Futa Parasite Saga - Grace And The Unstoppable Growth - Story below must read Futanari
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July 14, 2026
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Grace stumbled drunkenly into her bedroom after a long night out. The room spun slightly as she kicked the door shut behind her. She giggled to herself, the alcohol making her feel warm and loose. She reached behind her back and unzipped her metallic sparkling cocktail dress. It slid down her body with a soft shimmer and pooled at her feet on the floor. Her large voluptuous breasts spilled free, heavy and full. Her dark pink nipples hardened in the cool air of the room. She hooked her thumbs into the sides of her tiny thong and pulled it down her thick thighs. It dropped to the floor, revealing her pretty little tight pussy. The smooth lips were already slightly puffy from the night of dancing and teasing. A hint of wetness glistened between them. Grace sighed and flopped back onto her bed in just her black strappy platform heels. Her thick thighs spread slightly as she lay there, her massive breasts rising and falling with each breath. She rubbed her hands lazily over her body, feeling the buzz from the drinks. The sheets felt cool against her skin. She closed her eyes for a moment, enjoying the quiet of her apartment. Little did she know, something was already waiting under the bed. Grace saw something coiling and sliding underneath her bed comforter. She panicked and felt it through the comforter. It was thick, throbbing, and long. "Oh fuck, what the fuck is that?!" she gasped, her drunk mind struggling to process the horror. Her heart pounded as she pressed her hand against the moving bulge. The thing pulsed hot and alive under her palm, easily as thick as her wrist and stretching several feet long. She yanked her hand back but the coiling mass followed, sliding closer between her spread legs. "Get away! Oh god get the fuck away from me!" Panicking, Grace grabbed the edge of the comforter and lifted it up in one swift motion. There it was. Five feet long of undulating horror. Flesh colored and heavily veiny with a bulbous mushroom shaped head. It flexed hungrily toward her pretty little tight pussy. She panics and shuffles backwards away from it, her heels digging into the mattress as she tried to scramble up the bed. But it throbs and squirms towards her tight pussy, the thick veiny body undulating across the sheets with surprising speed. It pushes its bulbous head firmly against her wet lips. The thick, throbbing tip presses and rubs insistently against her pretty little tight pussy, smearing hot slick mucus and her own arousal all over her swollen folds. She panics and tries to cover her pussy with her hand, pressing her palm desperately over her dripping entrance to block it. "No! Get away you fucker!" she cries out, her drunk voice high with terror. She shoves and pushes at the thick body with both hands, her fingers slipping on the slippery mucus as she tries to shove it back. Her legs kick and thrash, heels digging into the mattress as she scrambles backwards, her heavy breasts bouncing with the frantic movement. But the parasite is too slippery and determined. Its veiny, mucus-coated body squirms and slides right in between her fingers with ease, the bulbous head forcing its way past her futile attempt and popping into her tight opening with a wet "schlup". The thick shaft throbs powerfully as "glurt. glurt. glurt." hot sticky fluid gushes deep inside her in rhythmic spurts, filling her tight channel and making her sopping wet pussy overflow with creamy rivulets that run down her ass. Grace struggles wildly, her thick thighs kicking and thrashing as she tries to close her legs around the invading monster. "Oh fuck no! Stop! Ahhn\~" she cries out, her voice a mix of panic and unwilling moans. Her hands claw and push desperately at the veiny body, fingers slipping uselessly on the slick mucus as it slides deeper. Her heavy breasts bounce with every frantic movement, nipples hard and aching. The blooming heat spreads fast through her core, making her inner walls flutter and clench around the thick intrusion in shameful pleasure despite her terror. Grace's fingers dig hard into the thick veiny flesh, her nails scraping desperately as she yanks backward with all her strength. "Get out you fucking thing! Ahhn\~ nooo!" she gasps, her voice breaking into a high-pitched moan. For a moment she manages to pull the throbbing shaft out a few slick inches, her tight pussy lips stretching obscenely around it as creamy hot fluid squirts out around the seal. But with a wet fleshy "Throb" the parasite thickens powerfully inside her, the ridges flaring and the barbs gripping her clenched walls. It surges forward again, sliding even deeper with a long obscene "schlorp". Her back arches hard in involuntary pleasure, her massive breasts thrusting upward as her pussy clenches greedily around the invading thickness. "Oh fuck... it feels so full... Mmmph\~!" she moans uncontrollably, her body betraying her as waves of hot ecstasy mix with the panic. Grace's massive breasts begin to ache deeply as subtle wet fleshy sounds fill the air. "Schlup... glurt..." The hot liquid from the parasite works its way through her body, causing her heavy tits to very slowly and slightly expand. The skin stretches with a faint, erotic tightness as they grow fuller and heavier, her dark pink nipples throbbing and leaking tiny beads of fluid. "Ahhhnn\~ fuck... mmmph..." she moans uncontrollably, one hand instinctively moving to squeeze her swelling breasts. "Oh shit... ahhn\~!" The sensation is intensely erotic, her tits growing sensitive and heavy as they expand. The thick bulbous head bumps insistently against her tight cervix, "thump... thump... thump..." with each powerful, demanding thrust. The pressure is intense and deliciously obscene, stretching her deepest barrier as her sopping wet pussy squirts in hot, messy jets around the invading shaft at every bump. "Ahhhnn\~! Uhhnn\~ fuck yes... mmmph\~!" Grace moans uncontrollably, her body shuddering in shameful ecstasy. There is no stopping it. Her own greedy pussy welcomes the invasion, clenching and fluttering around the thick veiny length while flooding it with fresh waves of creamy arousal to lubricate its embrace. "Ohhh\~ shit... ahhn\~ deeper... uhhnn\~!" Her hips buck involuntarily, her tight cunt milking the parasite as it prepares to breach her womb. The thick parasite pauses for a moment, its bulbous head pressed firmly and insistently against her tight cervix. Then it begins to release a steady, powerful stream of hot, sticky fluid directly at the entrance of her womb. "Glurt... glurt... glurt..." The thick, creamy liquid seeps and pumps into her most sacred place, flooding her with burning, fertile warmth and further lubricating the tight passage with obscene, slippery excess. "Ahhhnn\~! Ohhh fuck yes... mmmph\~ so hot and full inside me!" Grace moans uncontrollably, her body trembling with raw need. She rocks her hips desperately against the invading shaft, grinding her sopping wet pussy onto it as her inner walls clench and milk the throbbing length. Her heavy breasts bounce with every lewd movement, nipples aching as fresh arousal gushes out around the thick base. The bulbous head presses harder and harder against her cervix, the pressure building to an unbearable, delicious peak until, with a wet, obscene "schlick", it finally forces its way through. Her tight cervical ring is stretched beyond its limit, the intense burning stretch sending electric jolts of raw pleasure-pain through her core as the thick head pops into her womb. The sensation is mind-meltingly full, her deepest walls being claimed and filled in the most intimate, forbidden way. "Ahhhnn\~! Ohhh fuck yes... uhhnn\~ so deep!" Grace moans uncontrollably, her hips bucking wildly as the thick head breaches her womb. Her sopping wet pussy clenches and squirts around the invading shaft in powerful orgasmic waves. She feels something deep and alive shifting and rearranging inside her womb as the parasite continues its relentless, claiming invasion. Her once empty womb pulses and throbs with powerful, rhythmic contractions, the hot sticky liquid and growing mass slowly repurposing her most intimate, sacred chamber into something new, swollen, and deliciously obscene. The parasite now has only two feet of its thick, heavily veiny length still exposed, dangling heavily and throbbing between her widely spread legs as it continues its unstoppable, inch-by-inch push deeper into her body. "Oh god... no please... ahhhnn\~ it's changing everything inside my womb... fuck it feels so wrong!..." Grace moans, her voice trembling with a potent mix of raw fear and helplessly surrendering pleasure. Her body shakes with terror at the profound violation happening deep within her, but the overwhelming, addictive ecstasy forces her hips to rock and grind greedily against the thick invading shaft. It continues its throbbing, pulsing cumming path deeper into her passage with relentless determination. "Glurt. Glurt. Glurt." Thick ropes of hot liquid pump into her, mixing with her own creamy arousal and gushing out of her stretched cunt in messy, obscene streams that soak her thighs and the sheets below. Only a few inches of the thick, veiny shaft remain dangling out of her pussy, the rest buried deep inside her. "Ahhhnn\~! Ohhh fuck it's still cumming inside me... mmmph\~ so much..." Grace moans, her body writhing as the hot flood continues. She squeezes her heavy, sensitive breast hard, pinching her nipple as the last few inches of the thick, veiny shaft drag their way inside her with a final, wet "schluck". She immediately squirts wildly, her pussy convulsing in powerful spasms that force more of the transformative juices to gush out around the base in hot, creamy streams. Her womb now twists and forms something new as the parasite shrinks completely inside her, coiling up while continually pumping more transformation fluid deep into her core. "Ahhhnn\~! Ohhh fuck... uhhnn\~ I'm cumming so hard!" Grace moans uncontrollably, her body shaking with intense pleasure. She looks down in a mix of wide-eyed horror and helpless lust, her breath catching as she can now visibly see her womb twisting and throbbing under the taut, shiny skin of her belly. The upper pubic area visibly throbs in powerful, rhythmic waves, the clear outline of the coiling parasite and the growing mass inside her pulsing and shifting with every heavy beat. The sight is both terrifying and incredibly erotic, her body betraying her completely as fresh waves of pleasure radiate from the visible movement. "What the fuck is happening to me?!" she gasps, her voice breaking into a long moan. "Ahhhnn\~! Ohhh fuck... I can see it moving inside me... mmmph\~" Grace moans uncontrollably, her hands pressing and rubbing against the throbbing bulge as intense, forbidden ecstasy surges through her core. Something thick and powerful in her womb is thickening and lengthening and throbbing with raw, insistent life as the transformation accelerates inside her. The growing mass stretches and reshapes her inner walls in new, intensely pleasurable ways, sending deep ripples of ecstasy through her core with every powerful pulse. She cannot help but finger and rub her used cunt, her fingers slipping easily into her sopping wet, stretched hole as she plunges them deeper and rubs her swollen clit in frantic circles. Creamy fluids and parasite juices coat her hand as she fingers herself shamelessly. "Ahhhnn\~! Ohhh fuck... mmmph\~ make it stop!" Grace moans uncontrollably, her hips bucking wildly against her own hand while the throbbing in her womb drives her closer to the edge. She gasps sharply, her eyes rolling back as she feels the thick mass begin to slide down her birth canal and throb and thicken violently inside her most sensitive depths. Wet, fleshy growth noises erupt with obscene "schlup... glurt... pop... schlrrrp" sounds as it forms, powerful muscle and bulging veins growing and forming on her new slowly emerging growth. The sensation is pure, mind-melting ecstasy, her body surrendering completely to the hot, pulsing transformation. "Ahhhnn\~! Ohhh fuck yes... mmmph\~ it's getting so fucking thick! Uhhnn\~!" Grace moans uncontrollably, her fingers plunging deeper into her dripping cunt as she rubs her swollen clit furiously. It reaches her cervix where an unbearable pressure forms as the growth continues but the decent is stopped by her tight cervix, the pressure building and building until it pops past with a wet "Schlup" her back arches in response. It reaches her tight cervix where an unbearable, delicious pressure forms as the growth continues to swell and demand more space. The thick, throbbing head presses hard and insistently against the tight ring of her cervix, the descent momentarily stopped by her resistant, clenching barrier. The pressure builds and builds relentlessly, the massive growth pulsing with raw power as her sopping wet pussy clenches and squirts hot juices around the thick base in desperate, messy spurts. Then it finally pops past with a wet, obscene "Schlup", the thick head forcing its way through her cervix and into her womb. Her back arches hard in response, her massive breasts thrusting upward as a powerful, shattering orgasm rips through her body. "Ahhhnn\~! Ohhh fuck yes... uhhnn\~! Mmmph\~ so deep and thick!" Grace moans uncontrollably, her body shaking violently with ecstasy as wave after wave of pleasure crashes over her. She feels the thick, powerful growth throb demandingly against her stretched cervix as it descends down her sensitive, fluttering walls. Inch by throbbing inch it gets thicker and fatter and longer inside her, stretching her birth canal in the most deliciously obscene way. She cannot contain herself, her body surrendering completely as she squirts wildly in powerful, messy jets that soak her thighs and the sheets. At the same time she feels her new growth in her pussy cum in unison, the thick shaft erupting with fresh, hot ropes of cum that lather her stretched cunt and drip and gush out around the base in creamy, overflowing streams. "Ahhhnn\~! Ohhh fuck yes... uhhnn\~! Mmmph\~ oh fuck, this can't be happening!" Grace moans uncontrollably, her hips bucking wildly as the dual, mind-shattering orgasms overwhelm her senses. It continues to grow longer and longer, it reaches her slick entrance and her pussy lips bulge obscenely then it retracts and grows thicker then pushes on her pussy lips again barely peeking and showing its drooling slit when it retracts again and grows thicker again. It continues to grow longer and longer inside her sopping wet depths, the thick, veiny shaft extending and swelling with unstoppable power as it finally reaches her slick entrance. Her pretty pussy lips bulge obscenely around the massive, throbbing head, stretching thin and shiny as the growth tries to crown and emerge. The sensation is intensely erotic, her sensitive lips being forced wider and wider in the most lewd way. Then it retracts slightly back inside her, only to grow even thicker and fatter, pushing on her pussy lips again with renewed force. The fat head barely peeks out, showing its drooling slit that leaks hot precum. It retracts again, the thick shaft pulsing visibly under her skin before it grows thicker still, the cycle repeating as the transformation intensifies and her cunt is stretched to its absolute erotic limits. "Ahhhnn\~! Ohhh fuck... mmmph\~ uhhnn\~ so fucking thick!" Grace moans uncontrollably, her fingers still rubbing her swollen clit furiously as she watches the obscene, hypnotic display between her spread legs. Now the mushroom capped shape cock head pushes out all the way, her pussy lips stretching immensely around the fat, flared crown as it finally emerges fully. The sight is incredibly lewd and hypnotic, her tight lips stretched paper-thin and shiny as the massive, drooling head pops free with a wet "schlop". Grace cannot resist and reaches down with both hands, her fingers wrapping around the thick, sensitive head. She rubs and strokes the swollen mushroom cap, feeling the hot, velvety skin and the way it throbs under her touch. Fresh precum leaks from the slit, coating her fingers as she explores her new cock. Then it retreats back in, growing even thicker and fatter and throbbing wildly inside her. After it gestates inside her walls one last time, swelling with even more power, it springs out completely. The sound of growing flesh and muscle fills the air with wet "schlrrrp... pop... throb" noises as the enormous shaft throbs and twitches powerfully. It's so fucking thick, the veiny monster dwarfing anything she could have imagined, pulsing with raw, virile life. "Ahhhnn\~! Ohhh fuck... mmmph\~ it's so big!... uhhnn\~!" Grace moans uncontrollably, her eyes wide with lust as she watches and feels her new cock emerge. She thrusts her hips forward instinctively as the thick head slightly emerges from her stretched pussy, her body craving more of the obscene sensation. She begins to say "oh god please make it s..." when a fresh gush of meaty transformation begins and it floods her core with mind-shattering pleasure. The cock veins bulge visibly under the skin as it thickens further in powerful, surging waves. She cannot take it anymore, she grips it with her right hand. Her hand cannot even fit halfway around its massive, throbbing length as she breaks out into harsh, desperate moans. "Ahhhnn\~! Ohhh fuck yes... uhhnn\~ Mmmph\~ It wont stop" Grace bursts out, her voice raw and broken as she strokes the thick shaft with frantic need. She feels a hot stream making its way up her 16 inch shaft, the pressure building as fresh cum prepares to erupt. Her cock erupts fresh white cum, shot after powerful shot one by one, each thick, ropey blast firing out with incredible force. The hot, creamy loads land heavily on the floor in front of her, splattering loudly as she strokes herself through the mind-shattering orgasm. The sheer volume is obscene, puddle after puddle forming on the floor as her massive futa cock keeps pumping out more and more. "Ahhhnn\~! Ohhh fuck yes... uhhnn\~ cumming! Mmmph\~" Grace moans uncontrollably, her voice raw and broken with pure ecstasy as her body vibrates with every powerful spurt. She rests for a moment, her cock finally letting out its last throbbing spurt of thick white cum onto the floor. Her expanded breasts heave with every heavy breath, her nipples still leaking as her new cock begins to soften slightly. Then she feels it. A wet "squelch" followed by a powerful "Throb". Her cock begins to harden and thicken again, veins bulging as it rises back to full, monstrous erection. This night is far from over. The parasite had made her into an unwilling slut ready to breed and spread the seed to other victims, ready to transform more women into horny, throbbing futas just like her.
Video by u/Additional_Fly_1106
Video by u/Additional_Fly_1106
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