My friends would think I was crazy if I told them, but I guess I just have different tastes in pussy to them. I'm 17, so I'm supposed to be obsessed by pussy, and I'm tall, blond and goodlooking so I get a fair amount of it, but somehow it doesn't quite hit the mark. I'd seen what I want in one of my Dad's tattered pornos: there's a picture of this big-titted bird looking serene with a huge cock stuffed up her arse, which is horny enough in itself, but her cunt... wow! Her cunt is just perfect; fat, succulent lips and covered with thick curly hair. I knew that if I found a girl like that I'd go down on her for ever.

Actually I'm not sure why I'm so obsessed with girls' pussies because if I'm honest it's their bums which really enthrall me. I like a big, jutting pair of jugs as much as the next man, but when I check girls out it's always their butts that I concentrate on. I like big, curvy cheeks, not tight little botties like Kate Moss's, but most of all it's what lurks between those wobbling buns that makes me hard: a girl's arsehole. Nothing enthralls me like the tightly crinkled knot of pinky-brown flesh that guards the exit of a girl's shit-pipe.

My butt obsession I blame upon my sister. She's two years older than me and in every way my perfect woman, but unfortunately, my sister. About a year ago I saw her and some bloke she'd met in a club having sex. Our parents both work in Saudi so Helen and I were sent to England to finish school, and although our uncle looks in now and again we're basically on our own. Helen is a bit of a nympho and is always bringing blokes back to shag, but on this occasion she didn't shut the door. Usually I would lie on my bed and wank like crazy as I listened to Helen being humped in the next room and imagined the scene: Helen stark naked, her big tits bouncing as she straddled some bloke and rammed her slippery cunt up and down his rod. When I ejaculated I would pretend I was coming into her mouth or over her baps, but most often I would imagine that I was shooting my jism up her bottom. In actual fact I assumed back then that anal sex was something that only pornstars did, but it was nice to fantasise.

On this occasion I peered round the door-frame and actually saw what I had imagined so many times: Helen on all fours, panting and moaning as this bloke fucked her from behind. They both had their backs to me so couldn't see me, and what happened next pretty much made me come in my pants. Between her groans of delight, Helen panted urgently to her lover, "Fuck me up the arse." The guy fucking her stopped thrusting and spread Helen's cheeks. Then lowering his face into her crack, he began to lick my sister's arsehole while she moaned and told him how good it felt. Then rubbing some gel onto his knob he aimed it at Helen's puckered anus and lunged forward into her bowels. She cried out in pain and told him to go gently but he just laughed and slapped her arse, calling her a dirty slut. I felt a sudden surge of anger against him and a desire to protect my sister, but of course the guy had a point; Helen was being sodomised by a bloke she'd only just met and was loving every minute of it. I took my prick out of my trousers and began to masturbate as I watched Helen getting buggered, watching the guy's muscular buttocks flex as he rammed his dick into Helen's rectum, imagining how fantastic it would be to feel the tight ring of her anus shuttling up and down my shaft. I wasn't far off coming but suddenly it all stopped.

"Your dirty, disgusting bitch!" the bloke yelled, pulling his prick from Helen's shit-chute with an audible plop, "I've got your shit all over my cock you filthy whore!" Helen just giggled and asked him what he expected to find up a girl's arse, diamonds perhaps. But the guy was in no mood for humour. He wiped his prick on Helen's panties and as I retreated into my bedroom I heard him run down the stairs and leave the house, slamming the front door. I stripped naked and lay back on my bed, jacking off furiously as I fantasised about fucking my sister's shapely behind. I had fantasised about that many times before, but now the fantasy had an added kink: now I was thinking about fucking Helen's shitty bottom.

I was again close to coming when I heard a soft tap on my door. I quickly threw the duvet over my naked and aroused body and told Helen to come in. I knew it would be her as there was no one else in the house. She came in and sat on my bed. She was wearing panties but no bra. I was used to that because she was always wandering around in the buff, partly, I suspect, because she knew it gave me a boner. Still, I wasn't complaining because Helen has beautiful big tits that I could never tire of ogling, with perky brown nipples that begged to be sucked.

"Well, I'm sorry the show got interrupted," she said with a wicked grin. I affected a look of surprise. Helen smiled naughtily and went on, "Oh come on Matt, don't look so shocked. There's a mirror above my bed remember? I saw you watching us. I'm not bothered; in fact it's quite exciting and it certainly seemed to give you a fucking massive boner."

"What do you expect?" I said nervously.

"No, you misunderstand," Helen grinned, "I said 'fucking massive'. Matt, your cock is huge, it's a bloody porno cock and you're only sixteen! God, I'd much rather have had that monster up me than the pathetic specimen I was getting a few minutes ago."

"Really?" My head started to spin, my gorgeous sister was basically saying she wanted me to fuck her!

"Yes, really," she said, "That is one hell of a prick. I've got friends who would fight each other to get rogered by that. Honestly, Matt, how many girls have you fucked"

"Two," I replied. I had just split up with my second ever girlfriend.

"And neither of them told you that you're hung like a bull?"

"Nope." It was true. Neither had, and the only other erect cocks I'd seen were in porn films and all the blokes a well-hung in those.

"Well, take it from me, you are," Helen said. "So I take it you enjoyed watching me getting fucked up the bum?"

"Fuck yes! It looked amazing."

"And you weren't shocked?"

"A bit I suppose," I hesitated, "Um, do you, you know, um, like it?"

Helen laughed, "Matt, I LOVE it! Nothing beats the pleasure of having a guy slide his huge greasy cock up my shitter and buggering me until I come and he shoots his jism into my turds. Sadly for me though, most guys I meet think it's disgusting, as you just saw. But then it's not always that dirty."

"Fucking hell Helen," I said without thinking, "If I was your boyfriend, I'd fuck your arse whenever you wanted."

"That's sweet," she smiled and leant forward to kiss my cheek. I felt her hot breath on my cheek and her lips lingered, her firm tit brushing my arm. Then slowly she moved her head and sought out my mouth. I don't remember the exact sequence of events, but the next thing I was aware of was French-kissing my sister and feeling her hand grip my shaft.

I'd fantasised about this thousands of times, but it felt wrong. I broke off the kiss and started to speak. Helen stopped me, squeezing my cock harder.

"Ssshhh," she whispered, slowly jacking my prick, "We're both horny and need to come. Just go with it and see what happens." And with that she kissed me again, her firm breasts pressed against my chest. Then kneeling before me, Helen lowered her head and kissed the tip of my rampant erection, suddenly engulfing my swollen bell-end in her mouth. She swirled her tongue around the rim of my glans and then took more of my circumcised pole into her mouth, licking the shaft and probing my piss-slit with her tongue. With a skill I had never seen before, she licked up and down the length of my tool, then licked my pendulous, sweaty balls After several more minutes of sublime cock-sucking, Helen licked my bollocks again and then she did something that shocked me. She ran her tongue down my crack and began to lick my arsehole! I drew my knees back to give her better access and she fell on my shithole with gusto, hungrily lapping at my hairy ring. It was quite unlike any experience I had ever had and the dirtiness of it thrilled me. When she returned to sucking my cock I was almost disappointed. Now she was sucking me with a new urgency and gently fingering my arsehole. Within a couple of minutes I felt my balls stir.

"Helen, I think I'm going to..." I stammered.

"I know," she said, taking her mouth from my prick to speak but continuing to slowly wank me, "I want it in my mouth."

That was about all it took, and immediately I felt my cock jerk and I pumped a hefty load of pent-up jizz into my sister's mouth. I remembered the first time I had come into a girl's mouth, about a year earlier. She had spat it out, grimaced and started choking like she'd drunk bleach. But here was my sister with a serene look on her face, her eyes closed and her hand lightly caressing her tits as she savoured my sperm and felt it slip down her throat. Fuck, she was horny.

She opened her eyes and jumped off the bed, telling me to wait. For a moment I was worried that she'd got cold feet and was running away, but a few seconds later she was back again, brandishing a rather large tube of something.

"What's that?" I asked, immediately regretting that I had shown my lack of experience in matters sexual.

"It's lube," she smiled, "To make your big cock nice and slippery so you can get it up my tight bottom."

"But Helen," I whined, "I've only just come."

"I know," she replied, "So I'll just have to make you big and hard again. Now what would do that?"

"Um, well, perhaps if you, um..." I couldn't get the words out.

"Come on, don't be shy," she teased, "Just tell me what I can do to make you hard enough to bugger me."

Actually, simply hearing her talk like that was making my cock stir, but I had other ideas.

"I think I'd like to watch you masturbate," I said. It has always been my fantasy to watch a girl frigging her pussy

"My pleasure," she said, "Literally." And with that she pealed down her knickers and settled back at the end of my bed and slowly spread her beautiful, long legs. I'd caught glimpses of Helen's fanny before and I knew she didn't shave, but now I had the opportunity to gaze at her privates with undisguised lust. Her pussy was perfect: not a tight slit of a bald quim so favoured by porno producers, but a big, beefy, bushy CUNT. She slipped her fingers through the forest of pubic hair that covered her mons and spread her piss-flaps and I saw the glistening wetness of her arousal.

"Do you like pussy Matt?" she cooed as she slowly frigged herself, "Can you see how wet I am, how horny and excited my cunt is?"

"Fuck, Helen," I panted, my cock once again at full mast, "It's perfect, so hairy and beautiful."

"So you like girls with bushy pussies then Matt?" she said, running her fingers through the broad triangle of her pubes.

"Shit yes!" I replied, "God, Helen I want to eat you so bad."

"Later Matt," she said softly, "You can eat me whenever you want, but now I want to show you how I pleasure myself. I want you to see how I stroke my furry pussy like this, spreading the lips and slipping my fingers inside. Then how I stroke my clit, mmmm, and pinch my nipples, feeling how big and hard they are, wishing I had two men here to suck on them while I wank, sucking and biting my big titties while I frig my cunt. Then they'd both fuck me, one up my cunt and the other up my arse, two huge greasy dicks fucking me, filling my fanny and my shitter, making me come. Oh fuck, I want you to see what a slut I am; a hot, randy slut. Then when I've been fucked I like being pissed on. I bet that shocks you doesn't it Matt? I bet you're shocked that even a slut like me gets off on having a couple of fit blokes wazz all over me, soaking me with their hot piss; pissing over my jugs, then my face, then my cunny, soaking my bush, making me drink their spunk and their piss."

"No, I'm not shocked," I gasped, "I think that sounds fucking horny." In truth I was slightly shocked. I knew my sister was a bit of a firecracker in the sack but I never imagined that she would be this dirty; as dirty as me in fact.

"And if I'm really horny," she went on, really churning her fingers in her slurping cunt, "I might use on of my dildos, fucking it into my horny cunt while I finger my bottom. And then when it's nice and slippery I'll push it up my bum and sodomise myself with it. God, sometimes that makes me come so hard my cunt squirts."

"Bloody hell Helen, you really do love it up the arse don't you?"

"Too fucking right," she panted, fingering her brownie for emphasis, "Nothing makes me come harder than getting my fudge-packed. In fact, I could do with a buggering right now. How's that boner taking shape little brother?"

I stopped wanking and gripped the base of my very stiff cock, letting it pulse in my hand.

"Looks fine to me," she said, licking her lips and tossing me the tube of lube. "Now make sure you use a lot of lube 'cos I've never taken one that massive up the chuff before."

I couldn't believe it: she hadn't been lying when she said I was hung! Feeling rather proud I proceeded to massage a generous dollop of lube into my dick-meat while Helen got on all fours in front of me. Lowering her chest to the bed, she reached behind and spread her buttocks, and what I saw stopped me in my tracks. There, bared before me, for my pleasure, was my sister's delicious butthole. Like her cunt, her anus wasn't the usual tight pinky possessed by the models in girlie mags, but a luscious, pouting brown ring of crinkled muscle. I had to taste her there, had to savour the forbidden tang of her rudely bared shithole. I pushed my face between her buttocks and kissed her there.

"Matt!" she said shakily, "I might be dirty there."

"I don't care," I told her, coming up for air, the flavour of her butt filling my mouth and its scent making my head spin, "I've just got to taste your beautiful arsehole Helen. You can shit in my mouth for all I care, just let me rim you."

"Oh you dirty cunt, Matt," Helen moaned as I returned to licking her ringpiece, my tongue swirling around the puckered orifice I was about to penetrate. "Lick my arsehole you horny fucker, lick me where I shit."

The thought was electrifying. This was the hole that my sister used for shitting, and I was French-kissing it! My mind was filled with a picture of Helen defecating, her anus stretching to allow a hefty log of shit splash into the water beneath. It should have been disgusting, but it just turned me on all the more. I'd never rimmed anyone before, but unlike eating pussy it seemed to come naturally. I would swirl my tongue around the knot of her anus, then probe the core with the tip of my tongue, desperate to gain entry to her rectum, then swipe the whole of her anal area with the flat of my tongue. With each round I seemed to be getting more of my tongue into the hot centre of her shitting hole and I suddenly tasted something tartly bitter. I realised with a rush of adrenaline that I was actually tasting my gorgeous sister's shit.

"Fuck Matt, oh fuck!" Helen gasped as I rimmed her butthole and she frigged her slippery cunt. "You're so fucking good at this. I've never been rimmed so good in my life. Oh yes! Yes! That's it, lick my arsehole, let me feel your tongue right inside my bottom, up my horny shitter. Oh wow, suck my hole Matt, taste my fucking hot turds you horny bastard. Oh yes, fuck Matt, you're making me come! Oh damn, fuck, shit, Matt please.... please... you have to bugger me."

Reluctantly tearing my tongue from her anus, but excited at the prospect of having unnatural intercourse with my sister, I knelt behind her and pressed my greasy helmet against the glistening ring of her shithole. I suddenly realised that I had no idea how to proceed. In porn movies the guys tend to ram their cocks right up girls' jacksies, but I assumed that was not very realistic. Fortunately Helen was so horny for my dick up her dumper that she made all the running. Gently at first, she began to push her backside back onto my dick, until my bell-end popped into her arse and she moaned softly, allowing her sphincter become accustomed to my prick. Panting that I was really big and stretching her hole so wide she slowly pushed back onto my tool, taking more and more of her shaft into her bowels. The sensation of her tight ring sliding gradually down my painfully hard cock was amazing and pretty soon I could feel her quoit clamped tightly around the very base of it, my pubes tickling her voluptuous buttocks.

"Now bugger me," she begged and I started to thrust into her hot passage. "Oh fuck Matt! You're so fucking huge, it's like being sodomised with a truncheon. Oh fucking hell, that's so good, my shitter's so full; I know I'm going to come so hard. Oh yeh, fuck my arse and fuck it hard you big-cocked stud. Damn, I love being buggered so much."

It felt fantastic, far better than any pussy. The tight ring of Helen's anus was squeezing my cock as it pistoned in and out of her humid bottom and the walls of her rectum were massaging every inch of my prick as I buggered her. God, even the word itself was thrilling: I was buggering my own sister, cornholing her, sodomising her, packing her fudge, and it was the best feeling in the world. Helen began to thrust her buttocks back into my groin, a sign that she needed to be butt-fucked harder I was happy to oblige, but I wanted to fuck her in a different position.

"Lie on your back Helen," I panted between thrusts, "I want to see your cunt and tits while I bugger you."

I pulled my prick from her clasping bottom, noting that it was now liberally greased with Helen's churned-up poop. Seeing it as she shifted onto her back she giggled and said it served me right for wanting to fuck her turd-tube instead of her pussy. She pulled her knees back and I gazed in lust at her hairy cunt and her huge, stiff-nippled tits and momentarily hesitated, wondering if I should lick her fanny before resuming my fevered pummelling of her shitter.

"Come on Matt," she pleaded, twanging her clit, "Bugger me some more, ram that huge cock up my dirt-box and give it to me."

I did as she asked in a single stroke and was rewarded my a lewd, gurgling fart. My cock had got things moving in Helen's bum and I could feel the tip of my rigid prick sinking into a large, warm turd as I buggered her and the thrill of actually fucking into her shit seemed to make my cock swell even more.

"Fuck, Helen," I panted and I ram-fuced her chute, "I can feel the shit up your arse."

"Does it feel good?" Helen asked breathlessly.

"Does it ever!" I moaned, fucking her as hard as I could, slamming my big teenage prick into my sister's shitty cavern "Helen, it's fantastic. Fucking your dirty shithole, punching a dent in that hot turd. Oh man!"

Suddenly, Helen threw her head back and rammed her tight butt down to the root of my dick, her breathing became ragged and her body went into spasm as she started to come, babbling incoherently as I dicked her shitter in short, hard thrusts. I felt something wet on my chest and looking down I saw to my delight that clear, viscous fluid was squirting from her hairy cunt as she orgasmed.

"Oh fuck Matt!" she gasped, "You're making me come so hard. It's so fucking good. Oh my God, you're making me come in my arse!"

I had really churned up her the contents of her bottom and I felt her hot, fudgey shit all around my cock, each thrust dragging some out to coat my hairy balls.

"Matt, sorry," she whined, "I really need to go to the toilet or I'm going to make a mess."

"Better get you to the bathroom then," I chucked as I pulled out of her arse and flipped her over, stuffing my sausage up her shitty butthole once more. Then I slipped my arms under her thighs and lifted her upwards so that she was sitting on my dick, and I walked into the bathroom, pausing infront of the mirror so Helen could see how her crap had been squeezed out of her plundered rectum to coat my bollocks. Then I put her down, my cock still up her shit-chute, so that her feet were either side of the toilet bowl and I resumed my fevered buggery of her tail pipe.

"I'm going to come," I whispered in her ear, gripping her bouncing baps and pinching her chunky nipples as I sodomised her shit-packed, slurping bottom. "Going to shoot my jizz into your filthy turds, bitch."

With a final brutal thrust into Helen's shitter I started to come. My ejaculation was so powerful it felt like I was pissing spunk into Helen's bowels, pinching her nips hard and triggering another orgasm which gripped her shagged-out body as I emptied my balls into my lovely sister.

As the last spurts died away, I pulled my softening, crap-covered tool from Helen's bottom and watched in amazement as she voided her bowels, a couple of sloppy stools dropping into the pan, followed by a gob of shit-stained sperm, and finally a firm, glistening turd. When she had finished shitting, I noticed that her butthole was still gaping from the buggering I had given her, and remembering something she'd said earlier, I began to piss, directing the hissing jet into her open arsehole. Helen sighed contentedly as my piss filled her rectum and began to overflow into the toilet, then swivelling round, she sat on the bowl and squirted the hot piss from her shitter and lifted her tits to be soaked by my urine. As I flicked the last drops from my flaccid cock I knelt in front of Helen and kissed her wet, salty tits before seeking out her mouth and kissing her hotly as I reached beneath her buttocks and gently massaged the rim of her still lewdly gaping arsehole.

"I've never come like that," she panted, breaking off the kiss and stroking my face.

"Phew, Helen. Neither have I, believe me."

"And you didn't mind it was dirty?"

"Fuck no! I want to get dirtier and dirtier, Helen."

"Then, we're going to have lots of fun, Matt," she said, smiling wickedly, "Lots of hot, dirty fun."

My friends would think I was crazy if I told them, but I guess I just have different tastes in pussy to them. I'm 17, so I'm supposed to be obsessed by pussy, and I'm tall, blond and goodlooking so I get a fair amount of it, but somehow it doesn't quite hit the mark. I'd seen what I want in one of my Dad's tattered pornos: there's a picture of this big-titted bird looking serene with a huge cock stuffed up her arse, which is horny enough in itself, but her cunt... wow! Her cunt is just perfect; fat, succulent lips and covered with thick curly hair. I knew that if I found a girl like that I'd go down on her for ever.

Actually I'm not sure why I'm so obsessed with girls' pussies because if I'm honest it's their bums which really enthrall me. I like a big, jutting pair of jugs as much as the next man, but when I check girls out it's always their butts that I concentrate on. I like big, curvy cheeks, not tight little botties like Kate Moss's, but most of all it's what lurks between those wobbling buns that makes me hard: a girl's arsehole. Nothing enthralls me like the tightly crinkled knot of pinky-brown flesh that guards the exit of a girl's shit-pipe.

My butt obsession I blame upon my sister. She's two years older than me and in every way my perfect woman, but unfortunately, my sister. About a year ago I saw her and some bloke she'd met in a club having sex. Our parents both work in Saudi so Helen and I were sent to England to finish school, and although our uncle looks in now and again we're basically on our own. Helen is a bit of a nympho and is always bringing blokes back to shag, but on this occasion she didn't shut the door. Usually I would lie on my bed and wank like crazy as I listened to Helen being humped in the next room and imagined the scene: Helen stark naked, her big tits bouncing as she straddled some bloke and rammed her slippery cunt up and down his rod. When I ejaculated I would pretend I was coming into her mouth or over her baps, but most often I would imagine that I was shooting my jism up her bottom. In actual fact I assumed back then that anal sex was something that only pornstars did, but it was nice to fantasise.

On this occasion I peered round the door-frame and actually saw what I had imagined so many times: Helen on all fours, panting and moaning as this bloke fucked her from behind. They both had their backs to me so couldn't see me, and what happened next pretty much made me come in my pants. Between her groans of delight, Helen panted urgently to her lover, "Fuck me up the arse." The guy fucking her stopped thrusting and spread Helen's cheeks. Then lowering his face into her crack, he began to lick my sister's arsehole while she moaned and told him how good it felt. Then rubbing some gel onto his knob he aimed it at Helen's puckered anus and lunged forward into her bowels. She cried out in pain and told him to go gently but he just laughed and slapped her arse, calling her a dirty slut. I felt a sudden surge of anger against him and a desire to protect my sister, but of course the guy had a point; Helen was being sodomised by a bloke she'd only just met and was loving every minute of it. I took my prick out of my trousers and began to masturbate as I watched Helen getting buggered, watching the guy's muscular buttocks flex as he rammed his dick into Helen's rectum, imagining how fantastic it would be to feel the tight ring of her anus shuttling up and down my shaft. I wasn't far off coming but suddenly it all stopped.

"Your dirty, disgusting bitch!" the bloke yelled, pulling his prick from Helen's shit-chute with an audible plop, "I've got your shit all over my cock you filthy whore!" Helen just giggled and asked him what he expected to find up a girl's arse, diamonds perhaps. But the guy was in no mood for humour. He wiped his prick on Helen's panties and as I retreated into my bedroom I heard him run down the stairs and leave the house, slamming the front door. I stripped naked and lay back on my bed, jacking off furiously as I fantasised about fucking my sister's shapely behind. I had fantasised about that many times before, but now the fantasy had an added kink: now I was thinking about fucking Helen's shitty bottom.

I was again close to coming when I heard a soft tap on my door. I quickly threw the duvet over my naked and aroused body and told Helen to come in. I knew it would be her as there was no one else in the house. She came in and sat on my bed. She was wearing panties but no bra. I was used to that because she was always wandering around in the buff, partly, I suspect, because she knew it gave me a boner. Still, I wasn't complaining because Helen has beautiful big tits that I could never tire of ogling, with perky brown nipples that begged to be sucked.

"Well, I'm sorry the show got interrupted," she said with a wicked grin. I affected a look of surprise. Helen smiled naughtily and went on, "Oh come on Matt, don't look so shocked. There's a mirror above my bed remember? I saw you watching us. I'm not bothered; in fact it's quite exciting and it certainly seemed to give you a fucking massive boner."

"What do you expect?" I said nervously.

"No, you misunderstand," Helen grinned, "I said 'fucking massive'. Matt, your cock is huge, it's a bloody porno cock and you're only sixteen! God, I'd much rather have had that monster up me than the pathetic specimen I was getting a few minutes ago."

"Really?" My head started to spin, my gorgeous sister was basically saying she wanted me to fuck her!

"Yes, really," she said, "That is one hell of a prick. I've got friends who would fight each other to get rogered by that. Honestly, Matt, how many girls have you fucked"

"Two," I replied. I had just split up with my second ever girlfriend.

"And neither of them told you that you're hung like a bull?"

"Nope." It was true. Neither had, and the only other erect cocks I'd seen were in porn films and all the blokes a well-hung in those.

"Well, take it from me, you are," Helen said. "So I take it you enjoyed watching me getting fucked up the bum?"

"Fuck yes! It looked amazing."

"And you weren't shocked?"

"A bit I suppose," I hesitated, "Um, do you, you know, um, like it?"

Helen laughed, "Matt, I LOVE it! Nothing beats the pleasure of having a guy slide his huge greasy cock up my shitter and buggering me until I come and he shoots his jism into my turds. Sadly for me though, most guys I meet think it's disgusting, as you just saw. But then it's not always that dirty."

"Fucking hell Helen," I said without thinking, "If I was your boyfriend, I'd fuck your arse whenever you wanted."

"That's sweet," she smiled and leant forward to kiss my cheek. I felt her hot breath on my cheek and her lips lingered, her firm tit brushing my arm. Then slowly she moved her head and sought out my mouth. I don't remember the exact sequence of events, but the next thing I was aware of was French-kissing my sister and feeling her hand grip my shaft.

I'd fantasised about this thousands of times, but it felt wrong. I broke off the kiss and started to speak. Helen stopped me, squeezing my cock harder.

"Ssshhh," she whispered, slowly jacking my prick, "We're both horny and need to come. Just go with it and see what happens." And with that she kissed me again, her firm breasts pressed against my chest. Then kneeling before me, Helen lowered her head and kissed the tip of my rampant erection, suddenly engulfing my swollen bell-end in her mouth. She swirled her tongue around the rim of my glans and then took more of my circumcised pole into her mouth, licking the shaft and probing my piss-slit with her tongue. With a skill I had never seen before, she licked up and down the length of my tool, then licked my pendulous, sweaty balls After several more minutes of sublime cock-sucking, Helen licked my bollocks again and then she did something that shocked me. She ran her tongue down my crack and began to lick my arsehole! I drew my knees back to give her better access and she fell on my shithole with gusto, hungrily lapping at my hairy ring. It was quite unlike any experience I had ever had and the dirtiness of it thrilled me. When she returned to sucking my cock I was almost disappointed. Now she was sucking me with a new urgency and gently fingering my arsehole. Within a couple of minutes I felt my balls stir.

"Helen, I think I'm going to..." I stammered.

"I know," she said, taking her mouth from my prick to speak but continuing to slowly wank me, "I want it in my mouth."

That was about all it took, and immediately I felt my cock jerk and I pumped a hefty load of pent-up jizz into my sister's mouth. I remembered the first time I had come into a girl's mouth, about a year earlier. She had spat it out, grimaced and started choking like she'd drunk bleach. But here was my sister with a serene look on her face, her eyes closed and her hand lightly caressing her tits as she savoured my sperm and felt it slip down her throat. Fuck, she was horny.

She opened her eyes and jumped off the bed, telling me to wait. For a moment I was worried that she'd got cold feet and was running away, but a few seconds later she was back again, brandishing a rather large tube of something.

"What's that?" I asked, immediately regretting that I had shown my lack of experience in matters sexual.

"It's lube," she smiled, "To make your big cock nice and slippery so you can get it up my tight bottom."

"But Helen," I whined, "I've only just come."

"I know," she replied, "So I'll just have to make you big and hard again. Now what would do that?"

"Um, well, perhaps if you, um..." I couldn't get the words out.

"Come on, don't be shy," she teased, "Just tell me what I can do to make you hard enough to bugger me."

Actually, simply hearing her talk like that was making my cock stir, but I had other ideas.

"I think I'd like to watch you masturbate," I said. It has always been my fantasy to watch a girl frigging her pussy

"My pleasure," she said, "Literally." And with that she pealed down her knickers and settled back at the end of my bed and slowly spread her beautiful, long legs. I'd caught glimpses of Helen's fanny before and I knew she didn't shave, but now I had the opportunity to gaze at her privates with undisguised lust. Her pussy was perfect: not a tight slit of a bald quim so favoured by porno producers, but a big, beefy, bushy CUNT. She slipped her fingers through the forest of pubic hair that covered her mons and spread her piss-flaps and I saw the glistening wetness of her arousal.

"Do you like pussy Matt?" she cooed as she slowly frigged herself, "Can you see how wet I am, how horny and excited my cunt is?"

"Fuck, Helen," I panted, my cock once again at full mast, "It's perfect, so hairy and beautiful."

"So you like girls with bushy pussies then Matt?" she said, running her fingers through the broad triangle of her pubes.

"Shit yes!" I replied, "God, Helen I want to eat you so bad."

"Later Matt," she said softly, "You can eat me whenever you want, but now I want to show you how I pleasure myself. I want you to see how I stroke my furry pussy like this, spreading the lips and slipping my fingers inside. Then how I stroke my clit, mmmm, and pinch my nipples, feeling how big and hard they are, wishing I had two men here to suck on them while I wank, sucking and biting my big titties while I frig my cunt. Then they'd both fuck me, one up my cunt and the other up my arse, two huge greasy dicks fucking me, filling my fanny and my shitter, making me come. Oh fuck, I want you to see what a slut I am; a hot, randy slut. Then when I've been fucked I like being pissed on. I bet that shocks you doesn't it Matt? I bet you're shocked that even a slut like me gets off on having a couple of fit blokes wazz all over me, soaking me with their hot piss; pissing over my jugs, then my face, then my cunny, soaking my bush, making me drink their spunk and their piss."

"No, I'm not shocked," I gasped, "I think that sounds fucking horny." In truth I was slightly shocked. I knew my sister was a bit of a firecracker in the sack but I never imagined that she would be this dirty; as dirty as me in fact.

"And if I'm really horny," she went on, really churning her fingers in her slurping cunt, "I might use on of my dildos, fucking it into my horny cunt while I finger my bottom. And then when it's nice and slippery I'll push it up my bum and sodomise myself with it. God, sometimes that makes me come so hard my cunt squirts."

"Bloody hell Helen, you really do love it up the arse don't you?"

"Too fucking right," she panted, fingering her brownie for emphasis, "Nothing makes me come harder than getting my fudge-packed. In fact, I could do with a buggering right now. How's that boner taking shape little brother?"

I stopped wanking and gripped the base of my very stiff cock, letting it pulse in my hand.

"Looks fine to me," she said, licking her lips and tossing me the tube of lube. "Now make sure you use a lot of lube 'cos I've never taken one that massive up the chuff before."

I couldn't believe it: she hadn't been lying when she said I was hung! Feeling rather proud I proceeded to massage a generous dollop of lube into my dick-meat while Helen got on all fours in front of me. Lowering her chest to the bed, she reached behind and spread her buttocks, and what I saw stopped me in my tracks. There, bared before me, for my pleasure, was my sister's delicious butthole. Like her cunt, her anus wasn't the usual tight pinky possessed by the models in girlie mags, but a luscious, pouting brown ring of crinkled muscle. I had to taste her there, had to savour the forbidden tang of her rudely bared shithole. I pushed my face between her buttocks and kissed her there.

"Matt!" she said shakily, "I might be dirty there."

"I don't care," I told her, coming up for air, the flavour of her butt filling my mouth and its scent making my head spin, "I've just got to taste your beautiful arsehole Helen. You can shit in my mouth for all I care, just let me rim you."

"Oh you dirty cunt, Matt," Helen moaned as I returned to licking her ringpiece, my tongue swirling around the puckered orifice I was about to penetrate. "Lick my arsehole you horny fucker, lick me where I shit."

The thought was electrifying. This was the hole that my sister used for shitting, and I was French-kissing it! My mind was filled with a picture of Helen defecating, her anus stretching to allow a hefty log of shit splash into the water beneath. It should have been disgusting, but it just turned me on all the more. I'd never rimmed anyone before, but unlike eating pussy it seemed to come naturally. I would swirl my tongue around the knot of her anus, then probe the core with the tip of my tongue, desperate to gain entry to her rectum, then swipe the whole of her anal area with the flat of my tongue. With each round I seemed to be getting more of my tongue into the hot centre of her shitting hole and I suddenly tasted something tartly bitter. I realised with a rush of adrenaline that I was actually tasting my gorgeous sister's shit.

"Fuck Matt, oh fuck!" Helen gasped as I rimmed her butthole and she frigged her slippery cunt. "You're so fucking good at this. I've never been rimmed so good in my life. Oh yes! Yes! That's it, lick my arsehole, let me feel your tongue right inside my bottom, up my horny shitter. Oh wow, suck my hole Matt, taste my fucking hot turds you horny bastard. Oh yes, fuck Matt, you're making me come! Oh damn, fuck, shit, Matt please.... please... you have to bugger me."

Reluctantly tearing my tongue from her anus, but excited at the prospect of having unnatural intercourse with my sister, I knelt behind her and pressed my greasy helmet against the glistening ring of her shithole. I suddenly realised that I had no idea how to proceed. In porn movies the guys tend to ram their cocks right up girls' jacksies, but I assumed that was not very realistic. Fortunately Helen was so horny for my dick up her dumper that she made all the running. Gently at first, she began to push her backside back onto my dick, until my bell-end popped into her arse and she moaned softly, allowing her sphincter become accustomed to my prick. Panting that I was really big and stretching her hole so wide she slowly pushed back onto my tool, taking more and more of her shaft into her bowels. The sensation of her tight ring sliding gradually down my painfully hard cock was amazing and pretty soon I could feel her quoit clamped tightly around the very base of it, my pubes tickling her voluptuous buttocks.

"Now bugger me," she begged and I started to thrust into her hot passage. "Oh fuck Matt! You're so fucking huge, it's like being sodomised with a truncheon. Oh fucking hell, that's so good, my shitter's so full; I know I'm going to come so hard. Oh yeh, fuck my arse and fuck it hard you big-cocked stud. Damn, I love being buggered so much."

It felt fantastic, far better than any pussy. The tight ring of Helen's anus was squeezing my cock as it pistoned in and out of her humid bottom and the walls of her rectum were massaging every inch of my prick as I buggered her. God, even the word itself was thrilling: I was buggering my own sister, cornholing her, sodomising her, packing her fudge, and it was the best feeling in the world. Helen began to thrust her buttocks back into my groin, a sign that she needed to be butt-fucked harder I was happy to oblige, but I wanted to fuck her in a different position.

"Lie on your back Helen," I panted between thrusts, "I want to see your cunt and tits while I bugger you."

I pulled my prick from her clasping bottom, noting that it was now liberally greased with Helen's churned-up poop. Seeing it as she shifted onto her back she giggled and said it served me right for wanting to fuck her turd-tube instead of her pussy. She pulled her knees back and I gazed in lust at her hairy cunt and her huge, stiff-nippled tits and momentarily hesitated, wondering if I should lick her fanny before resuming my fevered pummelling of her shitter.

"Come on Matt," she pleaded, twanging her clit, "Bugger me some more, ram that huge cock up my dirt-box and give it to me."

I did as she asked in a single stroke and was rewarded my a lewd, gurgling fart. My cock had got things moving in Helen's bum and I could feel the tip of my rigid prick sinking into a large, warm turd as I buggered her and the thrill of actually fucking into her shit seemed to make my cock swell even more.

"Fuck, Helen," I panted and I ram-fuced her chute, "I can feel the shit up your arse."

"Does it feel good?" Helen asked breathlessly.

"Does it ever!" I moaned, fucking her as hard as I could, slamming my big teenage prick into my sister's shitty cavern "Helen, it's fantastic. Fucking your dirty shithole, punching a dent in that hot turd. Oh man!"

Suddenly, Helen threw her head back and rammed her tight butt down to the root of my dick, her breathing became ragged and her body went into spasm as she started to come, babbling incoherently as I dicked her shitter in short, hard thrusts. I felt something wet on my chest and looking down I saw to my delight that clear, viscous fluid was squirting from her hairy cunt as she orgasmed.

"Oh fuck Matt!" she gasped, "You're making me come so hard. It's so fucking good. Oh my God, you're making me come in my arse!"

I had really churned up her the contents of her bottom and I felt her hot, fudgey shit all around my cock, each thrust dragging some out to coat my hairy balls.

"Matt, sorry," she whined, "I really need to go to the toilet or I'm going to make a mess."

"Better get you to the bathroom then," I chucked as I pulled out of her arse and flipped her over, stuffing my sausage up her shitty butthole once more. Then I slipped my arms under her thighs and lifted her upwards so that she was sitting on my dick, and I walked into the bathroom, pausing infront of the mirror so Helen could see how her crap had been squeezed out of her plundered rectum to coat my bollocks. Then I put her down, my cock still up her shit-chute, so that her feet were either side of the toilet bowl and I resumed my fevered buggery of her tail pipe.

"I'm going to come," I whispered in her ear, gripping her bouncing baps and pinching her chunky nipples as I sodomised her shit-packed, slurping bottom. "Going to shoot my jizz into your filthy turds, bitch."

With a final brutal thrust into Helen's shitter I started to come. My ejaculation was so powerful it felt like I was pissing spunk into Helen's bowels, pinching her nips hard and triggering another orgasm which gripped her shagged-out body as I emptied my balls into my lovely sister.

As the last spurts died away, I pulled my softening, crap-covered tool from Helen's bottom and watched in amazement as she voided her bowels, a couple of sloppy stools dropping into the pan, followed by a gob of shit-stained sperm, and finally a firm, glistening turd. When she had finished shitting, I noticed that her butthole was still gaping from the buggering I had given her, and remembering something she'd said earlier, I began to piss, directing the hissing jet into her open arsehole. Helen sighed contentedly as my piss filled her rectum and began to overflow into the toilet, then swivelling round, she sat on the bowl and squirted the hot piss from her shitter and lifted her tits to be soaked by my urine. As I flicked the last drops from my flaccid cock I knelt in front of Helen and kissed her wet, salty tits before seeking out her mouth and kissing her hotly as I reached beneath her buttocks and gently massaged the rim of her still lewdly gaping arsehole.

"I've never come like that," she panted, breaking off the kiss and stroking my face.

"Phew, Helen. Neither have I, believe me."

"And you didn't mind it was dirty?"

"Fuck no! I want to get dirtier and dirtier, Helen."

"Then, we're going to have lots of fun, Matt," she said, smiling wickedly, "Lots of hot, dirty fun."