Date: Fri, 14 Apr 2023 15:30:22 +0000 From: cbravo275@proton.me Subject: A Mutually Assured Attachment - Chapter One - Incest If you can, support Nifty with a donation - whatever you can afford - so that this archive of stories can remain free and available. Just go to http://donate.nifty.org/ A Mutually Assured Arrangement Chapter One Eighteen year old Cassie St. Claire stood at her little brother's bedroom door, seeing him admiring himself in his mirror. He's nine and a half year old Caleb St. Claire and he had finished with his morning shower. He stood before his mirror in red boy briefs with white borders. It's the low cut pouch underwear with the waistband sitting low on his waist and the pouch perfectly filled in with his significant bulge. It's Friday morning and their mother, Margot St. Claire, had already left for work. Their fathers are non-existent in their lives. Margot had given birth to Cassie shortly after turning thirteen years old. While Caleb happened to have been the product of a college one-night stand. Cassie's mesmerized by Caleb's ample bulge that she can't take her eyes off of it. The silhouette of his circumcised cock head and sizable balls can be made out. For such a little boy Caleb has quite the big cock Cassie thought to herself. He's already making the transition from boy to developing into a young man. His young flaccid cock already measures a svelte four inches long with a smoothly pale white shaft and subtle faint stubbles of blonde pubic hair atop the base of his cock. Caleb has a bulbous knobby radiant pink cock head with a broad but thinly crowned ridge. He has a blazing red ring that is his circumcision incision with the little excess skin collecting behind his cock head. His balls have grown significantly as they hang loose and away from his body within his hairless silky smooth glowing pink scrotum. Caleb stands four feet tall with a skinny wiry frame. His small pink nipples show brightly against the pasty white skin of his flat chest. His olive green outdoors digital watch looks especially bulky on his thin wrist. He's got a taught feminine torso with a bubble butt and smooth wiry legs. "Looks like you've got quite the big cock for such a little boy," Cassie says flirtatiously. Caleb turns to Cassie and sexually looks her over with a cupped hand massaging his bulge. Especially eyeing her bra-less voluptuous big tits with her nipples poking through her top. Caleb also notices that Cassie's pussy mound is smoothly bald through her sexy lacy sheer pink thong panties. Her roundly plump ass is complimented by her wide birthing hips. Further enticing Caleb's arousing gaze, Cassie removes her top to expose her voluptuous big tits to him. Her pink little nipples are aroused and erect for her little brother's youthfully big cock. She drops her sexy lacy sheer pink thong panties and steps forward toward him. Confirming her pussy to be completely bald. Caleb notices the glistening wetness permeating from her thick plump hairless pussy lips. The pouch of his briefs quickly tightens as his bulge stiffens into gradual erection. He takes off his underwear with a semi-stiff cock swinging before her. Cassie bites her bottom lip and smirks enticingly at Caleb. "Your cock looks so yummy," Cassie continues to flirt. Cassie pushes Caleb onto his bed and she sits on her knees between his wiry pale legs. She quickly emphatically suckles his sperm heavy balls causing his cock to instantly stiffen into full and complete erection. Cassie's eyes grow big at the size of Caleb's cock. Amazed at how much bigger it's gotten since she's last seen it. No longer does Caleb possess the short stubby infantile cock Cassie used to enjoy fondling when he was much younger. Her mouth salivates uncontrollably at the size of his rigid member and her pussy drips from growing soaking wetness. His cock felt intensely warm and throbbing but still velvety soft in her touch. Grasping his shaft in one hand causes the pursed slit of his cock head to spit clear eager precum. Cassie teases Caleb, "So, this is the cock that absolutely loves to cum in my used thong panties when you jerk off?" Caleb nods yes. Cassie then asks, "Do you sniff my used panties too to get a smell of my pussy?" Caleb nods yes. Cassie smirks and giggles. Her warm tongue fondles his hot and heavy balls before working up to his shaft. Caleb shivers and groans at the sensation of her warm breath caressing his cock and balls. Cassie feels Caleb's cock tense and throb in her hand's grasp while his balls seizes and tenses with increasing arousal. His inner thighs glow a tender arousing pink as he feels the intensifying heat emanating from his genitals. Cassie can only smirk and giggle excitedly as she watches Caleb wince and moan with excitement as he enjoys the overstimulated sensations of her mouth working on his uncontrollably stiffening member. His balls begin to feel tender and ache with eager horny heat; they're more than ready to impregnate. He can feel his bulging bulbous knobby cock head pulsate and throb while feeling the horny heat emanating from its crowned ridge, as if trying to cool itself off. Caleb nonetheless felt his cock shiver and squirm at the warmly wet sensation of his big sister's tongue caressing his rock hard throbbing circumcised cock. "I don't remember boys having cocks this big at your age, baby brother," Cassie says flirtatiously, "The girls in your class must be loving your big cock." Caleb can't help but smirk at her remarks. The pupils of his eyes are big as saucers as he focuses on his big sister's mouth making love to his cock. His mouth gapes open with heavy breaths as his chest is visibly heaving big gulps of air. His little pink nipples are standing erect with horny, gleeful arousal. His body is still and tense, prickled with goosebumps, as he watches on. Caleb's erect cock is six and a half inches long the last time he measured. While he currently lacks girth, his slender cock still more than makes up for in length. His cock head is still big and knobby in its bulbous appearance with his pursed slit uncontrollably drooling and dripping with precum. It's the horniest he's ever felt at his young age. Cassie's tongue fondles the frenulum of his circumcised cock head and licks all along its crowned ridge. She smirks some more before engulfing his cock head into her mouth and begins suckling him affectionately. Caleb's gaped mouth unexpectedly moans aloud and shivers shoots up and down his spine at the sensation. His body trembles and tenses as he feels both her sucking and her tongue working his cock head. Cassie spits on Caleb's cock and begins vigorously jerking him off with his balls jostling between his tender thighs. Her big perky tits bouncing to her vigorous stroking causes the pursed slit of his cock head to spit more precum. Cassie happily licks up and tastes his juices as she jerks him off. Then back to suckling his cock head as her hand continues stroking his youthfully strong slender cock shaft. Cassie flirts once more, "You love that don't you little brother?" Caleb nods yes. She engulfs his cock once more and begins to suck deeper down his cock shaft. She looks up at him with big innocent puppy eyes as her head eagerly bobs up and down his cock's shaft. His ears finely tuned to her mouth's sloppy slurping sounds as she sucks him off. Caleb feels Cassie's hands massaging and tugging at his hot heavy balls. "You've got such a big dick for a little skinny boy, baby brother," Cassie moans. Cassie then squeezes Caleb's cock between her big perky tits and begins titty fucking him. Spitting and moaning for Caleb's big young cock as she does so. Caleb reaches for her perky pink tits and gives them a pinch and pull, causing Cassie to moan. He continues to pull and twist at her erect pink nipples as she continues titty fucking his impressive cock. "Your big cock feels so good, baby brother," Cassie remarks suggestively and smirks. Cassie then proceeds to deep throat the full length of Caleb's rigid cock. Caleb moans louder at the sensation of her mouth and hearing her choke and gag on his member. His balls tense and hug tight to his body with his hands clasping to his bed sheets. His hips involuntarily thrusts upward into her wanting wet mouth. Cassie then asks, "Does baby brother wanna fuck my wet pussy?" Caleb nods yes. Cassie lays next to Caleb and spreads her legs wide open. Caleb masturbates as he watches Cassie rub and finger her soaking wet pussy for him. Unable to control himself, Caleb gets up off the bed and stands between Cassie's splayed legs. His cock in hand he jerks himself off to Cassie fingering her pussy until she squirts onto his cock. Caleb then spanks and rubs his cock against Cassie's soaked wet pussy. Then both let out satisfying moans as they both feel the sensation of Caleb's cock head slip easily into Cassie's pussy with how wet she is. Caleb continues to moan as he's greatly turned on with how immensely warm and wet Cassie's pussy feels as he slowly slides every inch of himself deeper into her. Caleb continues pushing in until he's balls deep inside her with his sperm heavy balls firmly pressed against her taint. Caleb feels Cassie's pussy hug his cock as he begins slow affectionate thrusts into her. Helpless to his youthfulness, Caleb quickens his thrusting pace, eager to ejaculate the heavy load in his balls. His body tensed and stiffens as he eagerly focuses on fucking Cassie. His knees and arms firmly planted as he vigorously thrusts his hips with great effort. Caleb grows increasingly turned on by the sound of his heavy balls loudly slapping hard against Cassie taint and the sloppy sloshy wetness of her pussy from fucking. He grunts and groans from gritted teeth as the growing tingle in his balls gradually intensifies. Making him fuck harder and faster. Pumping Cassie's pussy balls deep with cock. Eventually, Caleb involuntarily but naturally, pushes every inch of his six and a half inch circumcised cock balls deep into Cassie's pussy and lets out deeply satisfying moans, as his body stiffens and tenses. His heavy balls ascend to hug tight to his body as they too, tense and pulsate. Both feel every inch of Caleb's cock arduously pump and throb inside Cassie's pussy. Cassie only smiles with delightful satisfaction from Caleb's intensifying orgasm. Caleb's bulging bulbous knobby cock head intensely throbs while balls deep inside Cassie's warm wet pussy. The pursed slit of his cock head bursts open to release huge thick torrent threads of cum deep inside Cassie. It's most definitely the most he's ever ejaculated as it feels that it lasts a few minutes before his heavy balls feel light and start throbbing with a feel good ache as they drop loose once more after unloading. Cassie feels the intense warming sensation of all the sperm Caleb had unloaded deep inside her. Caleb gradually pulls out his tired half limp cock out of Cassie's now sticky, tacky feeling pussy once her wetness has started to dry. His cock still feels intensely warm and pinkish. His balls hang loose between his thighs as his red hot silky smooth scrotum cools from horny heat. No cum oozes from Cassie's creamy wet pussy. Caleb feels deeply satisfied with himself with the idea that he's seeded his big sister's fertile pussy. Even then, Cassie laid in Caleb's bed for several minutes longer to ensure his young sperm remained inside her. Caleb's cock had shrunk to an almost infantile size while his balls hung low and away from his body, gradually cooling off back to its normal pigmentation. Both decide to share a shower to wash the smell of sex off of themselves. Little did they know that their mother had peeked at their orgasmic happy ending.