We ended up hooking up with a sub/dom couple, and we started seeing them regularly. John was well-built, in good shape and extremely dominant, and I soon found I was eagerly yielding my mouth and my cunt to his huge cock. Rebecca, by contrast, was slender and petite, a true submissive, and John encouraged Stewart to take control of her compliant body, bending her to his sexual will, and Rebecca enthusiastically responded by devouring Stewart's cock with her greedy mouth and her tight shaven slit.

Then one weekend, after a few drinks and preparing to shed our clothes for another bout of foursome sex, John announced that Rebecca was to be fucked in the arse and that we should both lend a hand! Stewart and I regularly enjoyed anal sex, but never before with another couple and we were both immediately turned on at the prospect.

Rebecca shrugged out of her little black dress, under which she wore not a stitch, then kicked off her heels and got straight down on her knees in a low crouch, her head resting on her hands, with her bum raised high in the air, while John rapidly stripped off. At John's direction, Stewart lubed around and inside Rebecca's arsehole, then his fingers prised her buttocks apart. I oiled up John's swelling veined cock until it was rock hard in my fist and then I guided it to her exposed orifice, for him to press into her slowly before he sank his entire length in her.

Stewart and I watched every move as John's big glistening cock began pistoning back and forth in Rebecca's fleshy clasping ring. His shaft looked impossibly huge wedged firmly between her tight rounded cheeks, yet from time to time, he slipped out completely so I knew immediately to grasp his rearing cock and cram it back into Rebecca's increasingly gaping hole, and the pounding fuck would resume. Rebecca was working on her clit feverishly throughout until she came off with a drawn out moan, her legs visibly trembling. John then drove into her again and again with renewed force, sweating from the exertion, until he suddenly gripped her hips fiercely, holding her motionless impaled on him. When he let out a low groan, I knew at that moment he was pumping his seed up her arse. Regaining his breath, he slowly pulled out, unplugging the shiny bloated purple head of his cock, to reveal her ravished arsehole, which pouted open in spasms, finally discharging all the creamy semen he'd just emptied into her.

Having witnessed close at hand this obscenely arousing display of bareback anal, Stewart and I were turned on no end. Stewart later told me he certainly wanted to shove his cock into Rebecca's accommodating arsehole, though I admitted I was a little apprehensive at first, doubting whether I'd be able to take John's enormous cock in my arse. But I reminded myself that Rebecca was much smaller than I. So it was inevitable that I was soon surrendering my arse repeatedly to the hard demands of John's probing cock.

Yet even with some practice and not a little lubrication, I would feel stretched to the limit every time the bulbous head of his cock breached my anus, while the girth of his cock always seemed to pack my insides to capacity. Still, I was soon able to envelop his whole throbbing erection in my rear, and he would always seek to bury every rigid inch up me, right to his smooth heavy balls.

It seemed Rebecca also had an insatiable appetite for anal sex, and now Stewart was happy to oblige at every opportunity. He'd apply lube to the hairless valley between her buttocks, working it into her anus and nudge his slick swollen cock to her rim, to then ease himself inside her, rapidly submerging his whole cock in her squirming bum. And when he began driving into her, she urgently pushed back onto him, drawing him deeper inside her.

I loved watching Stewart take Rebecca hard and deep up the arse, and I always got off knowing that Stewart was equally turned on seeing me speared on John's cock. Sometimes, the four of us would fuck all at the same time: lying back side by side on the wide sofa, wanton and wide open, Rececca and I would lubricate our arses, inviting a good reaming, while the guys oiled up their stiff cocks, flaunting their hard-ons before us. John would then grip my ankles, tilting my bum up, so I could reach down between my thighs to slip his rigid cock into my arse, and seconds later I'd feel him thrusting powerfully into my depths. And of course, Rebecca and Stewart would to be doing the same. We'd fuck that way, us girls working our clits, watching each other, with the guys ploughing into our rears, stretching our slick holes around their shafts, matching each other stroke for stroke. It was then just a matter of who came first, though John claimed that whenever he felt my insides convulsing and clutching around his cock in a heated climax, that would always instantly trigger his ejaculation. And sure enough, moments after my orgasm had subsided, I'd feel him shooting his cum into my darkest recesses.

One evening, John suggested that Rebecca should take on both Stewart and himself, and that I should 'assist'. Wearing only a studded black leather slave collar, she presented herself to the three of us, naked and freshly shaven, to be inspected. And knowing that shortly she would totally submit to being sodomised by both John and Stewart, Rebecca had clearly prepared herself first, with a black latex butt plug fully inserted in her rear. I looked on with lustful envy, imagining the sensations she felt, as our two men overwhelmed her: chewing her labia, nibbling and tweaking her clit, their tongues and fingers delving deep inside her cunt, sucking and twisting her swollen dark teats.

Then John ordered her onto her knees and cuffed her hands securely behind her back when she sat back on her haunches. Each in turn fed his cock into her smeared mouth, compelling her to fellate them one at a time, with Stewart following John's commanding lead. At one point, as her head bobbed sucking wetly on John's rampant erection, he grasped her head by her hair and pulled her forward onto his cock, until her face was practically buried in his groin, thrusting so far into her throat that she was gagging involuntarily, while she smothered his straining shaft with foaming saliva.

Having both literally fucked her mouth, they released her hands, to take her anally on her back, deep and very, very hard. John instructed Rebecca to spread her thighs and raise her legs high and then he positioned himself behind her head to hold her ankles, pulling her legs right back and wide apart. Pinned down this way, she looked very exposed and accessible. I was then invited to slowly withdraw her butt plug, just a tantalising inch at a time to ultimately reveal her slicked receptive anus, for Stewart to penetrate her first. He slid in smoothly and then began fucking her in earnest, lodging his entire cock up her arse with every other stroke.

At intervals, the guys switched around, Rebecca taking them one immediately after the other, almost without respite, until her arsehole had become dilated and red from the ruthless invasion of their cocks. And each time John or Stewart withdrew, I was mesmerised by the sight of their slippery glazed cocks, so swollen and brutish-looking as they emerged from the inflamed, enlarged ring of her plundered arse.

Of course, held down this way throughout, Rebecca's hands were free to frig her raw-looking protruding clit, and she brought herself off - God knows how many times! - while they continued thrusting powerfully into her to the point when they had both flooded her rectum with their semen. As a kind of finale, Rebecca clawed her buttocks apart, and smiling slyly at me, she flaunted her abused aperture as all their spunk dribbled out of her lasciviously.

Later that night, I ended up naked on my knees with my legs wide apart, while my clitoris was teased mercilessly and my anus was tongued, then lubed and fingered by the other three. Next, my arse was ritually opened up further with a greasy dildo until my sphincter relaxed, and I realised that Rebecca had volunteered for this duty.

It was like a warm-up, before my arse was cleaved by the hot thing, first by Stewart. He bored straight into me and I took his cock up to the hilt with every thrust. Without warning, John knelt squarely in front of me and crammed his rampant prick into my mouth. Only hours earlier, their rigid meat had been probing Rebecca's flesh, and here I was now, well and truly skewered and in a state of heady arousal, with the juices freely seeping from my overheated pussy. Sensing my needs, Rebecca moved in closer and her fingers reached up between my damp thighs and she began to expertly manipulate my burning clit. Soon I was right on the edge, until I climaxed uncontrollably, and only then did Stewart ejaculate, pulsing deep inside my back passage.

John leant forward and hoarsely whispered that he had to fuck my arse there and then, while I was still on all-fours - vulnerable, wide open and available. My mouth full of his cock, I could only nod in assent. He promptly positioned himself behind me, rubbing the wet bulbous head of his cock along the cleft between my cheeks, telling me how pink and slick and enticing my arsehole now looked. Pressing harder, he entered me fully with his cock, while my rectum was still awash with Stewart's cum.

I found I could easily come again with Rebecca now lightly brushing my tender clit, while John relentlessly fucked my slackened arsehole into submission, repeatedly embedding the full length of his mighty prick in me, until I felt him spurt his molten spunk into my bowels. And all the while I was being hotly buggered, Rebecca had goaded the three of us on with deliciously filthy suggestions, watching intently, as she pulled on her hard nipples.

As time went by, I came to realise how addictive our anal games had become, and that I was succumbing to the most base urges, craving more and more anal stimulation, with fingers and tongues and dildos, but especially hot cock.