I’ve been going to the same Midlands dogging spot for around 3 years now, it’s a 45 minute drive, but it’s the best way to guarantee my wife not finding out. Saying she wouldn’t approve is an understatement, my marriage would be over in a flash, but she’s just not into sex as much as I am, and at the ripe young age of 28 I have needs. I have a job where I do emergency call outs, so getting out isn’t a problem. Anyway, the place I go to is pretty much a certainty for action, with many regular couples, especially on Saturday nights, but last Thursday I actually did get a call not far from there, so by the time I’d finished my job it was 10 o clock, I thought I’d check it out. I knew as soon as I pulled up in the car park, it was on. There was a Van next to a car, providing a shield, I could see a few blokes hovering around. I locked my car and made my way over, there was a guy at the car door fucking a woman doggie style as she knelt on the passenger seat. At the same time she was sucking off a bloke in the drivers seat, presumably her husband. The melee of blokes standing round with their cocks out made it difficult to see, but her arse looked pretty amazing, and I assumed it was her skirt around her waist, aside from that she was naked. I had my cock out, playing with it half heartedly, I didn’t want to unload before I got my turn. I managed to get closer to the action just as the bloke fucking her pulled out and shot over her arse and skirt, at which point she turned round and said “fucking hell it’s in my hair, you needed that didn’t you?”. Immediately, my brain recognised the voice before my eyes recognised the face, oh my god! It was my wife’s older sister Lisa, before I could even engage my brain to act, she made eye contact with me, she was quicker to react than me by saying “Ooh, I didn’t expect to see you here” at which point the bloke in the car moved across to look out, it was Dave, her husband. For a second nobody said anything, until Dave broke the silence “lads, this is the brother in-law, make way for him, he’s come a long way”. The blokes were all laughing and jeering “is that yer sister mate?” Lisa responded “sister in-law actually” I was still gobsmacked, my cock had flopped to a semi, Lisa eyed it, “well I suppose, we’ve both got a secret to keep then, come here” I stepped forward, and she pulled me towards her, there was a raucous cheer from the blokes when she took my cock in her mouth. I looked down at her big tits and shaven fanny, her body was so good, she kept looking up and making eye contact as she sucked me, my cock started to spring back to life as I began to accustom myself and relax, after a couple of minutes she said “do you wanna fuck me?” what a fucking stupid question, I nodded, then managed to utter “can I lick you first?”. She just smiled, and opened her legs, laying back onto Dave, I knelt in front of her and licked up her inner thighs, I could smell her sweet fanny as I got closer, I inhaled hard to take as much in, when my tongue lapped over her lips she gasped, my tongue found its way between them and I began to lick and slurp at her juices, I couldn’t get enough, delving it in as deep as I could for as long as I could, then it found it’s way down to her arsehole, which I circled and savoured before teasing it open with the point of my tongue, her fingers were rubbing frantically at her clit, and I felt a warm flood of fanny juice over my tongue, I slurped it down. I rushed up quickly to fuck her as I knew I was about to cum, my cock slid in to her hot slippery hole, and I began to thrust hard into her. Her tits were slapping against her chin, she was looking at me intensely, Dave began egging me on “go on son, make her squeal”, I bucked harder and faster, I was about to pull out and unload on to her stomach, but she stopped me with her hand “cum in me” she ordered, I didn’t need asking twice, I pumped my seed into her for what felt like 20 seconds before I withdrew back, and my cock flopped out. Again the blokes cheered me, before one guy barged through and unloaded his jizz all over Lisa’s tits and face, Lisa had her mouth open catching as much as she could. Normal service had resumed. I stayed and watched as she took on the other guys, she didn’t let anyone else cum inside her, always over her tits or back or in her mouth. When the next guy fucked her after me, she made a point of keep sucking my spunk off his cock. I couldn’t believe the difference between the two sisters, Lisa, only 3 yrs older was a complete slut, she loved cum, I watched her fuck 6 other blokes that night, older, younger, Black, white, Indian. She devoured their cum each time. I even unloaded into her mouth myself after I had a chance to recharge. I waited till the last guy finished and left, and she cleaned herself up and got dressed, we divulged the events of the night, and they told me they’d been dogging for years, and I told them the same, then they invited me to join them at their home on Sunday in a private affair, to which I accepted and entered into another sordid chapter of my life, which I’ll tell you about soon.