It was supposed to be the "quiet carriage," but it was far from that. A couple of cackling fish-wives gossiped behind me in voices thick with the rattling catarrh of Superkings smokers. Across the aisle a stroppy looking teenage girl discussed her latest boyfriend's endowment on her mobile phone in such a way that the entire carriage now probably knew that "Darren", whoever he was, wasn't as long as "Phil" but much thicker than "Gary". Quiet carriage or not I decided the only way I would get any peace was to drown out the ambient noise with my walkman, so I stuck the plugs in my ears and felt the tension disappear from my muscles as music filled my ears.

Snapped out of my reverie by movement on the platform outside, I saw with some horror that a woman with a young girl and a baby in tow was preparing to board the train. She was in her mid thirties, carrying a small baby and holding her hand of a little girl. I realised with horror that there was every chance they would occupy the seats opposite me. That was all I needed, I thought: a  grizzling brat two feet away from me for the remainder of the journey to London. The woman's daughter settled on the seat facing me, she handed her the baby, she set about struggling with the folding pushchair. I sprang up to help her, folding the contraption up and lifting it onto a luggage rack. As I was doing so I felt her tit press against my arm. It felt soft and fleshy and a little frisson of pleasure ran through my body. As she bent to retrieve the baby from her daughter I smelt her hair: fresh and perfumed. Sitting back down, the fragrance of her hair still sweet in my nostrils, I closed my eyes and turned up the volume.

When the track I was listening to finished, I heard, well, nothing. Switching off my walkman, I was amazed to find that the carriage had fallen strangely silent. The  girl, who must have been fourteen or fifteen, was engrossed in a book, and the baby was sleeping in his mother's arms. I looked at the children's mother, who smiled sweetly at me, flashing perfect white teeth and making cute dimples form in her cheeks. She was stunningly beautiful. I had been so appalled by the prospect of a screaming brat destroying my peace that I had failed to notice her earlier. She was wearing a light cotton dress, the bodice of which restrained a pair of very large round breasts. Long red hair the colour of burnished copper fell onto her bare shoulders and smooth long legs emerged from beneath the skirt. I watched, rapt, as she unbuttoned her dress at the neck and fastened her baby's mouth to her milky-white teat, allowing him to suckle the fat tip of her dark-pink nipple. I suddenly realised that I was staring at her breasts while she was breast-feeding and I looked away in panic. She flashed me a helpless, "Sorry, but I've got to do it somewhere" look, breaking into that cute smile once more. In reply I managed a silent, "Don't worry, but sorry for staring at your knockers" sort of look in reply.

I studiously observed the countryside racing past outside (or, as this was a British train, crawling past) to avoid the temptation of looking at the woman's full breasts. Actually, I don't find the sight of a nursing mother particularly erotic. Beautiful yes, but not erotic. But then I noticed that the baby had finished feeding and the woman had yet to button up her dress. One entire breast and half of the other were on display to the world, or, apparently in this case, me. She had full, ripe tits; the kind one knew would tremble deliciously as she was screwed, the sort of bosom that, when glistening with baby-oil would make a perfect snug furrow to fuck. Momentarily I framed an image of my prick pistoning between her melons, my sperm falling in thick ropes across her beautiful face, and I felt my cock harden in response. I caught her eye once again and noticed that she was staring at my tenting crotch.

Finally, she gently lifted her exposed breast back into the lacy cup of her bra and buttoned up the front of her dress, smiling at me as she did so. Surely she couldn't be coming on to me? No. Far more likely she was just one of those trendy Islington mothers who had no qualms about getting her norks out in public.

"Now, Lizzy," she said to her daughter, "Will you be a good girl and look after Jacob while mummy goes to the toilet?"

"Okay Mummy," the teenage girl said sweetly as she was given her sleeping baby brother. I took that as my cue to make for the buffet car and get myself some lunch.

As I made my way back to my carriage, I noticed that the woman's seat was still unoccupied; the baby still sleeping and the teenager still engrossed in her book. I was about to enter the carriage when I noticed that the door to the toilet was open. Inside was the woman from the seat opposite me. I assumed she must have finished her business and was about to return to her seat. I stopped to make way for her, but she remained inside the toilet, looking straight at me. Her look was urgent, almost desperate. It was a crazy thing to do, but I walked into the toilet and locked the door behind me.

Our gazes met for a split second before she lunged at me, tugging at the buckle of my belt and wrestling with the buttons of my fly.

"What's your name?" I asked in a whisper.

"Does it matter?" she replied, shrugging. "I'm not looking for romance you know. I'm married."

"So am I. Well, attached anyway," I said, "And yes, it does matter."

"Anna," she said.

"Tom," I reciprocated.

Putting my hands on her shoulders I leaned to her and we kissed, tentatively at first, then warming to it, our tongues darting into each other's mouths. She moved forward to make contact with me and I let my hand travel up the back of her leg, lifting her skirt in the process. She began to rub her crotch against my rock-hard shaft, and through her thin panties and my jeans my cock could feel the heat of her hot cunt lips. Sitting against the small basin, her legs went around my back, her shoes falling to the floor as she vigorously rubbed her vagina against my straining member. I unbuttoned the top of her dress and put my hands on her tits, lifting them out of the demi-cups of her lace-trimmed bra. They were beautiful. Enormous pale breasts capped with suckable pinks nipples already engorged with lust. I lowered my face into her fragrant cleavage and tasted them, swiping my tongue in broad strokes across her fat nipples making her inhale sharply and grind her cunt even more insistently onto my hard shaft.

I let my hands travel down from her bosoms over her tummy, still bearing the slight roundness of her recent pregnancy. Then pulling her legs apart I dropped to my knees and kissed her panty-clad mound, inhaling the musky fragrance of her sex. Impatient to have her cunt tongued, Anna hooked the gusset of her panties to the side and I slid my eager tongue into her syrupy box and began to eat her cunt-meat greedily. Anna grasped my head and pulled my face into her crotch, her sopping gingery bush spreading her juices over my face. After a few minutes of this oral assault I felt Anna's legs tense and looking up I saw that she was pulling hard on her erect nipples, her face contorted as she came. As she climaxed, my mouth was flooded with thick juices from her cunt, which I swallowed hungrily. Standing up I kissed her and let her lick her tasty fuck-juices from my face. Then, grabbing her by the bottom and lifting her up, I set her down, turning her around so she faced the wall.

"Put your hands up on the wall," I directed her. She did so, and I reached to her hips and caressed her bottom through her panties. Hooking my thumbs in the waistband of her white cotton panties, I pulled them down and off. She stood nude from the waist down, and I stared at her lovely, bare bottom, smooth and round and white, pushed provocatively in my direction. I caressed her rear, kneading her cheeks and running my hand between her buttocks, rubbing along her wet pussy and anal area as she moaned and squirmed under my exploring hand, her head uplifted, eyes closed.

Kneeling behind her, I spread her cheeks and admired her exquisite derriere, the small, pinky-brown anus with its halo of gingery fluff and the soft pussy lips, lightly framed with pubic hair. I pushed my face between her shapely buttocks and worked my tongue into her anus.

"Oh fuck yes!" she hissed, then groaned as she surrendered her bottom to my probing tongue. "Lick my arsehole you dirty cunt."

That these obscenities were delivered in a rather "cut-glass" accent simply made them all the more prick-stiffening. She thrust her delicious rear into my face as my tongue massaged her clenching and bulging shithole. I spread her cheeks wide, and her soft hips moved under my hands, her leg muscles tightening and relaxing as she moved her body in response to my mouth, which eagerly serviced her dainty bottom.

Getting to my feet, I inserted my finger in Anna's squirming behind as I unbuckled my belt and pushed down my jeans with my free hand. Anna, my finger working in and out of her hot bottom, turned to look back hungrily as my swollen prick came free.

I looked inside the paper bag containing my lunch from the buffet, Anna watching me as she leaned against the wall, bare arse prettily extended and waiting, her long red hair partially covering her face. Rustling around I found two little containers of butter. I opened them and dipped my fingers in. With my left hand I opened her cheeks and my right hand brought the butter to her anus, spreading it around on the hot, silken flesh, then easing some up inside her rectum.

Her breath came short and fast now, and I stood, holding her buns apart with both hands and aiming my prick at her pretty hole. The head of my cock brushed her cheeks as I placed it at the entrance to her bottom. Surprising me a bit, she reached behind, grabbing my cock with the hand on which she wore her wedding ring, and guided it to her anus. Then leaning back slightly, pushed down on my meat so my bell-end popped past her sphincter and into her rectum. She moaned and returned her hand to the wall as we both paused with just the tip of my cock inserted in her behind. Her butthole was well lubricated from the greasy butter and my prick had slipped past the first obstacle easily. She began to grind her hips in a slow, circular motion, working my shaft slowly up her shitter. I tried to be patient and let her set the pace. Inch by inch it slid inside her as she pushed down, groaning and panting. I looked down at the sight of my cock disappearing up her shit-pipe, and my cock throbbed with desire. Anna felt this, and answered with a squeeze of her rectal muscles that almost made me come on the spot.

"Oh my God," I whispered. "Anna . . . your arsehole is so tight . . ."

"Your cock is so big, more like it," Anna moaned in reply. "God, you're really filling my arse."

"Too much?" I asked, only half seriously.

"Fuck no!" Anna replied in apparent panic, "I love it. Just bugger me hard."

"You really are hot for it aren't you?" I said to her as I continued to gently slide my cock into the buttery depths of her bowels. "Doesn't you husband sodomise you?"

"He's away on business so much," she said sadly, "And no, he won't fuck my bum. He thinks it's dirty."

As she said this, I couldn't wait anymore. I pushed my cock the remaining four inches into her rectum as she shuddered, my prick now buried ball-deep in her behind. I ground my pelvis against her soft cheeks, stirring her bowels with my cock as I clutched her hips, pulling her back onto me.

"But it is dirty, isn't it Anna?" I whispered in her ear between kisses on her soft, white neck, "Letting a strange man shove his dick into the hole that you shit out of."

"Yes," she gasped, "It's filthy. Perverted."

"So what does that make you?" I goaded her, enjoying the fact that the dirtiness of the act was clearly what made this otherwise respectable young wife and mother horny.

"A filthy, perverted little slut," she said with a hint of pride, thrusting her itchy butthole back and forth on my slippery cock. "Oh, fuck my shitter, you dirty big-cocked bastard!"

As slowly as possible now, I withdrew my slick cock from her bottom hole, and we both gasped at the sensation of my tool ever-so-gently sliding out of her. Soon I was completely out, only the tip brushing her anus again. Her pinky-brown shithole now gaped slightly from its violation, and I slipped the head again into the open hole as Anna trembled beneath my hands. Slowly again I pushed up her greasy guts, my cock clutched by her warm, tight arsehole as it slipped deeper and deeper into her lewdly farting back-passage.

For several more thrusts we moved slowly, until I felt Anna's bottom become more accustomed to me. Suddenly, her behind swooped down onto my cock, it's entire length sliding into her, and she began to ride it, pulling off, then plunging back down on it. In turn I began to thrust harder and deeper into her shitter, my balls banging against her fanny as I held her hips as still as I could. I moved my hands to her chest, and caressed and pinched her perfect, bare breasts, hugging her tight to me.

"Oh God," she moaned, talking more to herself than to me. "I love this so much. I'm sorry Giles, I can't help it."

"Who's Giles?" I asked her, stroking her lustrous red hair.

"My husband," she said quietly. "He's a good man, but he can't make me feel like this. Oh fuck! This is so wonderful. You're going to make me come. Your huge dick is making me come!"

"Oh fuck, you really are a dirty little slut aren't you Anna?" I panted in her ear, as deep in her bowels I felt the head of my prick nudge against the warmth of a turd "I can feel the shit in your arse Anna, you filthy bitch."

No sooner had I mentioned that, Anna was sent careering into a powerful come that made her body shake and her shit-ring contract like a rubber band around the shaft of my prick as I buggered her.

We both grunted and moaned now as I slammed deep up her arsehole, pulled out, leaving her anus gaping, then rammed back in to the hilt, watching her beautiful buttocks push against my groin on the inward thrusts as my super-hard cock churned the contents of her bowels. This was one of the sexiest things I had ever seen and I told her so as I began to squirt my boiling sperm into her rectum, spurting what felt like gallons of jism into her bowels. I reached around to her wet pussy, finding her clit and stroking it gently as my load erupted into her, and she shook with the force of a powerful orgasm, moaning as my hand stroked her delicate trigger and my prick spurted up her lovely bottom.

When I had emptied my balls into Anna's bottom my prick began to soften in her rectum. I held tightly onto her soft hips to stop my now almost flaccid penis from slipping out of the buttery grip of her exquisite back-passage and reached down to her dripping cunt to masturbate her some more.

"No," she said, not terribly convincingly, "I did really need to go to the toilet when I came in here.  I have to go."

"So do I Anna," I chuckled, "So do I."

"Oh, you dirty fucker," Anna moaned as she realised what I meant, my piss slowly filling her back-passage, "Fuck, FUCK! I can't believe a man is pissing up my shitter!"

"Tell me how it feels, Anna," I said as I nibbled her earlobe, my fingers squelching in her cunt.

"Fantastic!" she panted, "It's the filthiest, most disgusting, most perverted thing I've ever done. I love it."

As the last of my piss flowed into Anna's guts she came again, her cunt squirting viscous juices over my hand as I frigged her. When she stopped shaking, I held her hips and slowly pulled by softened prick from her flooded bowels. As the tip emerged, Anna's anus snapped tight shut and she swivelled round on her heels to sit on the toilet. Her face was level with my semi-hard cock and I held it out to her. She shook her head, but I could see by the lust in her eyes that she was unable to refuse. Poking out her tongue, she licked the bulbous tip, then took the shaft into her mouth as she tasted the heady cocktail of piss, sperm and the streaks of her own pungent crap clinging to my prick. As she sucked noisily on my hardening cock she relaxed her battered sphincter and let my piss quirt into the toilet, followed by a mass of sperm and shit. I felt my cock stiffen in her mouth as I listened to her evacuate her bowels, farting wetly as the last of the piss-enema spurted from her anus.

Wanting to discover just how dirty Anna was, I pulled my wet cock from her mouth and turned around. Bending over slightly, I presented her with my arse, pulling my buns apart so that she could see my puckered anus. I sighed with pleasure as I felt her delicate tongue tease the wrinkled flesh of my hairy shithole. I've had a few lack-lustre rim jobs in my time and this was not one of them. Anna was practically French-kissing my arsehole, digging her tongue into my chute. I looked between my legs to see that Anna was wildly frigging her hairy pussy as she rimmed me. The horny bitch was getting off on eating my butt!

My prick was once again rock hard and I wanted another stab at her arse. As good as her analingus skills were, I turned around and presented her with my bloated tool, dripping with pre-come. Meekly, she got to her feet and turned to face the wall. She bent over and pulled her buttocks apart, thrusting an elegantly manicured finger into her slack anus in case I was in any doubt about where to fuck her. She was clearly resigned to the prospect of a further buggering.

"Oh Christ, yessss!" she gasped as my thick pole stretched her anus once more and began to snake up inside her poop-chute. "Make me come!"

I buggered her hard, ramming my prick deep into her bowels in long strokes, my balls slapping against her cunt-lips. I reached around to squeeze her breasts, pinching her nipples and feeling them moisten with the milk that filled her tits. I thrust my cock up into her arse, feeling the walls of her rectum caressing my shaft as I sodomised her. Despite having come minutes earlier, I knew I was not far off coming. Thankfully Anna began to tremble in a climax as I neared my peak. As her orgasm subsided I told her that I was about to shoot. I groaned with lust as I pumped jet after scalding jet of jism forecfully into Anna's bowels, but then, in a single deft movement she disengaged her bottom from my prick with a lewd slurp and turned on her heels, dropping to her knees and taking my throbbing prick into her mouth, hungry for the last drops of my cream. Closing my eyes and throwing back my head I emptied what little semen my balls still contained into her lovely mouth, her slim fingers milking me for everything I had. Finally the last spurtings of my cock waned and my dick slipped from her mouth.

Getting shakily to her feet, Anna grabbed a handful of toilet paper and prepared to wipe her plundered bottom.  Kneeling behind her, I obviated the need for that by cleaning her with my tongue.  Her once tightly puckered anus was loose and puffy from having been fucked so hard and it seemed to flutter around my tongue as I licked it.  The taste of a freshly-buggered anus is the most erotic I know, and Anna's violated orifice was raunchier than most.

I sensed she was holding back, so I pushed my tongue as far as I could into the yielding mouth of her bottom, French kissing her arsehole.  With an unladylike grunt, Anna worked her rectal muscles, sending a thick gob of slippery sperm belching into my mouth.  I savoured the strong flavour of Anna's bowels and the saltiness of my spunk before swallowing it, just in time for her to release the rest of my load from her spasming shit-chute into my mouth.

When I was done she wiped my spit from aroung her anus, slipped on her white panties and lifted her tits back into her bra.

"I'll leave first," she said, "Give me a few minutes before you emerge.  I don't want Lizzy to get suspicious."

I was speechless. Gone was the submissive anal slut who minutes earlier had been grinding her arse onto my cock. Now Anna was in control, talking as though she were organising a parish council meeting.

With that she was gone. I suddenly felt sorry for her: a sexy young woman, weighed down with offspring and all but ignored by an inattentive husband; then suddenly, on a long train journey, she gets a horny itch in her butthole which only a sound buggering can satisfy. She was simply one of those marvellous women who prefer anal sex to the form of love-making preferred by most people. One of those women who can only come and come hard while her back-passage is stuffed to the hilt with thick, hard meat. Like Emma, really. As I pulled up my jeans and waited for five minutes to elapse I found myself thinking about Emma, my girlfriend. A woman so unbelievably sexy that even after four years together my prick hardens when I see her. She too prefers her cock delivered via the anal route, squirming in ecstasy as some hugely endowed man (often, but not always, me) fills her beautiful and receptive bottom with his slippery cock. With some excitement I considered her in Anna's position: alone and horny on a long journey, her bottom hungry for sex. My prick stiffened as I thought of Emma here in this G.N.E.R. toilet, her skirt bunched around her waist and her tits bouncing naked beneath her as some unknown man buggered her. Perhaps he would be a huge negro, his muscles flexing as he pumps his enormous ebony phallus into her sexy white bottom, reaching around to frig her hairy cunt. Or perhaps he would be a teenager, an ex-pupil perhaps, finally getting to slake a lust for his teacher's shapely backside, a lust that has simmered for years, enlivened by the occasional glimpse of bra-strap or tit in the classroom, but now spread naked before him for the taking. I realised with a start that I had been skulking in the toilet for rather more than five minutes and also that my cock was once again painfully hard.

An image of Mrs Thatcher being fisted put pay to the hardon in seconds (so much more effective than the thirteen times table!) and I opened the door and made my way up the aisle to my seat.

Anna greeted me with a smile, then looked away sheepishly. She was once again just a normal happy mummy, talking to her daughter and holding her baby. She looked quite unlike someone who several minutes before had been greedily tonguing the anus of a man she had only just met.

"Are you visiting London?" I asked, not wanting to cause her any discomfort, but still fascinated by her, unable not to speak.

"No, we live there," she said, still unable to meet my gaze. Then gesturing with her eyes towards the children, "We've just been visiting their grandparents in Yorkshire."

"Will someone meet you when you arrive?" I went on, "Or will you need help with your luggage."

"No, thank you," she said firmly, "We'll be fine, Torsten is meeting us."

"Torsten?" I enquired nosily, knowing that her husband's name was Giles.

"Yes," she replied frostily, "The au pair."

My eyes widened.

"I know," she smiled, guessing my meaning, "These Scandanavian boys are all the rage."

I bet they are, I thought.

"Well, if there's anything you need . . . " I said, handing her a business card, "I'm staying in London for a couple of weeks."

"Thanks," she said, seizing the card and almost screwing it up as she put it in her pocket, "But we'll be fine."

I decided to let the matter rest there.

As we drew in to King's Cross I helped Anna get her bags and pushchair off the train, resisting the temptation to pinch her voluptuous bottom in the process. From a safe distance, I watched her run up to a young, blond male, perhaps eighteen or nineteen, and kiss him on the cheek. Picking up the bags, Torsten led the way to the taxi rank. He was a good-looking boy, all tousled blond hair and broad shoulders. I wondered how long Anna would last before she felt the itch again . . .