Chapter 1

"This is the last one of your's." said sixteen year old Michelle North, carrying a battered cardboard box with 'Katie's Stuff' scrawled on the side,

"Ah, thanks sis," said thirteen year old Katie, taking the box from her older sister's hands, "Where's Mom?"

"Gone to get the last of the boxes from storage. She said she shouldn't be too long."

The two North sisters, and their mother Claire, were in the middle of a difficult change in their lives. Their father and husband had been, literally, caught sleeping with another woman. The divorce afterwards was messy and painful for all three North women, and had resluted with Mr North leaving with his new squeeze.

With money she had recieved as part of the divorce settlement, Claire decided that herself and her two daughters, were going to move out of the bustling, secretarial slut filled city and move into the countryside. As Calire always said, 'change is a good thing',

"Good," said Katie, wiping her brow, "I'll be glad when we've got all this stuff sorted."

Michelle nodded in agreement and sat on her sister's bed, running her fingers through blonde hair that trailed to the middle of her back, her emerald green eyes regarding the mountains of boxes that littered the sister's shared bedroom. Her body was toned and athletic, the result of many years of being on her school's competitive swim team, with her firm B-cup breasts clad in a tight fitting, white, short sleeved polo shirt and a floaty, red mini skirt barely covering her long, tanned legs.

Katie wasn't much different from her older sister. She had inherited the blue eyes of her father as well as the blonde hair of their mother, but prefered to keep her's cut short. That, and her healthy interest in soccer, had given her a reputation as a bit of a tomboy. Her body was rather slim and fit, but had not yet developed the curves of her sister or mother. She wore a loose yellow T-shirt that hid her tiny, bra-less breasts and a pair of faded jeans that hugged her perky, young butt,

"Hey, could you give me a boost?" asked Katie, grabbing around the top shelf of the large, built-in wardrobe, "I think there's something up there."

"Okay, but watch out for spiders." she replied, putting on a spooky voice,

Michelle wrapped her arms around Katie's legs and hoisted her sibling up with a quiet grunt of effort,

"Hey, it's a box!" said Katie with surprise,

Michelle lowered Katie to the ground and saw it was just that. A wooden rectangular box, about ten inches by four, covered with dust and with a looping, celtic pattern around the edges. Katie blew off some of the dust and set it down on her bed,

"Do you think it was left here by whoever lived here before us?" she askd her older sister,

"I suppose," replied Michelle, leaning in for a closer look, "I mean, it doesn't belong to us, does it?"

"Maybe it's worth something!" Katie said excitedly,

"Maybe. Open it up."

Katie fingered the gold clasp at the front and the lid popped up. Her hand was trembling slightly as she pushed the lid open all the way. Inside was a cylindrical object wrapped in a black, silky cloth,

"Oh my god!" squeaked Katie, after she had unfolded the cloth, "Is that what I think it is?"

The object under the cloth was about nine inches long and two inches thick. It was made of a clear glass, and was clearly shapped like a penis, with a spherical purple gem set within it's head,

"Holy crap," said Michelle, holding back a giggle, "It's a freaking dildo! It's probably about a hundred years old, or something."

"So, whoever lived here before us, left it here?" asked Katie, her cheeks turning a flushed pink,

"Guess so," said Michelle, reaching her hand towards the box, "I bet she was disappointed when she was unpacking, huh."

"Eww," squealed Katie, "Don't touch it. It might be diseased or something."

"Oh, lighten up," teased Michelle, "Don't tell me you've never-"

Michelle's voice cut off when she wrapped her hand around the glass shaft, which pulsed with a purple light that filled the room and knocked the elder girl to the floor,

"Michelle!" shrieked Katie, "What happened!?"

Her sister responded with a groan of arousal as she rolled on the floor, rubbing her thighs together in an attempt to sedate her suddenly aching sex. Michelle reached under her skirt and slipped her fingers into her panties, the black material already soaked with her juices, and pinched and squeezed her stiffened clit,

"Oh goddd," moaned Michelle, pulling her underwear down her legs and kicking them off her bare feet, "I'm sooo horny!"

"Stop it, Michelle!" said Katie, watching in shock as her sister held her skirt above her waist and ran the glass toy up and down her sex, "I mean it Michelle, stop it!"

The thirteen year old reached down to grab the toy from her older sister's hand but when she touched it, there was another purple flash and she felt her own body tremble before she fell to her knees, one hand instinctively cupping her own warming snatch through her tight jeans.

Michelle didn't notice any of this, she was too caught up with her own growing desire. She pushed the glass cock into her tightening hole, feeling the cold toy stretch her sex. She moaned harder and pumped the toy into herself faster, her pussy feeling like it was on fire as she worked her clit with the hand not fucking herself senseless. Her moans came louder as her orgasm built up inside of her, blocking out the faint sounds of her younger sister's moans, before her climax washed over her, leaving her sweating body shaking on the floor.

Katie couldn't take her eyes off her writhing sister and she pushed her jeans down to her knees, her sopping pink panties clinging to her wet sex. Her hand became a blur on her own sex as Michelle oragsmed, her squirting pussy contracting around the glass dildo. As her sister's moans grew quiet, Katie heard tearing coming from Michelle's shirt. The cotton tore violently down the middle, and her swelling breasts burst free, the black bra she wore straining to hold them in,

"Oh fuck..." she said, hissing through her teeth, "It's so tight."

Michelle held her growing chest with her hands, trying in vain to hold them back, but they continued to grow, pushing her bra to it's limits. Before she could reach around behind her to undo the clasp, the cups snapped apart and her breasts spilled out. With one hand she cupped her, now, DD breast, squeezing the warm flesh between her fingers, feeling her orbs continuing to grow in her hand,

"Oh yes..." she moaned, "This feels sooo good..."

Her breasts continued to grow as She felt herself up and her gaze moved to her younger sister, who's fingers were burrowing deep into her snatch. Michelle cupped one of her breasts and held it up, offering it to Katie even as it developed still in her hands. The younger sibling crawled over to her, one hand glued to her mound, and took one of the nipples, sucking the inch long nub into her mouth, her cheeks puckering inward,

"Oh god Katie," Michelle whimpered, "Keep sucking my fat titties!"

Katie let the nipple slip out of her mouth and moved to the other breast, rolling her wet tongue around in lazy cirlces. Both Michelle's breasts had finally stopped growing and she was left with a pair of round and full H-cup breasts that stood firm on her body, their weight causing them to sag downwards ever so slightly. She took her younger sister's head in her hands and pulled her away from her breast, the fleshy orb being stretched outward as Katie's mouth refused to let go. When it finally popped from her mouth, it sprung back, nodding up and down. She slipped the glass toy into Katie's mouth, letting her taste her older sister's sex,

"Does that taste good?" she asked, her voice dripping with lust, "Do you want to feel it?"

Katie nodded enthusiastically and Michelle pushed her sibling down onto her back. Setting the toy down for a moment, she tugged Katie's jeans off her toned legs, followed swiftly by her panties. She threw them against the wall, and the garmnet was so saturated with arousal, that it stuck to the wall for a few seconds before slowly sliding down. Katie's legs spread like warm butter and Michelle watched as her sister's young pussy opened before her,

"Are you ready?" asked Michelle, running the toy over Katie's pussy, coating it in her oil,

"Of course I'm ready, Mikey!" Katie practically screamed, using the nickname she hadn't called her sister by in years, "Hurry up and fuck me!"

With one arm wrapped around her sister's trembling leg, Michelle gently pushed the tip of the toy against her wet hole. She had to work the toy in slowly, inch by inch. Katie's virgin pussy was incredibly tight, and it wasn't long until Michelle found the barrier of her hymen. To help blot out the pain, Michelle sucked Katie's pointy clit into her mouth, flicking at it with her tongue, causing the thirteen year old to rock back and forth. When she felt her younger sister's body tense with her orgasm, she pushed the toy forward in a single motion, tearing through her maidenhood. 

Katie felt the stab of pain for only an instant before it was pushed aside by the intoxicating rush of pleasure that followed it. Her teen body writhed and shook on the floor as her older sister pumped the glass cock in and out of her hole, faster and faster, bringing her quickly to a roaring climax. As Katie caught her breath, Michelle slid the toy from her sister's sex, beads of girl-cum connecting her to it. She took it into her mouth and sucked the fluid of her sister off the cold glass.

As Michelle cleaned the toy, Katie felt a sudden burning sensation in her chest. Her hands moved up and clutched her small breasts through her T-shirt and she could feel the soft plums growing bigger in her hands. Michelle watched with a smile as her sister's baggy T-shirt started to press against her blossoming body. She could make out Katie's stiff nipples, and even her swollen areola were visible, through the material. Katie cooed at the feeling, kneading and groping her breasts as the T-shirt slid up her body, exposing her smooth stomach. When the orbs had stopped growing, she tugged the tight fitting garmnet and lifted it up and over her head, her bare, now G-cup, breasts bouncing up and down with the release, and dropped it on the floor,

"Come here Kitty." said Michelle, beckoning her sister over with her finger,

Katie again crawled to her sister, her large breasts swinging to and fro underneath her. Holding her head in her hand's, Michelle leant in and pressed her lips against her sibling's. They started out softly, but rapidly grew passionate in their embrace. Katie wrapped her arm's around Michelle's back and pulled her closer, the sister's breasts mashing against each other, their stiff nipples stabbing into one another's flesh,

"God, Mikey," panted Katie, nibbling on her sister's earlobe, "I wanna fuck you so badly."

"Oh Kitty," moaned Michelle, handing the toy to her, "I want you to fuck me."

Michelle lay on her back and opened her legs but Katie shook her head, her breasts joining in, and twirled her fingers. With a naughty smile, the sixteen year old rolled over onto her hands and knees, and stuck her round ass in the air,

"Mikey, your ass is so firm," said Katie, squeezing on one round cheek while coating the toy with Michelle's flowing pussy juice, "I wanna fuck it."

Katie brought the toy up and pushed at the entrance of her sister's butthole, the puckered orifice opening up to accept the glass intruder,

"No, don't fuck me there!" said Michelle, but even as the words came out of her mouth, her body pushed backwards, taking more of the toy inside her,

The older sister let out a deep groan as the toy was pushed all the way in, her virgin asshole stretched wide to accommodate it. Michelle raised one leg and placed it on the bed, giving her sister better access as she moved the toy back and forth, pulling it all the way out before ramming it back in. Katie rolled onto her back and slid under her sister's legs, with one hand pumping the dildo in and out and the other working on her own sex, she stuck out her tongue and licked and sucked on Michelle's sopping pussy,

"Kittyyyy..." moaned Michelle, her hips rocking up and down, "That feels soooo fucking goodddd..."

Katie saw her sister's body begin to tense up, a sure sign she was about to cum. She worked the hand on her pussy faster try to catch up. Soon, she felt the muscles in her own body turn rigid, and the two siblings came together, Michelle's pussy muffling the screams from her younger sister as her ass contracted around the glass toy. Michelle's upper body slumped to the floor and the muscles in her ass pushed the toy out of her. It landed on Katie's stomach as she continued to suck her sister's clit and rolled onto the floor.

Michelle could feel every muscle in her body shaking, but then felt a familiar heat build up in her. It wasn't focused on her breasts as it had been last time, but much lower down. Her thighs clamped themselves on Katie's head and she rode her sister's face. Katie held onto her sister's hips as she felt the stiff nub in her mouth begin to grow. It quickly filled her mouth and she was forced to let it pop out, flicking saliva into the air. Michelle's clit kept growing, gaining inches in thickness and length in seconds. When it was done, it ended up looking like the glass toy from the box, only smooth and dark pink,

"Holy shit." Michelle said quietly, slowly reaching down to grasp her erect clit,

"What the hell is going on here!" came an alarmed voice from behind her,

Both sisters looked to the bedroom's doorway and saw their mother, Claire, standing out in the hall. She was barefoot, wearing a light blue summer dress and her green eyes were wide in shock. She saw her youngest daughter laying nude, all but for her socks, on the floor, her breasts large and jiggling on her chest. Her eldest was sat leaning against the bed, her breasts bigger than her sister's and a nine inch long pink shaft sticking out from between her legs, the whole room smelling of sex,

"Hey Mommy," said Katie with a smile, sitting up on her knees next to her sister, "Me and Mikey were just playing with this cool new toy we found."

Claire looked around in confusion and saw a glass dildo laying on the floor, close to her feet. She reached down to pick it up and when she touched it, she was blinded by a brilliant flash of purple light and was knocked onto the floor in the hall. The two sister's smiled slyly at each other as they watched their mother, one hand roaming aorund her body while the other held on tightly to the toy. The got up and walked over to her, hand in hand, their hip's swaying from side to side,

"Don't worry Mommy," said Michelle, kneeling down behind her mother, "We can take of you."

She reached around and cupped her mother's C-cup breasts, now dwarfed by her children's, through her dress, pressing her own breasts and hard clit against her back. Katie squatted down, balancing on the balls of her feet, offering her mother a view of her open sex and ran her hands along her legs. She reached under the hem of her mother's dress and slowly pulled down her lacy underwear, inhaling her scent before throwing them over her shoulder.

Claire gasped loudly when she felt her youngest run her tongue along her slit, taking her stiff clit greedily into her mouth. Michelle hiked up her mother's dress so she could see better and they both watched Katie's tongue do it's job on Claire's snatch as she sucked noisily on her swollen lips,

"Give her the toy." Michelle whispered huskily into her mother's ear,

Her mother did so and Katie wasted no time in plunging the glass cock into her mother's hole. Claire groaned loudly as her youngest fucked her with the toy as her eldest squeezed and rubbed her breasts, rolling her stiff nipples between her fingers. It had been a long time since the North mother had had a climax and when Katie fucked her over the edge, she split the countryside with her screams, her body a rocking mess of uncontrollable motion and sweat,

"Wow Mommy," Katie giggled, pulling the toy from the hole that gave her life, "You're really loud."

Before she could say anything back, Claire felt a tight heat burning in her chest. Michelle's hands clamped down harder on her mother's breasts as the quickly began to grow, straining against the thin material. Claire felt pressure building up from deep within her and two wet spots appeared on her dress where it covered her breasts, it grew darker as her nipples pushed out, hardening before a jet of white fluid squirted through the material. Katie caught some on her tongue and face lit up at the taste,

"Mommy's milking!" she said with an excited squeal,

Katie leant forward and grabbed the neckline of her mother's dress with both hands and yanked it down hard. The seams gave way easily and Claire's engorged breasts burst forth, milk spraying freely all around them. Claire's breasts matched Kaite's in size, then kept growing to match Michelle's, then grew even more. The two sibling's were entranced as they watched the two quivering mountains of flesh expand further than either of them. When they finally stopped, Claire was left with a pair of, very heavy, milk-filled J-cup breasts,

"Holy fuck." she said quietly, running her hands over her new tits,

Claire saw the look of hunger on her youngest's face, and offered her a breast. Katie's baby instincts kicked in and she clamped down on a puckered nipple, sucking hard to draw out her mother's milk, murmuring in delight. Michelle leant over her mother's shoulder, eyeing up the other breast. It took both Michelle and Claire to lift the weighty orb to her lips, and she too drank greedily of her mother's tit.

For a while the three North girl's stayed like this, the two sister's feeding on their mother who felt a natural calm wash over her. It reminded her of when her girls were babies, and how at peace she always felt when she was breastfeeding.

Eventually, however, she could no longer ignore the poking in the small of her back and reached behind her to grasp her eldest daughter's enlarged clit. Michelle gasped in shock of the contact and warm milked spilled out of her mouth,

"Now then," purred Claire, rubbing her thighs togther, "Whatever shall we do about this big thing?"

"Can I fuck you Mommy?" she asked, her hips jerking at her mother's touch, "Please? Please can I fuck you?"

No words were needed as Claire opened her legs, being careful not to dislodge Katie who was still eating, but when the youngest sensed movement she let go of the breast to see what was happening. Michelle sunk to her knees between her mother's legs, and gently guided her clit towrads her hole,

Michelle gasped when she first touched the folds of her mother, "It's sooo hot..."

The eldest sibling wrapped her hands around Claire's thighs and began to rock her hips back and forth, her mother's body moving in turn to meet each of her daughter's thrusts. The pace quickened, and Claire pulled her daughter closer, soaking Michelle's skin with warm milk,

"Your pussy feels so good Mommy..." panted Michelle, her face turning red with effort,

"And your big clit feels so hard in Mommy's cunt, baby," said Claire, her finger's digging in to Michelle's shoulders, "Your stretching out Mommy's pussy so much."

Over Michelle's back, Claire saw Katie had her back to the two of them. She was holding the glass dick on the carpet, pointing straight up, and bouncing up and down it as she kneaded a breast. All the while she mumbled, "Bigger... bigger... bigger"

Claire pulled her legs up tight against her duaghter's body, rubbing the soles of her feet back and forth her eldest's firm ass,

"Go faster baby," said Claire, her breathing quickening, "Fuck Mommy's pussy faster."

Michelle smiled with desire and placed her hands on her mother's round hips. Holding on tightly, she moved her body faster and faster, til her own hips were a blur against her mother's sex. Climax washed over Claire like a tidal wave, and she came screaming as her body shook and a fountain of milk gushed from her nipples like a geyser. Michelle's pussy squirted as she too oragsmed and slumped down on her mother's body, sweat mixed with milk running of them,

"Was that as good as Dad?" Michelle asked between laboured breaths,

"Oh, baby," said Claire, hugging her eldest, "That limp dicked bastard has nothing on my big girl."

Michelle smiled warmly and snuggled closer, "Good."

Claire held her for a while, stroking her daughter's back, "What does it feel like? Having a clit like that?"

"What," said Michelle, "A clit-dick?"

"Yeah," laughed Claire, "A clit-dick."

"How about you find out for yourself." answered Michelle,

The sixteen year old got to her knees with a grunt of effort. She turned and saw her younger sister curled up in a ball, her arms wrapped tightly around her chest. She slipped the dildo from Katie's sex, and turned back to her mother, 

"Roll over." she said with a smile,

Claire obediently rolled onto all fours, wiggling her ass at her daughter. The glass shaft was already slick with Katie's juices and it slid easily into Claire's butthole, sliding in all the way to the hilt. Claire moaned at the fullness of it, and again when she felt Michelle push her clit-dick into her dripping pussy,

"How does that feel Mommy?" said Michelle, alternating between the glass dildo and her clit,

"That feels fucking great, baby," moaned Claire, her hips moving back and forth,

Michelle tried to keep a ryhthm going as she pumped her mother's holes, but this quickly broke down into her fucking her as hard and fast as she could. With each thrust inside of her, Claire's breasts let out a splashing of milk, quickly forming a large puddle underneath her. She felt Michelle resting on her back, trying to get as much leverage with each thrust as she could. The two came together, cling to one another as their bodies shook, sweat glistening on their skin.

As they caught their breath, Claire felt heat on her clit. She cupped her hand over it, and groaned as her clit began to swell and grow. It pushed through her fingers, trailing up her abdomen, twitching and pink. When it stopped growing it was three inches longer and an inch thicker than Michelle's and pressed flat against her body,

"Oh shit," she moaned, rubbing her hand along it's length, "I have to fuck someone."

"I can think of someone." said Michelle, nodding her head towards Katie's trembling body,

Claire smiled and crawled over to her youngest, "Oh, Kitty-Kat," she said, "We want to play."

As she got closer however, she noticed that wasn't shaking from orgasm. She was crying,

"Katie," said Claire, kneeling down next to her, Michelle quickly joining her, "What's wrong, sweetie?"

"I just wanted to make them bigger." she replied quietly, not moving from her foetal position,

"C'mon Kitty," said Michelle, stroking her baby sister's legs, "Your titties are gorgeous. It doesn't matter how big they are."

"That's not it." said Katie,

"Well then, what's wrong?" asked her mother,

Katie wiped her eyes and slowly sat up. She took her arms away from her chest, and her sister and mother gasped in unison. Katie's G-cup breasts had stayed the same, but below them a second pair, identical to the first, had grown. The weight of all four breasts caused the thirteen year old to lean forward slightly,

"Oh Kitty," breathed Michelle, "They're beautiful."

"They are?" asked Katie,

"Oh sweetie," said Claire, running her hand along the four soft, orbs, "They're incredible. You've got more titties than me and your sister put together."

Katie smiled and dried her eyes. She leant back on her hands and stuck out her four breasts, "I do, don't I?"

"Yes, you do," smiled Claire, "And look what Mommy's got."

"Whoa," said Katie, her gaze falling to her mother's shaft, "It's huge!"

"Yes, it is," said Claire, gently pulling her daughter on top of her, "And Mommy wants your's to be the first cunt she fucks with it."

The thirteen year old eagerly pushed her mother to the floor, her young body straddling Claire's clit-dick. Katie moved up and down, her breasts shaking with each thrust. Her mother reached up and fondled Katie's lower pair of breasts, rubbing her thumbs in circles around her nipples,

"Oh Mommy," moaned Katie, "Your're so big inside me."

Michelle came up behind her sister and pushed her forward gently. She took hold of her clit-dick and pressed it against her sister's asshole,

"May I?" she asked, already working the tip of her rod in,

Katie nodded and Michelle pushed forward, her younger sister grunting at the penetration. Michelle reached round and squeezed at her sister's upper pair of breasts,

"That's two of your virginitys I've taken in one day," said Michelle with a happy grin, "You are so totally my slut."

Katie leant back against her sister, her body shaking with arousal, her hips jerking to keep up with the thrusts of her mother and sister. Words became useless as all three North females bucked and writhed against each other. Their bodies moved as one, becoming a single mound of sweaty flesh. Katie came first, her young muscles clamping down hard on the intruding shafts, tightening up against any movement. Michelle followed her, her clit-dick tingling with desire as Katie's ass held on firmly. Claire wasn't far behind, her breasts leaking milk like a tap on full and her hips bucking wildly up and down forcefully, trying to get as deep as she could into her youngest's core.

When they were all screamed out, the three collapsed into a pile, holding each other tightly and trading kisses, tasting the salty sweat on each others skin,

"You see," panted Claire, groaning as Katie sucked a milky nipple back into her mouth, "It's like I always say. change is a good thing."