Roxy nuzzled the soft pillow, smiling from the sensual warmth blossoming between her slim thighs.  Roxy bit her lower lip, shivering slightly as the heat increased within her cunt, throbbing with lustful abandon.  Warm juices flowed from Roxy's vagina, the girl sighed, her clit swelling until it ached.  Still smiling, Roxy opened her eyes, looking down at her outstretched legs.

 Caitlin's head was resting against Roxy's closed thighs.  The taller girl was licking her younger sister's pussy, moaning in bliss while she ran her tongue up and down Roxy's quivering slit.

 "Cat!  No!" shouted Roxy in shock, pushing Caitlin away from her.

 Caitlin sat up, her face marred with confusion.  She licked a drop of cunt juice from the corner of her mouth, her large, green eyes gazing at Roxy's crotch hopefully.

 "Stay right here!  I'm taking a shower!" grunted Roxy in exasperation, crossing the small bedroom naked to the equally tiny bathroom.  Roxy slammed the bathroom door shut before twisting on the shower and stepping inside.  The short girl let the water spray pour over her, relaxing taut muscles.  Once she was thoroughly soaked, Roxy filled her right palm with shampoo and started lathering her short, raven hair.

 Long, graceful fingers joined Roxy's, massaging the girl's scalp.  Roxy growled in anger, spun to look up at Caitlin, who smiled warmly down at her.

 "Help clean," offered Caitlin enthusiastically.

 "I liked you better when you were the smart one," muttered Roxy, trying to ignore Caitlin's large tits that filled her vision.

 Although she no longer possessed gen-enhanced strength or endurance, Caitlin could still overpower her smaller sister when she wanted to.  Cat turned Roxy around to face the pounding shower, then resumed soaping Roxy's silky hair.  Despite herself, Roxy relaxed underneath her sister's gentle touch.  Caitlin rinsed Roxy's hair, then began lathering the young girl's entire body with soap.  Roxy sighed as Caitlin soaped her shoulders, breasts, stomach, and legs.  Caitlin turned Roxy's back to the shower, then ran deft hands down the slope of Roxy's spine, washing her smooth skin to the curve of her tiny buttocks.  Roxy rested her palms on Caitlin's firm tits, standing on tiptoes while Cat soaped her ass, fingers slipping into her crack to caress her wet cunt.

 Grinning mischievously, Caitlin inserted her index finger into her tiny sister's pussy, slowly pushing it deeper and deeper into Roxy's vagina.  Roxy moaned softly, her hands tightening upon Caitlin's massive mammaries.  Caitlin wrapped her left arm around Roxy's thin waist, her finger continually thrusting into her sister's clenching hole.  Roxy leaned forward against Cat, slowly opening her mouth and sliding the tip of her tongue over Caitlin's dripping left nipple.  Caitlin groaned with pleasure, her nipple instantly stiff while Roxy licked it over and over.  Roxy's hips gyrated as Caitlin continued fingering her pussy, adding a second finger inside her melting cunt.  Caitlin rested her cheek on top of Roxy's soaking hair, moaning in ecstasy from her sister's oral affection.  Roxy took Caitlin's entire brown nipple into her small mouth, sucked earnestly on the hard nub.  Caitlin rubbed her red bush over Roxy's right thigh, leaving a trail of clinging honey on the thigh's flesh.  Roxy's hips jerked faster, she started panting violently every time Caitlin stabbed her fingers into yielding, pink cunt flesh.  Roxy slid her cheeks across her sister's milky breasts, drool splashing between the mounds from Roxy's quivering lips.  Roxy hugged Caitlin's shapely hips, groaning loudly as she orgasmed with her sister's fingers still buried in her shuddering vagina.
*****
 

 Roxy finished tying her sneakers.  She stood up from the small bed, glancing furtively at Caitlin, who sat cross-legged on the matching twin bed.  Roxy was dressed in cut-off jean shorts, a small, black halter-top, and pink ankle socks.  She wore two pink clasps in her dark hair.  Caitlin wore snug jeans, a green t-shirt, and a bright, hot pink ribbon in her shoulder length red hair near her right ear.  At the moment, Cat was eating a chocolate bar happily, bits of smeared chocolate staining the corners of her mouth.

 Ashamed of her moment of weakness with her sister, Roxy left the hotel room and walked along the sidewalk to a decrepit pay phone.  She punched in the number that Lynch had told her to use in case of emergencies.  Roxy let the line ring ten times before she slammed the receiver onto its cradle.  Money was running out.  She would either have to steal some more soon, which was dangerous, or she would have to get a temporary job to raise some quick cash.  Roxy looked back at the room she shared with Caitlin.  She couldn't leave her sister alone, Cat was still very unstable, little more than a child with an insatiable need for sex.  Sighing, Roxy returned to the hotel room to collect Cat.
 

 It was almost midnight when the bus reached its stop in Clifton, Arizona.  Roxy shook Caitlin awake, then took her sister's hand and led the way off the crowded bus.  The air was cool and welcome after the stuffy atmosphere of the bus.

 "I'm hungry," said Caitlin, mesmerized by the string of fast food restaurants lining the road.

 "Yeah, me too," replied Roxy as she scrounged inside her shorts' pockets.  When Roxy withdrew her hand, only two dollars and some change rested in her open palm.

 "I'll go get a milk shake that we can share.  Stay here where I can see you."

 Caitlin nodded, sitting on a nearby bench.  Roxy smiled reassuringly before heading towards a McDonalds.

 Caitlin gazed up at the twinkling stars, giggling as she admired the bright lights.  A long, black limousine slid up to the curb, the darkened passenger window lowered silently.

 "Want to party?" inquired a sharp, cold voice.

 "I'm supposed to stay here," said Caitlin with a shake of her head.

 "I'll pay you well," countered the passenger, waving a wad of green bills at Caitlin.

 Caitlin eyed the money curiously.  She remembered Roxy's sad face when the girl searched her pocket and didn't have any left.

 "Okay," nodded Caitlin, standing up and brushing her butt before climbing into the limo with the stranger.

 "Dammit, Cat!  Stop!" screamed Roxy, paper cup clenched in her right hand as she ran after the departing limo.  The black vehicle sailed into traffic, disappearing.

 "I thought you would stay put this time!" panted Roxy, her chest pumping.

 "You won't see that hot bitch again!" cackled an old homeless man sitting hunched along the curb, a bottle-filled sack in his filthy left hand.

 "Why?"

 "That limo belongs to the Lasher, girl!  He's one bad mother-fucker!" giggled the man before he took a long pull from his sack.

 "Do you know where he lives?"

 "Everyone on the street knows where the Lasher lives!  But I wouldn't go there, girl, unless you want to disappear!"
*****
 

 The Lasher's house was a modest two-story in the northern outskirts of Clifton.  Caitlin could see a river flowing southwest a short distance behind the block of houses that made up the Lasher's neighborhood.  The Lasher himself was a man of average height, with short, brown hair and matching eyes.  He followed Caitlin out of the limo, then paid the driver, who drove away without a word.  The Lasher's hand was cold around Caitlin's as he led her inside his house.  After securing the front door, the Lasher guided Caitlin downstairs into a candle-lit, musty basement.

 Aside from a washer and dryer, some taped boxes, and a basket of dirty laundry, the only object of note was a simple, uncovered mattress that sat in the middle of the concrete floor.

 "Kneel on the mattress, please," said the Lasher in a soft, emotionless voice.

 Caitlin obeyed, kneeling in the middle of the stained mattress.  Cat wrinkled her pert nose, the mattress reeked of sweat and cum.

 "Take off your clothes, please."

 Caitlin pulled off her t-shirt, then sat on the mattress to slip out of her tight jeans.  Socks and panties joined the pile of clothing on the floor.

 "Kneel again."

 Cat knelt, hands resting in her lap.

 The Lasher pulled out a set of manacles from one of the boxes.  He approached Caitlin, only his eyes betraying a hint of excitement.

 "Hold out your wrists."

 Caitlin stretched out her slender arms, and the Lasher snapped heavy, iron manacles around her thin wrists.  The Lasher returned to rummage in the boxes, Caitlin lowered her shackled hands back onto her lap.

 The Lasher withdrew one item at a time, fastening a studded leather collar around Caitlin's neck, then securing a red rubber gag ball inside her mouth.  A second set of iron manacles were locked around Cat's ankles.  Caitlin watched as the Lasher set up a video camera upon a short tripod.  He checked to make sure that the camera was focused on Caitlin before switching the recorder on.

 The Lasher slipped on a black leather hood, the mouth slit zippered shut.  He took off his clothes, revealing a pale, bone-thin frame.  The Lasher's cock was slowly stiffening as he removed a long, leather riding crop from a box and approached the gagged and manacled Caitlin.

 "Bend over, please."

 Caitlin leaned forward, her nipples touching the mattress.  She glanced back at the Lasher, waiting expectantly.

 The riding crop cracked over Caitlin's ass.  Caitlin moaned into her gag, her pussy already becoming moist.  The Lasher rained blows on Cat's sensual buttocks, marring her smooth ass flesh with long, throbbing, red welts.  Tears of pain glimmered in the corners of Caitlin's eyes.  Drool covered the ball gag, dripping down onto her enormous tits.  The Lasher began whipping Caitlin's back, the hard leather kissing the shackled girl's creamy skin.  Caitlin's ass bobbed up and down, the smell of her arousal filled the Lasher's nostrils.  He slapped the riding crop down again and again, stroking Caitlin's back, always adding another beautiful welt onto her slender body.

 The reek of Caitlin's wet pussy became too much for the Lasher.  He opened his mouth slit and fell onto the mattress behind Caitlin, spreading her ass open with his fingers before digging his lips inside her trembling cunt.  Caitlin moaned loudly into her gag, her tits shivering as the Lasher sucked on her pussy, his tongue writhing within her vagina.  The Lasher fondled Caitlin's bruised buttocks, he ran his tongue up and down her musky crack, suckling her aching clitoris with cool, firm lips.  The Lasher stabbed an index finger into Caitlin's bunghole, driving it in to the knuckle while he slurped on her cunt, her juices covering his leather-clad face.

 With his cock hard and erect, the Lasher knelt up and slowly pushed his meat into Caitlin's twitching cunt hole.  He moaned in ecstasy as Cat's vagina squeezed his shaft, her warm juices covering every inch of his engorged member.  Caitlin stared into the recording camera, saliva covering her chin, sweat pouring off her naked body.  The Lasher pulled Caitlin into an upright kneeling position in front of him, his thrusts shaking her rounded hips.  He reached around Caitlin's ribs, grasping her large tits, caressing them for the camera.  The Lasher pinched Caitlin's stiff nipples, making her moan into her dripping gag.  He ran his hands all over Cat's glistening body, fondled her tight, flat belly.  The Lasher's hands lowered to stroke Caitlin's wet thighs.  He scratched the naked girl's patch of red pubic hair, eliciting a loud groan and an explosion of honey that sprayed out onto the damp mattress.

 Caitlin fell forward onto her manacled arms, her bruised buttocks thrust up high into the air.
The Lasher slapped Caitlin's ass with his hands, squeezing each ripe butt mound, his cock an oiled piston that rammed into Cat's belly over and over, generating incredible heat within the beautiful girl's vice-like vagina.  The Lasher gasped sharply, removing his enlarged cock and squirting bursts of white jizz across Caitlin's ass and spine.  The Lasher gazed into the camera, sliding his hands over Caitlin's panting body, spreading his cream across her milky skin.
******