We live in the Midlands and go to Scotland for our holidays every year. We like to camp along the wild coastline away from the normal holiday spots. My wife who is in her mid forties (like me) likes to sit in the outdoors in the nude and this is one of the reasons we camp in the wild. This particualr holiday we had chosen a spot on the Isle of Mull right beside a golden beach. The wetaher was warm and sunny and we were both sunbathing by our tent in the nude. It was lovely. When my wife feels the sun on her pussy she gets turned on and more often than not we end up having sex not long after we have started sunbathing. On this day she was lying on her back with the sun warming her gorgeous body, her ample tits with dark brown nipples, her flat stomach, and her trimmed and pouting pussy. I loved looking at her, and couldn't keep my hands off her. My cock was semi-hard while I lay next to her running my hands over her body. She lay there taking it all and enjoying the attention. Suddenly I felt that we were not alone and looking up saw a man close by sitting on a rock watching us. My instinct was to warn my wife and dive for our tent next to us. I whispered to my wife that we were not alone and that we should quickly hide away. To my utter suprise she simply looked up, saw the man, and then propped herself up on her elbows. Her tits in full view and her legs slightly open. She smiled at him and then lay back, this time reaching back with her arms and stretching, showing off her body in its entirity. I was gobsmacked but also turned on. I had always wanted my wife to be seen by another man and now it was happening. She brought her arms down and one hand carressed her breasts and the other moved over her belly to her trimmed mound, her fingers parting her puffing labia. She was turned on and I could hear her breathing change. Without warning she began to wank herself, rubbing her clit vigorously and pulling at her nipples. I couldn't decide who to watch, my horny wife or the man who was now very clearly turned on too. He stood up and walked closer to get a better view, standing about a foot or two away down by her feet so that he could look at her pussy. He had his hand down his jeans and was rubbing his cock like mad. My wife looked up at him and asked his name. He told her - "Mike". She said in a husky, about to come voice, "Show me your cock Mike" and opened her legs wider. I just sat there watching but really turned on, my own cock rigid and aching to fuck her. Mike pulled down his jeans and his pants, his cock springing out, hard and ready for her. My wife, still on her back, beckoned him over, and then for the first time she turned to me and asked if it was OK if she aske Mike to fuck her. I could only nod and smile weakly. This was beyond a dream now. Mike knelt down beside her, his cock to attention close to her face, and he reached out, touching her body, first her tits and then down to her now very wet and fully aroused pussy. She responded by arching her back and moaning loudly, while she searched for the tip of his cock with her mouth. Finding it she began to suck him hard. This was just fantastic and I began to rub myself wanting to come over her face. Mike was rubbing her pussy hard and fast, her lips open and the mouth of her cunt clearly visible. She took her mouth offhis cock and pulled him round between her wide open legs. Raising her hips she took his cock with her left hand and guided it into her pussy. He helped by pushing slightly and without any effort he slid inside her, right up to his hairy ball sack. This was too much for me and my come spurted out, missing my wife's face by inches. She simply laughed and began to fuck this stranger like she fucked me, hard and with passion. He was holding himself above her, she had his shirt up around his chest and we watched as his cock pulled out and then pushed back in, out and in, out and in, into her pussy. It was hugely erotic and it was clear he was loving it too. Eventually after what seemed like an age but was probably only minutes, he began to speed up and by the look of concentration on his face he was close to coming. My wife looked at me, a question on her lps, and I nodded before she could utter the words. She turned to Mike and said - "Come in me, fill me up, fill my cunt, go on fuck me - fuck me!" Mike pumped harder, she lifted her head and pushed her tongue into his mouth, snogging him hard. Funnily this turned me on even more and my cock was instantly hard again. She reached out and grabbed it, roughly wanking me while she was being pummelled by this man we didn't know. He kept going for a few more strkes and with a huge gasp he came deep inside her. He uttered a deep growl and she grunted as she always does when I come inside her. This time it was hugely erotic to hear her doing this with another man's cocl insode her. I looked down, relishing the sight of her pussy lips around his thick cock that was beginning to wilt. He lowered himself onto her and she wrapped her arms around him. I continued to play with my achingingly hard cock. He rolled off her, his dick flopping out of her pussy with a slopping sound. I looked down and felt a surge of ecitement when I saw his semen beginning to ooze out of her pussy and drop onto the grass between her legs. While looking at this wonderful sight, I wanked myself hard, rubbing saliva over my glans to bring me off quicker. My wife lay back, looking at me and then told me to come over her face. Close to coming I moved up to her head, and shot my load of cum over her lips, her cheeks, and her closed eyes. Mike lay beside her and watched. The sun beat down on the three of us, and satiated we dozed off into a relaxed sleep. A little later Mike got up, kissed my wife deeply, dressed himself, and disappeared over the hillside back to where he came from - where, we don't know. Meanwhile, we crawled into out tent and relived that moment of reckless abandon again and again as we fucked ourselves through the rest of our holiday.