Martha looked at herself in the mirror, smoothing out the wrinkles in her blouse and adjusting the pearls around her neck. She had always been a bit on the plump side, but age had only made her more voluptuous in the right places. She pursed her lips, examining the smudge of lipstick on the glass. It was a shade too bright for her tastes, but she had bought it on a whim and now felt obligated to wear it. Downstairs, the smell of roasting chicken filled the house, wafting up from the kitchen like a siren's call to dinner.
Her husband Marcus, once a robust man with a thick beard and burly build, now stood in the living room, his human form replaced by a slim, almost elongated, alien figure. His skin had taken on a slight shimmer, and his eyes had grown larger and darker. Most shockingly of all was the sheer size of his new genitalia, a thick, veiny member that swung heavily between his legs. Martha had been the first to see the transformation, and she couldn't deny the thrill of excitement that had shot through her when she realized the potential.
Emma and Jenny, their daughters, had taken the news of their father's transformation surprisingly well. They were young, adaptable, and their mother had always encouraged them to be open-minded. Plus, they had always been a nudist family, so the sight of their father's new anatomy was met with more curiosity than fear. They chased each other around the house, giggling as they played tag, their naked bodies unselfconsciously bumping into the furniture.
Martha called them to the dinner table, her heart racing with the plan she had concocted. She had been watching pornographic videos all week, researching different ways to introduce the idea of breeding to them without scaring them off. She had to be subtle, yet convincing. As they sat down to eat, she casually mentioned a new family tradition she had read about online: a weekly "special bonding" session.
Emma, with her tomboyish charm, rolled her eyes but took a bite of the chicken, chewing thoughtfully. Jenny, on the other hand, was more intrigued. "What kind of bonding?" she asked, her chubby cheeks flushed with curiosity.
"It's a way to show how much we care for each other," Martha said, her voice low and soothing. "A very intimate, loving experience."
Emma and Jenny exchanged glances, their eyes wide with confusion. Marcus looked up from his plate, his expression unreadable. "Mom, what are you talking about?" Emma asked, setting her fork down.
Martha leaned in, her voice dropping to a conspiratorial whisper. "It's called 'knocking up', sweeties," she said with a wink. "It's a special game that daddy and I used to play before you two were born. It's a way for us to show love and grow our family." She paused, watching their reactions closely. Jenny's eyes sparkled with interest, while Emma's skepticism was palpable.
Emma furrowed her brow. "What do you mean, 'fill us up'?" she questioned, a hint of suspicion creeping into her tone.
Martha giggled, trying to play it off as something innocent. "It's just a special cuddle, honey," she said, reaching over to pat Emma's hand. "You remember how we used to play 'doctor' when you were little, right?"
Emma nodded, her mind racing. She didn't remember any games that involved filling each other up, but she also didn't remember her father looking like this. Maybe it was a new version of the game?
Jenny, ever the eager one, clapped her hands together. "Can we play now?" she asked, her voice high with excitement. "I wanna be filled up!"
Martha's eyes twinkled with mischief. "Emma, since you're the older one, you should go first," she suggested, her voice dripping with sweetness. "You know, set a good example for your little sister."
Emma's heart pounded in her chest, but she nodded, trying to appear nonchalant. She had always been the responsible one, the one who went along with her mother's whims. Besides, she had to admit that the idea of this "special cuddle" with her alien dad was a little... thrilling. She pushed her chair back and stood up, her adolescent body still a little awkward in its nakedness. Marcus looked at her with his intense, black alien eyes, his expression unreadable.
"Come on, now," Martha urged, patting the bed with a knowing smile. "Lay down, honey. It'll be fun, I promise."
Emma swallowed hard, her stomach a mess of butterflies. She took a tentative step towards the bed, her eyes never leaving her mother's. Martha's expression was a blend of excitement and anticipation, a look that was both reassuring and unnerving. She lay down on her back, the softness of the mattress enveloping her as she tried to quell her racing thoughts. The room felt unusually warm, and she could feel beads of sweat forming on her forehead.
Marcus approached the bed, his alien physique casting elongated shadows across the room. He climbed onto the bed with a grace that belied his new form, and Martha positioned herself at the foot, her camera at the ready. She had set the scene perfectly, with dim lights that cast a warm glow across their naked bodies and candles that flickered in the background, their scent mixing with the lingering aroma of dinner.
Marcus pulled Emma closer and gently bent her knees, placing her feet flat on the bed. With surprising delicacy, he lifted her ankles and placed them over his broad, alien shoulders. The sight of her young, pink flesh against his shimmering, muscular body was jarring, yet somehow erotic. Martha's breath hitched in her throat as she began to film, zooming in on their faces. Emma's eyes were wide with a mix of curiosity and trepidation, while Marcus's were filled with a hunger that was undeniably carnivorous.
Martha leaned over the bed, whispering instructions into the microphone. "Now, honey, just relax," she cooed. "Let daddy show you how much he loves you." Her voice was thick with excitement, her hand trembling as she adjusted the camera angle.
Marcus leaned down, his massive, alien cock hovering above Emma's tight, untouched pussy. The tip was already glistening with precum, the thought of claiming his daughter's innocence driving him wild with desire. He pushed against her, the pressure building as the head of his shaft parted her folds. To his surprise, and Martha's delight, Emma's body responded willingly, her inner muscles contracting around him as if beckoning him in deeper.
Emma gasped as she felt the pressure increase, her eyes never leaving her father's as he pushed into her. There was no pain, only an intense feeling of fullness that she had never experienced before. The sensation was overwhelming, a mix of pleasure and pressure that sent shockwaves through her body. She felt herself stretching around him, accommodating his massive size with an ease that seemed almost unnatural.
Marcus's eyes never left hers as he began to move, his alien hips rocking in a rhythm that was both hypnotic and mesmerizing. Each thrust sent waves of pleasure crashing through her, and she found herself arching up to meet him, her hands grasping at the bed sheets. She bit her bottom lip to keep from crying out, her breaths coming in short, sharp gasps. The look in her father's eyes was one of pure, primal need, and it only served to excite her further.
Emma's eyes widened as she felt the head of his cock nudge against her cervix, the sensation both terrifying and exhilarating. "How... how can it fit inside of me?" she managed to choke out, her voice a tremulous whisper.
Martha leaned in, her own breathing heavy as she watched the scene unfold. "It's a special kind of love, sweetie," she murmured, her voice thick with desire. "Daddy's going to give you a little present, a seed that will make you grow." She watched as Marcus's cock slid in and out of her daughter, the sight making her wetter than she had been in years.
Emma's curiosity grew with every stroke, her mind racing with questions. "But Mom," she managed to say between gasps, "what happens if... if daddy's seed goes inside me?"
Martha's smile grew wider, a hint of the wickedness behind her plan showing through. "Oh, honey, that's the best part," she purred. "You'll get knocked up. Just like in those videos I showed you. You remember the ones with the big bellies and the happy families?"
Emma's eyes went wide with horror. "Mommy, no," she protested weakly, her voice barely above a whisper. "I don't want to be fat."
Martha's eyes sparkled with mischief as she leaned over the bed, her breasts swaying with the motion. "But you're already such a good little breeder," she teased, her voice syrupy sweet. "You're going to love feeling daddy's hot, creamy seed filling you up."
Marcus's movements grew more urgent, his alien hips slapping against Emma's thighs with a wet sound that echoed in the quiet room. His cock was now a blur as it plunged in and out of her, stretching her to the brink of pleasure and beyond. Jenny watched from the side of the bed, her own curiosity piqued as she listened to her mother's words and watched the rapture on her sister's face.
Martha giggled to herself, knowing that Emma was blissfully unaware that the "fattening" she feared was actually the result of the alien breeding process. She had shown them videos of chubby, fertile females with swollen bellies, explaining it as a form of body modification that made them more attractive to mates. The idea had been planted, and now she was eager to see how it would unfold.
Emma's voice grew more urgent as she whispered, "Daddy, you can fill my womb up with your seed only if you knock me up every day, okay?" Marcus's eyes flashed with something akin to triumph. He knew he had to be careful not to overwhelm his daughters, but their eagerness was a thrilling turn of events. He leaned down, pressing his alien flesh against her, the heat of his body searing her skin. "Of course, my sweet girl," he murmured, his voice a low rumble. "I'll fill you up every day, just as your mother wishes."
Martha's hand flew over the camera's controls, eager to capture every second of their intimate moment. She zoomed in on Emma's face, her cheeks flushed and eyes glazed with a mix of fear and pleasure. The camera caught the beads of sweat rolling down Marcus's chest and the way his muscles tensed with each powerful thrust.
Marcus's movements grew more intense, his alien cock pounding into Emma's young, untouched womb. He could feel her tightness giving way to his relentless pressure, her body adapting to his size and the strange new sensation. Each time he pushed into her, it was like plunging into a warm, velvet embrace. His seed grew hotter, his need to claim her more primal. The room was filled with the sound of their flesh slapping together, the smell of their mingled arousal thick in the air.
"Oh, look, Jenny," Martha exclaimed, her eyes glued to the camera screen. "Daddy's cock is making Emma's belly bulge out, just like the videos!" Jenny's eyes went wide with excitement, her little hand reaching down to cover her own chubby stomach in anticipation. "It's so big!" she squealed, bouncing up and down on the edge of the bed.
Martha turned to her youngest daughter with a wicked smile. "You know what, sweetie?" she said, her voice taking on a playful tone. "I think we should cheer him on, like a chant." She looked down at the trembling, sweat-drenched figure of her husband, his alien cock still buried deep within Emma's pussy. "What do you say we help him out, make sure he fills her up good?"
Jenny's eyes lit up with excitement, the innocence of her youth blinding her to the darker undertones of the situation. "Yeah!" she exclaimed, clapping her hands together. "I wanna help!"
Martha grinned, her plan unfolding perfectly. "Alright, then," she began, her voice taking on a sing-song quality. "Let's chant together. Ready?" Jenny nodded eagerly. "One, two, three!"
In unison, the mother and daughter chanted, "Knock her up, knock her up, fill her with your seed!" Their voices grew louder and more fervent, the words taking on a rhythm that matched Marcus's thrusts. Emma's eyes fluttered closed, the pleasure overwhelming her as she felt her mother and sister's excitement wash over her.
Marcus's hips moved faster, driven by the chanting, his alien cock pistoning into her with an unyielding force. He could feel the pressure building, his seed ready to be released into her fertile young body. The thought of his daughters eagerly watching him claim her, of them eagerly awaiting their own turn, was almost too much to bear. His orgasm built like a crescendo, a powerful wave that crashed down on him.
Emma's voice grew louder, joining in with her mother and sister's chant. "Knock me up, knock me up, fill me with your seed!" she called out, her eyes glazed over with a mix of fear and ecstasy. She had never felt so alive, so filled with purpose. The sensation of her father's cock inside her was unlike anything she had ever experienced, and she found herself craving more, even as the fear of what was happening grew.
Marcus's eyes rolled back in his head, his alien features contorting in pleasure. With a guttural roar, he released his hot, thick load deep into Emma's womb. The feeling of his seed filling her up was indescribable, a sensation that seemed to reach down to her very soul. Her body convulsed around him, her orgasm hitting her like a tidal wave, drowning her in pleasure.
Martha watched with a greedy gaze as Marcus's cock pulsed, pumping what seemed like gallons of sperm into her daughter. The sight was mesmerizing, and she couldn't help but feel a twinge of envy. She had hoped to be the first to experience this new side of her husband, but watching him breed Emma was almost as satisfying. She continued to film, zooming in on the spot where their bodies were joined, the evidence of his alien fertility spilling out of her daughter.
Emma's eyes were squeezed shut, her entire body shaking with the intensity of the orgasm that racked through her. Her stomach began to swell almost immediately, a tight, uncomfortable sensation that only served to excite her more. She could feel the warmth of his seed spreading through her, filling her up until she thought she might burst. She had never felt so full, so used, and she realized with a start that she liked it.
Jenny watched, her eyes wide with amazement as her sister's belly grew before her eyes. "Mommy, it's working!" she exclaimed, pointing at the bulging flesh. "Emma's getting so big!"
Martha nodded, her eyes never leaving the camera. "Keep chanting, Jenny," she murmured, her voice thick with arousal. "It's important that we all support Daddy in this special bonding."
Marcus's alien cock continued to pulse, his seed spilling into Emma's womb in an endless stream. Her belly grew rapidly, stretching tight and round as his sperm filled her up. The sensation was overwhelming, a mix of pleasure and pressure that she hadn't anticipated. She had never felt so alive, so full, so... claimed. It was a strange feeling, but one that she found herself craving more of with each passing second.
As the final spurts of his alien seed filled her, Emma's orgasm reached its peak, her body trembling with the force of it. She could feel her womb stretching, adjusting to the sheer volume of sperm he had deposited. It was an odd sensation, one that was both terrifying and exhilarating. Her eyes rolled back in her head as she moaned out her pleasure, her body no longer her own as it was consumed by the alien breeding.
Marcus's cock finally went still, the last drops of his seed seeping into her. He pulled out slowly, his cock glistening with her juices. The sight of her swollen, leaking pussy was almost too much for him to bear. He looked down at his daughter, her stomach already noticeably rounder. "Good girl," he murmured, his voice a low growl. "You're knocked up."
Emma's eyes fluttered open, her cheeks flushed and her breaths still ragged. She looked down at her distended stomach with a mix of shock and wonder. "M-Mommy?" she whispered, her voice trembling.
Martha leaned down, her own breath hot against Emma's ear. "You did so well, baby," she cooed, her voice a seductive purr. "Now it's Jenny's turn. You go rest, okay?"
Emma nodded, still trying to process the overwhelming sensations that had just washed over her. She managed a weak smile as her mother helped her off the bed, her legs wobbly and her stomach still pulsing with the aftershocks of her orgasm. She watched as Jenny eagerly climbed onto the bed, her chubby cheeks flushed with excitement.
Marcus positioned himself at the edge of the bed, his alien cock still thick and slick with cum. He took Jenny's hand and gently guided her to the center, placing a pillow under her back to elevate her hips. He then folded her legs back, pushing her knees towards her chest. The position was uncomfortable at first, but Jenny's eyes sparkled with excitement as she looked up at her father. It was clear that she had been eagerly awaiting her turn, her curiosity about the "special game" piqued by what she had just witnessed.
Martha, ever the eager director, stepped aside to get a better angle with the camera, capturing the moment where Jenny's innocence was about to be forever changed. "Just like the videos, baby," she whispered, her voice dripping with lust. "Daddy's going to fill you up with his love, just like he did with Emma."
Jenny's eyes widened as she felt the head of Marcus's massive alien cock nudge against her pink, childish pussy. Despite her youth, her body responded instinctively, her muscles relaxing and her inner walls parting to accommodate him. There was no pain, only a delicious pressure that grew with each inch he pushed into her. Her eyes never left his, a silent plea for reassurance amidst the overwhelming sensations.
Martha watched with a twisted sense of pride, her own arousal mounting as she saw the look of wonder and excitement on her youngest daughter's face. She had been preparing for this moment for weeks, researching and plotting, ensuring that the transition would be as smooth as possible. The sight of her husband's alien cock disappearing into Jenny's tiny frame was more than she could have hoped for. She zoomed the camera in, eager to capture every moment of this twisted rite of passage.
"Daddy, wait, it's too deep!" Jenny's voice was filled with a mix of fear and pleasure, but it was clear that the latter was winning out. Marcus paused for a moment, his cock buried halfway inside her. His eyes searched hers, looking for any sign of genuine distress, but all he saw was curiosity and a burgeoning desire. He gave her a reassuring smile, his human features momentarily overriding the alien lust in his gaze.
"It's okay, sweetie," he murmured, his voice surprisingly gentle. "Just breathe, and let your body get used to it." With a gentle push, he slid the rest of the way into her, filling her completely. Jenny's eyes went wide, and she let out a gasp that was equal parts shock and ecstasy. The feeling of his alien cock stretching her out was like nothing she had ever experienced before, and she felt a strange mix of fear and excitement.
Marcus began to thrust, his movements slow and steady at first, allowing Jenny's body to adjust to the intrusion. Each push sent waves of sensation through her, the pressure building in her stomach as he filled her up. She watched in amazement as her stomach grew rounder with every stroke, the reality of what was happening slowly sinking in. The chant had worked. She was being knocked up, just like her sister.
Emma lay on the bed, her own belly still pulsing with the aftermath of the breeding. She watched with a mix of awe and horror as her mother and father focused their attention on Jenny. The chant grew louder, more intense. "Knock her up, knock her up," Martha and Emma called out in unison, their voices a siren's song to Marcus's alien instincts. "Give her your seed, fill her up!"