer to catch up on lost times, I told him what Sue had said and he admitted that he had shot a load listening to us fuck and her calling out was fantastic, I told him that me talking to her and mentioning his big cock is what made her get very unusually noisy, we both sat in the pub with hard ons! That night I told Sue that Stu and I had caught up and that I had told him about her "joke" on the threesome, as I said this a quick feel of her pussy and she was very wet, I pushed myself on top of her and forced her legs apart and breathed into her ear that the thought of Stus big cock was making her horny! She tried to push me off but I used my thighs to force her legs apart and up and my cock started entering her, I hissed in her ear that Stu's cock was lot bigger than mine and that she will need to get used to the size - Sue then yelled out oh god Stu fuck me I need a big cock and then stopped fighting me and I slipped deep into her. We were like animals and Sue pushed me on my back and rode me holding onto the headboard with her feet flat on the bed taking as much of me as possible, after we had cum I asked if she was up for fucking Stu as I think we need to act out this fantasy. she said that she wasnt sure. I askd Stu around for a meal, the kids were at the grandparents the three of us were as nervous as, the meal was eaten and I went to open some drinks as Sue and Stu packed the dishes in the dishwasher, as I entered the kitchen with a beer in either hand my mouth fell open. Sue was bent over the cupboard her dress over her back the g string as pulled to the side and Stu was feeding his 9 inch and very thick cock into my darling wife and she had a red face and looked like she was going to explode. My cock was about to rip my pants open it was that hard, I put the beers down and just stood there gobsmacked as Sue had an orgasm and Stu roared out that he was cumming. A stoney silence took over and Sue rushed off to the toilet cum dripping onto the floor as she ran, I heard the shower start, and I went in to check on her undressed and climbed in touching her pussy I could feel Stus cum get sticky as it mixed with the water, I said that she looked so sexy Sue kissed me and grabbed my cock and we fucked standing up. I asked her if she wanted me to ask Stu to leave, with a glint in her eye she said that she hadnt had her threesome yet, we all ended up in bed with Sue taking Stu's big cock again doggy style as she gave me a great blowjob and we both took turns at her for the next two hours until we fell asleep. I woke up to the bedrocking and could see Sue and Stu lying side by side as he fucked her - as I stood up I could see that he was in her arse - the fucking cunt! and I heard her cum as he fucked her in the arse again my cock was as hard as rock and this time I just had to jerk off watching them. Stu calls by every few months now and spends the night with us and I even get to shag her in the arse and have even started cleaning Sue up after she has been serviced so I guess everyone is happy......