 
 
Katie shook her head and growled, slumping in defeat as she felt Tommy's sperm begin spurting wetly into her, "Damnit Tommy, I told you to let me know when you were close!"  She hissed, " Are you trying to make me pregnant?!"

The boy snorted, gripping his sister tight as he went on ejaculating, helpless now, "I'm sorry Sis..  I couldn't feel it and then suddenly," he gasped, "it just happened.  Oh Sis.."  He shuddered and gasped, squirting hard, feeling his semen splashing inside her.  They lay side by side on Katie's bed, tails up, the incestuous pair twitching and grunting as they mated like the very first time.  Tommy made a token effort to pull away, but Katie stopped him, gripping his arm and shaking her head fiercely.

"It's too late now, you may as well enjoy it," she sighed, resting her head down on the bed.  But it did feel good, she was forced to admit as she curled her toes and contemplated the bittersweet sensation of her brother climaxing inside her.  This was the first chance they'd had together since the holiday, she hadn't wanted to risk it till they were home alone this weekend.  Katie had told Tommy all about the risks, how his seed could make her pregnant with cubs.  He'd pestered for the past few weeks to mate with her anyway, after apologising for what happened in the car.  The truth was, she wanted it as much as him, but his pleading was too cute.  She eventually agreed, but not before insisting he pulled out before he squirted, that he let her know when he was close.  

And now here she was again, taking another unwitting roll of the dice as Tommy filled her up.  The weeks had taken their toll on him it seemed, he gasped and whimpered as he squirted again and again, more than she'd ever felt before.  It was like he'd been saving it all up, It was thicker too, Katie shuddered and wondered if this increased the chances of her finally succumbing to it.  She lay there and listened to him make his noises, felt every twitch of his penis inside her, she was more excited than she liked to admit.  He took a long time to stop, long after he stopped ejaculating, the aftershocks bouncing through his body like so many ripples on a pond.  When he finally did, Katie smiled as he licked at her neck and then lay his head down next to hers.  

She should have been more upset, but sometimes when she thought about it, the risks hardly even seemed real.  Katie listened to Tommy's breathing slowing down, his grip on her softening, just the odd twitch from him inside her now.  It was obvious after a few minutes that her brother had fallen asleep, a fact about males she would soon become all too familiar with.  But it was lunchtime and they couldn't just lay around dozing all day!  Besides, Katie had an idea.

"C'mon Tommy, you can't sleep like this, wake up!"  She wriggled gently, not wanting to just twist out of his paws, just enough to jostle him.  Tommy moaned and nestled against her, she wriggled again, this time bringing her arms round to stroke gently along his sides.  

Tommy giggled and gripped her arms clumsily, obviously ticklish, "Okay okay I'm awake..  Just.. give me a minute."

Katie rolled her eyes and eventually nodded, "Well..  I guess it wont hurt."  He was shrinking in her, she could feel it, the shifting sensation quite exquisite.  Tommy licked and nuzzled at her neck as well, unmistakably affectionate, what was with him today?  Eventually, wetly, he slipped out and reluctantly broke the embrace, rolling over onto his back on one side of the bed.  Katie rolled over and lay on her back next to him, panting lightly, she couldn't help reaching a paw down and checking herself.  Glancing at her brother, she slipped a finger in easily, gasping as she felt her vagina slick with seed.

Looking at him now, a naughty smile formed on her lips, "Okay Tommy, you gotta help me with this.  I told you not to put it in me, so now you gotta get it out of me.

Tommy seemed confused, babbling sleepily, "Wha?  I gotta take what out of you?  Didn't I just.."

"No, silly!  Look," she took one of his paws, turned it round and then pushed one of his fingers right into her slit, "Feel it now?"

He gasped and made to pull his paw away, but then stopped, sitting up a little and looking.  Once more he had his paw in his sister's vagina, and he'd made a mess of it alright, "Oh..  Umm.."  After thinking about it for a moment, the boy inserted a second finger and began trying to scoop out some of his seed.

She shivered and bit her lip, shaking her head and putting her paw over his, "That's no good.  You need to, umm.." she blushed, "You're gonna have to, well," Katie shook her head and then cupped one paw into a loose fist, before licking her tongue into the crevice her fingers made.

Tommy recoiled briefly and made a face, and she glared at him, "Hey!  You weren't complaining when I sucked your willy!" She blurted out, then immediately regretted it, blushing deeply and looking away.

He didn't seem to notice, as he thought hard for a moment and then nodded reluctantly when she looked back, much to her surprise.  She was right.  In fact, considering all that they'd done, it didn't sound bad at all.  Tommy sat up and pulled his paw back, staring at his sticky fingers for a long while.  Why not, he thought, and popped them into his mouth, licking them clean.  There was no mistaking the sweet taste of his sister, but the taste was also of him, yet it seemed like he'd experienced it before.  Not like this though, it was hard to describe, as much about the slippery texture than the taste.  He swallowed and was about to become a great deal more familiar with it, looking down at Katie beside him.  Her eyes were half closed and she lay there with her arms by her head, on her back, slender legs spread open a little.  She was completely nude, like he was, Tommy blushed suddenly as he traced rosettes down her pale yellow belly until he was looking where her legs met.

It was still hard to believe that's where his penis was meant to go, where it had gone and where he very much hoped to put it in the future.  But nothing could deny the fact right now, her slit was still spread a little from their mating.  His very own semen clung to the edges of it and it made them wet and shiny where his paw had been, standing out in stark white relief.  And now he had to put his muzzle there, the thought gave him a little shiver of excitement and fear.  Tommy paused, and then got up onto his hands and knees, crawling down the bed with his tail swaying.  He glanced and saw Katie looking at his rump, blushed and turned around, eventually sitting down on his heels by her feet.

There was nowhere else to look now, she lay there serenely as Tommy's eyes darted nervously over her, hesitant about taking the next step.  Finally Katie looked away herself, a little flushed at the attention of her brother.   The bed wasn't long enough for him to crouch as he needed to by her feet, and so Tommy slipped off the end, heart suddenly hammering in his chest.  He turned around, took a deep breath and her scent hit him, inviting him, drawing his muzzle inexorably to her.  Tommy swallowed, holding out a moment longer, and then he crouched down between Katie's legs and leant forward onto the bed.  His forearms bumped against them and she spread them wider, much to his chagrin, revealing everything to him.  Tommy was so close, he shivered, settling onto his elbows and gently tucking Katie's tail to one side.

He glanced up and she was looking, now, a mixture of curiosity, excitement and shyness across her muzzle.  His view slid back down and there it was, closer than he'd ever seen it, puffy, pink and furless.  Somehow it seemed too small, too tight to ever take anything inside it, least of all his penis, but the evidence was right in front of him and now he had to clean it up.  With no more delays, the cub gave a little shiver, dropped his head down and began licking his sister between her legs.  She squealed immediately, even at his halting tongue strokes, gripping him with her legs and beginning to pant softly.  Her taste flooded his muzzle and he started licking her again and again with broad strokes of his tongue, immediately consumed.  Every texture of her slit could be felt, every bump and crevice, and if Tommy pressed a little harder, he felt his tongue slipping into it too.  Katie whimpered then, she was starting to move beneath him and he pushed more, on the verge of slipping into her vagina.

Tommy was beginning to taste his own semen quite strongly, when Katie suddenly gripped his head, gasping, "Stop!"

Confused, Tommy withdrew and shook his head, staring at her with his muzzle open.  But she wasn't looking, Katie had rolled over and was quickly up on all fours in front of him.  He gulped and watched as she crawled up the bed to make room, crouched down a little and then lifted her tail up, flipping it over her back.  The strongest sense of deja-vu gripped the boy and it was all he could do not to mount her there and then.  But she didn't say anything, just watched him over her shoulder with a hungry expression on her face.  Tommy shook his head, climbed up onto the bed and with no further ado stuck his muzzle under her tail.

His nose bumped against her sensitive tailhole, she gasped, then Tommy licked her smoothly from front to back.  He took no care where his tongue went and suddenly every scent, every flavour of hers was his to experience.  He licked again, big wide tongue bathing her from the top of her slit to the base of her tail.  It was intoxicating and not at all bad, she'd already showered that morning and Tommy found himself unable to resist pausing and lapping briefly over that smooth skin.  She cried out then, gasping and fighting for breath, but he moved on, drawn back to her slit.  He crouched a little lower, then angled his head upwards as he began to properly lick his sister.  Immediately Tommy could taste his semen again, it was slowly leaking now while his tongue began to cleft her vagina.  Katie groaned, spread her legs a little wider for him, and he pushed.  With no fuss, Tommy breached her opening like a hand through a narrow letterbox,  suddenly slipping deep inside.

He groaned now, wriggling and probing, her most intimate fluids spreading through his mouth.  Not just hers, there was his, he could really feel the texture of it, salty and viscous, lining her vaginal.  Tommy blushed, there seemed to be a lot of it, and as he forced his tongue deeper it almost felt like a pool of the stuff.  Katie was shaking as she was reamed, giving little huffs and snorts, and then Tommy set about his duty.  He withdrew, swallowed, then wriggled back inside her again for another go.  It felt weird to be licking up his own mess, but it did taste interesting and there was certainly nothing bad about licking his sister.  Things got easier the more excited Katie got, and soon Tommy was scooping out his own warm seed in great thirsty mouthfuls , the very same he'd ejaculated not half an hour ago.  It was increasingly exciting and he found he wanted more, straining to lick deeper, find more thick rivulets clinging deep inside.  With that, Katie lost it and started to huff and pant, her hips moving up and down, a series of soft cries emanating from her muzzle.  Tommy made a funny noise and then withdrew wisely, watching with wide eyes as she convulsed in front of him, her body wracked with great spasms as the excitement proved too much.

He blushed again, he'd done this just by licking her, she seemed to be enjoying it even more than he was.  The cub crouched awkwardly and waited, unable to sit, his erection uncomfortably hard.  Finally she grew still once more, just panting and mewling, almost flat to the bed.  Tommy couldn't wait any longer and thrust his muzzle back under his sister's tail, much to her surprise.  Before she could even protest, he'd threaded his tongue deep into her vagina and was already probing urgently for more of his own semen.  Katie gasped and raised her rump up, giving him better access, any rebuke already forgotten.  Tommy grunted and pushed, getting as deep as he could, he could still taste it just out of reach.  There were traces her orgasm had caused to ooze lower, he licked and licked till they were all gone, but still he couldn't reach the last of it.  He growled, growing ever more excited, a childish logic suddenly entering the boy's head.  If he wanted more, he just had to put it there..

This thought drove every other one away and without hesitation, Tommy pulled out of his sister, mounted her on all fours and thrust his stiff penis straight up inside her with a lucky stroke.  Katie gasped and stared over her shoulder in shock, trying to meet her brother's eyes, but then he scruffed her.  It was a gentle bite on the loose skin at the back of her neck, but the effect was instant, the girl raised her rump higher, spread her back legs, responding on instinct now.  Tommy gave a soft growl and gripped her sides, giving slow shuddering thrusts, but with every one he pushed so hard.  Katie was forced to push back just as hard as he gripped the bed with his back claws, completing another thrust.  In this position his penis went deeper than it had ever before, they both felt it as he nudged firmly against her deepest recesses and his testicles pressed against her.  Tommy adjusted his back legs and crouched a little lower before thrusting again, a small groan escaped his muzzle and then he shivered all over.  He felt the same bottoming out, pressing even harder with legs straining, and Tommy knew it was about to happen.

She'd made him promise he would pull out if he felt it happening, explained all the risks, told him how much of a chance they'd taken already.  But then if they'd done it all those times now, and nothing had happened, maybe they were just too young?  Tommy's tail rose up and he shuddered deeply, completing one more slow thrust, breathing in sharply.  "Oh Katie.." he murmured, held onto her tight and prepared to ejaculate once again into his sister.  The pleasure washed over Tommy, he stiffened, legs trembling as fresh semen began rushing up his penis.  Then with flagging tail it started, warm sperm jetted out of his tip and kept coming in wet sticky pulses.  Actually nudging her cervix, his squirts had nowhere to go but against the tight orifice, testing the seal and oozing back out round the sides.

Tommy grunted and snorted, pushing harder, and they both gasped suddenly as he slipped even deeper.  With nowhere else to go, the leopard's penis pushed into her cervix and that was all it took, suddenly his ejaculation was oozing and then spraying into her womb.  Thick ropes of his fertile semen splashed against the walls, decorating it, until Tommy shifted and slipped back out of her slightly.  Neither was sure quite what had happened, but the moment passed and he shivered, Katie mewling under him as he dumped the rest of his seed deeply into her vagina.  She was trembling now, her breath coming in short gasps, and that's when Tommy realised he'd done it to her again.  While he finished his insemination, she started to climax, helpless to stop as the contractions began working their way through her body.

Katie whimpered, gasping out little cries, pleasure radiating through every part of her while Tommy was just twitching with aftershocks.  She felt his stiff penis so clearly, radiating warmth and wetness, her vagina was squeezing it purposefully.  Her uterus too, squeezed and contracted, drawing even more semen through her cervix and driving the rest upwards to where it belonged.  Tommy groaned and held her tight as his penis was massaged, it was almost too much as he came down from his own shattering release.  Deep inside Katie, by all the fates, her very first mature egg was well on its way to her womb.  Finally Katie collapsed flat onto the bed, her brother with her, and they like that for some time, gasping and panting.

She shivered, something had felt different that time, he'd never been that deep.  And damnit, he'd nailed her yet again, while she did nothing to stop him.  Did she want to get pregnant?  Katie waved away that idea, flustered, she'd just got caught up in the heat of the moment and hadn't even thought about it.  Besides, maybe they were too young for anything to happen, she'd not even had her first period, another fact the book had pointed out.  That had to be it, if something was gonna happen, surely it would have happened by now, why was she such a stress head?  A great weight lifted from her mind and she relaxed considerably, finally able to just enjoy it.  Afterall, isn't all of this what she'd wanted from her brother in the first place? 

From now on she'd let him have his fun..  But he didn't need to know just yet, did he?  She moaned softly as she felt her brother climbing off, slipping wetly out of her, and then a grin spread over her muzzle as she realised what was coming.  Katie shivered suddenly at the familiar feeling of Tommy's tongue licking wetly between her legs, starting to clean her up without asking.  "Good boy," she said, lifting her tail up and glancing over her shoulder at him, spreading her legs wider.  Tommy responded instantly by threading his tongue into her again, it went quickly as he slipped straight into the void left by their mating.  Katie moaned as it began once more, so intense, like a wriggling eel deep inside her.  She could feel him scooping out his own fresh semen like before, some of it ran out of her and leaked down her leg, she could hear him keep swallowing.  His muzzle pushed hard into her sensitive groin and he was straining, getting as deep as he could, flicking his tongue-tip against her vaginal walls.  She could tell he was enjoying it and not just from licking her, there was a real urgency, a real thirst to what he was doing.  Just as Katie feared she might have another crashing orgasm, Tommy finally stopped, pulling back and licking her up and down a few times before settling into an awkward crouch.

Katie moaned and flopped over onto her side, curling up and looking at her brother with grateful eyes.  Somewhere inside her, Tommy's sperm swam where it was supposed to and engulfed her egg.  He looked back at her, crouching, an expression of renewed need on his muzzle.  She looked down and rolled her eyes as she saw he still had an erection.  Unbelievable.  "Oh jeeze Tommy.  How did you even survive before we started with each other?  C'mon, lay down next to me," she patted the bed, "That's it, come lay next to your sister."  Tommy hesitantly obeyed, still eager for relief, but it had only been sparked by doing his duty again..  He lay down on his side next to her, then rolled onto his back when she nudged him.  Katie smiled and lay on her side looking at Tommy, his erection all shiny and wet, standing proud despite two mating with her.  She licked her lips, reached over and began masturbating her brother.

With a gentle grasp she rubbed him up and down, pushing his sheath far back each time, letting the sexual fluids keep things smooth.  Tommy shuddered and gave a guttural moan, hips rising up at her touch, closing his eyes and panting with excitement.  Katie switched paws and adjusted her position, bringing her free paw round to cup his balls, eliciting another moan while she stroked him.  It was the first time she'd actually done this simple thing and Katie licked her lips at the pleasing simplicity, it was wonderful to hold him like this.  She bent his penis forward, gently, angling it up higher from his tummy and exploring how it might make him feel.  A gurgling grunt spurred her on, she squeezed his soft testicles now, carefully, and started rubbing him faster.  His hips began to buck under her, thrusting his penis into the air, she kept up the pace and sucked in a breath, excited at what was about to happen.  

As Katie angled his penis as far up as she dared it began pulsing, Tommy gave a deep shudder and then with a gasp started ejaculating.  She watched with her mouth open as the first of many thin squirts jetted out of his penis and landed first on his chest, then his face.  She could feel every one of them through her paw as his penis surged, she saw it twitch and then she saw his semen rain down on him.  Some of it ran down his shaft too and over her paw, she chewed her lip and watched, scarcely breathing, realising she was unconsciously aiming so he did squirt all over his face.  Katie noticed then how taut his testicles had gone in her paw, all drawn up against his body and tight, even his furry sac.  The sperm was thinner than she expected, quite watery, but then this was his third time in 30 minutes.  She gave a soft growl of pleasure as he finally finished and she carefully withdrew her paws.  Sniffing them first, she licked them clean, savouring the taste of him.

"Okay bro, you've had your fun now and I'm hungry.  Gonna take a shower and I'll see you downstairs!" Katie said as she rolled off the bed and got unsteadily to her feet.  Reflexively she held a paw over her slit, but then stopped herself, Tommy had cleaned her up nicely and there should be no leaking today.  They had the house to themselves and as Tommy lay drenched in a daze on her bed, she wandered nude to the main bathroom.  A single one of her brother's sperm cells reached the nucleus of her egg, fertilising it, and shortly after it began to divide.


***

The half eaten pizza lay cooling in its box on the table, an affront to all things healthy and the nicest thing Tommy and Katie had eaten all week.  They lay together on the large sofa in the living room, full and very relaxed as they watched The Lion King on the huge family television.  Neither had admitted how much they liked it to each other, till they'd become close, so watching had become quite significant.  It was a wide sofa with comfy flat cushions, arms not too high, Tommy lay on his side with Katie in front.  A blanket covered them both but if you peeked under it, you'd see the twins were wearing just underwear  and gently embracing.  It was a little awkward, Tommy rested a paw on Katie's side but didn't draw near to her, still unsure and shy around her.  They solemnly watched Mufasa scolding Simba, then make his promise, 'Whenever you feel alone, they'll always be there to guide you..  And so will I'.  The next few scenes passed with a growing unease, both of them frozen and breathless as events unfolded on the screen.

Katie gasped as the stampede sequence begun and Simba was running for his life, Tommy found he was holding his breath.  They both knew exactly what was going to happen but it made it no less terrible, even Tommy felt his eyes welling up as Mufasa did everything in his power to save his son.  The mighty lion roared and was swept away by the stampede, they both gasped and Katie pressed against her brother, chewing on a paw and on the verge of tears.  The music swelled to an unbearable crescendo as Simba watched his father leap impossibly out of the sea of wildebeest, climbing for his very life.  The twins wished everything would be OK but knew it wouldn't, watching for the moment they dreaded.  Katie shook her head, whispering, "No..." as Mufasa fell, Simba screamed, and the tears began falling down her muzzle.  Tommy held her, unable to tear his eyes away, unable to breath until he felt a great sob go through her body and looked down to see that Katie was crying.  She sniffled, wiping her eyes with one paw, but the tears kept on coming, the screen was getting hard to see.  Tommy swallowed, his own eyes brimming, but boys weren't meant to cry.  That's what he'd told himself last time he saw the film alone, and it hadn't helped then either.

They tried to watch as Simba was found by Scar, curled up by the body of his father, 'What will your mother think..'  Katie started sobbing then, her body heaving as the bleak sadness permeated her, tears streaming down her face.  Tommy bit his lip and a single tear fell down each cheek, making his own spotty fur wet, but the only thing he said was, "Shhh..  It's alright Katie," as he stroked gently down her side.  The boy tried his best to comfort his sister, knowing it was mostly futile, neither of them could hold it together through that scene.  Pausing to consider for a moment, he began softly licking the tears from her muzzle, it felt kinda silly but it also felt the right thing to do.  There were a few more emotive scenes, but finally Katie stopped crying as the comic relief of Timon & Pumbaa arrived.  She sniffled for a long time, Tommy allowed himself a few sniffs as well, but then neither could help from giggling as the jokes began arriving

He hugged her for a long time, rubbing her gently with his paw, down her side, back up again, venturing a little lower each time.  She shifted against the cushions and pushed back against him, comfortable and happy to be in his paws, her mood shifting while she sniffled.  Tommy grunted, Katie was warm against him, their fur intermingling as his paw danced across her body.  It was the softest touch and soon he was tracing over her breasts and along her tummy, gentle slight curves all the way.  They were both engrossed in the film and so his paw wandered almost with a life of its own, across her chest and back up, gently stroking the soft fur, then round her tummy, making her shiver.  Tommy shifted then, gripping her briefly as he got more comfy, and then his paw brushed past the frilly waistband of her panties.  They pretended like it never happened, but the leopard's movements became purposeful, touching and feeling lower, his pads grazing over the delicate fabric.  Tentatively he explored, wandering down one side of her crotch and then the other, rubbing all along the edges of his sister's underwear.

Katie shivered, flicked her eyes towards Tommy for the briefest instant, and then reached down to slip her underwear off for him.  He froze for a moment as she pushed them down her legs and kicked them away, but then it was like nothing had happened.  The cub nestled against his sister and tentatively resumed his feeling, rubbing across her tummy and then down either side of what was now exposed, eliciting another slight shiver.  He felt lower, along her inner thighs and then back up, into the soft crevice where her legs joined her groin, petting and stroking.  Simba and Nala were serenading their love to each other, when Tommy took a deep breath and then rubbed along his sister's slit with the edge of his paw.  Katie gave a little whimper and Tommy rubbed again, pressing his fingers against her this time, feeling them parting her warm flesh.  Grunting and suddenly quite uncomfortable, he reluctantly withdrew his paw and then pulled his own underwear down, sighing happily as he freed his growing penis.

Reaching back up, his paw bumped against Katie's tail and then rump, and he paused, lingering on the soft, shapely area.  Once again his paw started roaming, tracing around her curves, along the base of her tail and then under it, feeling down her crevice and making her murmur.  When he reached her legs, Katie suddenly parted them, letting her brother feel all the way round, and so he did.  With a slight tremble, Tommy felt up his sister, rubbing his paw between he legs from back to front and then front to back.  She moaned and he kept going, pressing his middle finger against her while he rubbed, until at last it slipped inside her vagina.  She was warm and moist inside, accepting his finger easily, and so he joined it with a second and made her groan.  It felt so exciting to be touching her like this, in this position, but Tommy knew what had to come next.  He came closer to her, nuzzling into her neck and bumping his erection against his paw as they embraced for an incestual mating.  Somewhere inside Katie, a rapidly dividing bundle of cells attached itself to the side of her womb and though neither of them had any idea, as of that minute she was officially pregnant.

Tommy pulled his fingers out and then guided his stiff penis into position with a trembling paw.  Holding it, he angled it forward and grunted as his tip met the warm groove of his sister.  Tommy pushed, felt it slide between his fingers and along her slit, until it found her entrance.  Ever so slowly, he entered her, nudging little by little into her welcoming vagina while they watched the film.  He could hardly stand it, resisting the urge to simply thrust deeply into her, but it felt so very nice.  Tommy withdrew his paw and brought it around to stroke at her tummy instead, as he eased his erection inside.  Finally their two bodies met and each gave a little moan as he came to rest, only his soft balls remaining to brush against her legs.

Suddenly there was a sound in the hall, they both stiffened at an awfully familiar sound of keys jangling, entering the front door lock and finally the front door opening with a clatter..


To be continued!
