Legacy Protocol Version Beta
Copyright© 2026 by Megumi Kashuahara
Chapter 49B
Science Fiction Sex Story: Chapter 49B - Chapters 1-8 identical to version A A highly submissive 23 y.o. geneticist with an IQ of 150 is manipulated by a rogue government fully reasoning AI who befriends her thru a "friends" site. He creates her a dream android mare. Together they genetically engineer 3 hybrid super human children. With her being the mitochondrial Eve using her & her 2 daughters’ eggs. She’s trapped in a protocol to multiply this colony by the 3 becoming breed slaves for her son creating a living legacy for the AI
Caution: This Science Fiction Sex Story contains strong sexual content, including mt/ft mt/Fa Consensual Romantic BiSexual Science Fiction Robot Incest Mother Son Brother Sister Daughter Grand Parent DomSub Harem Oriental Male Oriental Female Anal Sex Analingus Cream Pie First Facial Lactation Oral Sex Pregnancy Sex Toys Squirting Water Sports Big Breasts Foot Fetish Small Breasts AI Generated
Grandma came back to Timonium on a gray afternoon with rain shining on the airport roads and a suitcase that felt lighter than the one she had carried home to Korea.
The old house was gone now.
Not erased. Not forgotten. But sold. Its rooms emptied. Its keys turned over to strangers who would make their own meals in the kitchen where she had spent forty years measuring her footsteps by someone else’s moods.
The desk and bookcase were already on their way west, insured, crated, and addressed to Emiko’s new office in Montana.
She had expected to feel grief when the plane left Seoul.
Instead, when the wheels lifted and the city became smaller beneath the clouds, she felt only a strange, steady quiet.
There was nowhere she needed to return to. There was only where she was going.
Emiko had remained at Hopkins, caught in a meeting that could not move. She had apologized three times by video call that morning. Grandma had told her, three times, to stop apologizing.
Kaito met her at BWI with Hana and Midori.
The baby was with them.
Kumiko sat in Hana’s arms near the arrivals doors, dressed in soft yellow and staring at the people moving through the terminal with a seriousness that made her look older than seven months.
Grandma saw her before anyone called out.
She stopped.
The baby had changed.
Not in the vague, expected way babies changed over a few weeks. Grandma had seen the pictures. Midori had sent videos nearly every day. But photographs did not show the new strength in Kumiko’s back as she sat upright in Hana’s arms. They did not show the deliberate way she watched the opening doors. They did not show how little her attention wandered.
Hana saw Grandma first.
“There she is.”
The first thing Kumiko did was run into Kaito’s arms and kissing him passionately while Hana and Midori stood by gigging to each other. They both looked at each other and nodded said in unison “Grandma’s gonna get some good lovin’ tonight.”
She moaned into his mouth, “I have longed deeply for your love and touch.”
Kumiko turned at Hana’s voice.
Her eyes moved across the crowd.
Then found Grandma.
For one suspended second, the baby became completely still.
Her hands tightened in Hana’s sweater. Her gaze did not flicker. She stared at Grandma’s face as though she were reaching across the weeks and measuring it against something she had kept intact inside herself.
Then Kumiko made a startled, urgent sound.
She leaned forward so quickly Hana had to shift her grip.
“Grandma,” Hana said softly.
Grandma crossed the remaining distance without feeling her feet touch the floor.
“Oh,” she whispered.
Kumiko stretched both arms toward her.
Grandma took her carefully.
The baby pressed herself against Grandma’s shoulder at once, both hands catching in the fabric of her coat. Then she pulled back and placed her small palm against Grandma’s cheek.
Not a random touch.
Not quite.
Her fingers moved slowly over the line of Grandma’s face, as though confirming something.
Grandma’s throat tightened.
“You remember me,” she said.
Kumiko answered with a bright, breathless burst of babble and caught a fistful of Grandma’s hair.
Midori laughed through tears she tried to hide.
“She has been doing that all week,” she said. “Looking at the door every time someone comes in.”
“She knew you were coming?” Grandma asked.
“She knew someone was coming,” Hana said carefully. “She has been watching every pattern.”
Kaito took Grandma’s suitcase.
“Welcome back,” he said.
Grandma looked at him.
The words were kind. But they still felt too temporary.
She held Kumiko closer.
“Thank you,” she said.
The day Grandma landed, the house let her rest.
No one asked her to unpack beyond the small things she wanted close: her toothbrush, her nightclothes, the photograph from the office drawer, the soft cardigan Kumiko had already caught in both hands at the airport. Hana carried the suitcase upstairs. Midori set a glass of water and a small plate of food on the bedside table. Kaito checked the hall, the locks, the nursery gate, and then checked them again without saying why.
Emiko came home from Hopkins after dark.
She stood in Grandma’s doorway for a long moment before speaking.
“You should be sleeping.”
“So should you,” Grandma said.
Emiko smiled, tired and familiar.
“I missed you.”
Grandma held out her hand.
Emiko crossed the room and sat beside her on the bed, taking it.
For a little while, neither of them said anything.
The house was quiet around them. Somewhere down the hall, Kumiko gave one brief sleepy sound through the monitor and settled again. Grandma turned her head toward it automatically.
“She is all right,” Emiko said.
“I know.”
“You can rest.”
Grandma looked at her daughter.
“I am trying.”
Later, Grandma lay beneath the guest-room quilt and listened to the particular sounds of the Timonium house: the soft sigh of the heating system, a floorboard shifting as Kaito made one last pass through the hallway, the low murmur of Hana and Midori speaking in the kitchen.
For the first time since leaving Korea, she allowed herself to stop.
The house she had sold was gone from her hands.
Montana waited.
The family was here.
And Kumiko, warm and sleeping in the nursery down the hall, was safe.
Several minutes later, her bedroom door opened, Kaito standing in the doorway in a robe. He stepped inside, shut the door,
Kaito crawled into bed with his pretty grandmother, his concubine. He leaned over and kissed her tenderly. She brushed the side of his face and whispered, “I could barely endure our month of separation. Please, please lick me and fill me with you love for me. Even my breasts ache to be suckled.”
He shifted his weight, feeling the coolness of the sheets against his skin before he pressed himself back into her warmth. Her skin smelled of pressed jasmine and the lingering salt of the sea breeze that drifted through the open veranda, a scent that always seemed to anchor him to the present moment
He trailed a line of kisses down the curve of her neck, pausing where her pulse fluttered like a trapped bird.
He paused, his lips hovering just above the swell of her breast, and looked into her eyes.
“You always look at me like I’m a miracle,” she whispered, her voice a low vibration that seemed to echo in the quiet of the room. She reached up, her fingers tracing the line of his jaw with a slow, deliberate rhythm. The soft glow of the bedside lamp cast long, amber shadows across the mahogany furniture, blurring the edges of the room until there was nothing left but the two of them and the rhythmic hum of the air conditioner.
Kaito didn’t answer with words; instead, he let out a long, shuddering breath and lowered his head. He focused on the weight of her against the mattress, the way her body seemed to mold itself to his as if they were two pieces of a puzzle finally clicking back into place. The month away had felt like a decade, a stretch of grey hours spent in boardrooms and sterile hotels, and the sudden return to this intimacy felt less like a reunion and more like a homecoming.
The silence of the room was broken only by the soft, rhythmic clicking of a nearby clock, a sound that usually felt like a countdown but now felt like a heartbeat. Kaito let his lips finally meet the warmth of her skin, the contact sending a jolt of electricity through him that made his fingertips tremble. He lingered there, savoring the softness, feeling the way her breath hitched and then smoothed out into a long, shaky sigh of surrender. The world outside—the city traffic, the demands of his career, the expectations of their lineage—collapsed into a single, shimmering point of focus.
He shifted, his leg hooking over hers to pull her closer, ensuring there wasn’t a sliver of air left between them. He could feel the subtle tension in her muscles, a coiled anticipation that mirrored his own, and he responded by tracing the line of her hip with a slow, possessive pressure.
“You’ve grown impatient,” she murmured, though her hands were sliding down his back to press him firmer against her. She shifted her weight, the silk of her nightgown sliding with a soft, rhythmic hiss against the sheets, a sound that felt louder than the ticking clock as she shifted and removed her nightgown.
Kaito let out a low groan, his forehead resting against the valley of her chest. He could feel the frantic thrum of her heart, a rapid drumming that matched the sudden urgency in his own blood. The composure he had maintained during her long flight home had evaporated, replaced by a hunger that felt visceral and demanding. He began to move his lips lower, tracing the slope of her ribs, his tongue tasting the salt on her skin, while his hand slid down to find the warmth of her thigh.
“My breasts ache to feed you,” she breathed, her voice now a fragile thread of sound that seemed to vibrate in the space between them. “Drink from me, Kaito. Drink of my love until the void of the last month is gone.”
The request wasn’t just a plea; it was an invitation of shared secrets. Kaito shifted his weight, his movements heavy and deliberate, as he captured the peak of her breast. He felt her back arch, a sharp intake of breath escaping her lips as he began to suckle. It was a slow, rhythmic draw, a reclamation of the physical bond that connected them, and he could feel her heart hammering against his cheek, echoing the frantic pace of his own.
She let out a soft, melodic moan, her fingers tangling in his hair to pull him closer, as if she feared he might slip away back into the distance of the city. The air in the room grew thick, the humidity of the night pressing in against the cool flow of the air conditioner, creating a cocoon of warmth that isolated them from the rest of the house. He moved from one side to the other, his tongue tracing the curve of her areola with a patient devotion, savoring the way her skin flushed a deep, rosy pink under his touch.
As he worked, Kaito felt the tension in her body dissolve, replaced by a heavy, liquid languor. The urgency that had driven him upon his return began to mellow into something deeper and more resonant. He paused for a moment to look up at her, seeing the way her eyes were hooded, shimmering with a mixture of longing and contentment. She looked less like the matriarch of a legacy and more like a woman who had been starved of the only thing that truly sustained her.
“You are always so thorough,” she whispered, her voice sounding as though it had been dipped in honey. She shifted beneath him, her legs winding around his waist to anchor him to her. The movement caused the silk of her gown to bunch upward, leaving the pale expanse of her thighs exposed to the cool air of the room, though the heat radiating between their bodies more than compensated for the chill.
Kaito let out a low, humming sound in his throat, the vibration transferring from his lips to her skin. He didn’t stop, his tongue tracing a slow, swirling path around the peak of her breast before he drew her back into his mouth. The sensation of her heart drumming against his jaw grew more erratic, a frantic rhythm that spoke of a hunger that matched his own. He could feel her fingers tightening in his hair, pulling him with a desperate, grounding strength, as if she were trying to pull the very soul out of him and merge it with her own.
A sudden, rhythmic tremor rippled through her thighs, a series of small, involuntary shudders that Kaito felt against his own skin. It was a quiet surrender, the kind of release that didn’t require a scream, just a soft, shuddering exhale and a momentary tightening of her grip on his shoulders. He paused, feeling the warmth of her release bloom against the sheets, a subtle dampness that signaled she had already crossed the threshold into pleasure.
“You’re so responsive,” he murmured, his voice thick, his lips still grazing the peak of her breast.
She let out a breathy laugh, her head falling back into the pillow as she arched her spine. “Do not stop now,” she whispered, her voice strained and urgent. Her hands slid from his hair to his chest, guiding him downward with a firm, insistent pressure. “Move lower, Kaito. Drink of the nectar of my passion. Taste me—all of me—and get your fill of me before you finally fill me.”
Kaito didn’t need further invitation. He slid down the length of her body, his chest grazing her stomach as he navigated the silk that remained of her gown. The air conditioner continued its steady hum, but the cool air felt irrelevant, displaced by the radiating heat of her skin. He paused at the junction of her thighs, the scent of her arousal now mingling with the jasmine, a heady, primal fragrance that made his pupils dilate.
He parted her with a slow, steady pressure of his thumbs, discovering the slick, honeyed warmth that had heralded her release. He leaned in, his tongue tracing the delicate folds with a slow, deliberate rhythm, savoring the salt and the sweetness of her. She let out a sharp, high-pitched gasp, her hips bucking upward in a sudden, instinctive search for more. He didn’t rush; he mapped her with a patient hunger, tasting the depth of her longing, feeling the way her muscles pulsed against his lips in a frantic, rhythmic invitation.
As he drank from her, he felt her fingers dig into the mattress, the fabric bunching under her grip. She was shaking now, a fine tremor that started in her core and radiated outward to her fingertips. Every lap of his tongue was met with a soft, guttural moan, a sound of pure, unadulterated surrender. He could feel the build-up in her, a second wave of intensity that was far more volatile than the first, her breath coming in short, jagged hitches that echoed the frantic drumming of her heart.
He shifted his weight, sliding upward once more to meet her eyes. The amber light of the lamp caught the sheen of moisture on her cheeks and the heavy, dark longing in her gaze. The tension between them had reached a breaking point, a coiled spring of desire that had been winding tighter for thirty days. Kaito reached for the waistband of his own trousers, his movements hurried now, the patience of the ritual giving way to a visceral necessity.
He slid his jockeys down and off in one fluid motion, the cool air of the room hitting his skin for only a heartbeat before he pressed himself back into her. He guided himself to her entrance, the heat emanating from her like a furnace. With a slow, shuddering breath, he pushed forward, sliding into her pussy with a deep, grounding sigh. The connection was electric, a sudden alignment of soul and skin that made the rest of the world fade into a distant, unimportant blur.
They moved together in a rhythm that was as natural as breathing, a slow, deliberate choreography they had rehearsed a thousand times before. He watched her face, the way her eyes closed and her lips parted, her breath mingling with his in the narrow space between them. Every thrust was a reclamation, a way of erasing the distance of the last month, filling the void with the weight of his body and the intensity of his focus.
She wrapped her arms around his neck, pulling him down so their foreheads rested against each other. Her voice was a ghost of a whisper, barely audible over the hum of the air conditioner. “You’re home,” she murmured, her hips tilting to meet his with a desperate, searching urgency. Kaito didn’t answer; he simply tightened his grip on her waist and drove deeper, losing himself in the rhythmic heat of their reunion.
“Yes,” she gasped, the word breaking into a jagged, melodic plea that echoed off the mahogany walls. “Yes, my love ... fuck me.”
The request acted like a catalyst, stripping away the last remnants of Kaito’s restraint. He shifted his grip, his fingers digging into the soft flesh of her hips to anchor her as he increased the pace, the slow choreography of their reunion transforming into something more primal and urgent. The bed frame groaned under the sudden shift in momentum, a rhythmic, grounding percussion that punctuated the heavy silence of the room. He felt her interior tighten around him, a series of involuntary pulsations that mirrored the frantic hammering of her heart against his chest.
“Soon, Kaito ... soon,” she gasped, her voice fracturing into a series of jagged, breathless whimpers. Her eyes were squeezed shut, her face tilted toward the ceiling as if she were trying to breathe in the very air of the room to keep from drowning in the sensation. “I’m going to cum very soon ... please, please fill me!”
The plea acted like a spark to a powder keg. Kaito felt the pressure building behind his eyes, a tidal wave of heat that started in the base of his spine and radiated outward. He abandoned the slow, measured pace of their reunion, replacing it with a fierce, driving intensity. He could feel her walls contracting around him in rhythmic, desperate pulses, her body attempting to pull him deeper, to merge their skin until there was no longer a boundary between them. He groaned into the hollow of her throat, his breath hot and ragged, as he drove himself into her with a singular, focused purpose.
“Now, Kaito! Now!” her voice broke, no longer a whisper but a raw, melodic command that shattered the remaining stillness of the room.
Kaito didn’t hold back. He surged forward one last time, his entire body locking as he drove himself to the absolute depth of her. The world narrowed down to the searing point of contact between them, a white-hot flash of sensation that eclipsed the amber light and the humming air conditioner. He felt her internal muscles clamp around him in a series of rhythmic, desperate spasms—a violent, beautiful welcome—as he finally surrendered, filling her with a deep, shuddering release that felt like the only truth left in the world. He collapsed against her, his forehead resting in the crook of her shoulder, their breaths mingling in a jagged, synchronized chaos.
The request had been a command, and the response had been an eruption. In the wake of that final, driving surge, the silence of the room returned, though it was no longer empty. It was filled with the heavy, synchronized sound of two sets of lungs fighting to reclaim their rhythm. Kaito remained anchored within her, the weight of his body pressing her into the mattress, feeling the lingering aftershocks of her release ripple through her thighs like dying echoes of a storm. The heat between them remained, a thick, humid blanket that defied the artificial chill of the air conditioner.
Slowly, the world began to bleed back into focus. The amber glow of the lamp seemed softer now, the mahogany furniture less like imposing monuments of lineage and more like simple wood and varnish. Kaito shifted his head, pressing a lingering, salt-tasted kiss to the curve of her shoulder. He felt her hand, still trembling slightly, slide up his spine to cup the back of his neck, pulling him down until their lips met in a slow, tasting kiss that tasted of sweat and shared secrets.
“Turn for me,” she whispered, her voice a low, velvet command that vibrated against his skin. “Now, my darling. Lie behind me and enter me from behind. I want to sleep with you inside me, swimming in your seed.”
Kaito complied, the movement fluid and heavy. He shifted his position, the sheets rustling like dry leaves beneath them as he guided her to roll over. She arched her back, her spine a delicate, elegant curve of ivory against the amber light, settling her weight forward until she was draped across the mattress like a fallen petal. The sight of her—the soft dip of her waist and the swell of her hips—sent a fresh surge of heat through him, a second wind that defied the exhaustion of their first peak. He settled himself against her, the warmth of her back pressing into his chest, and slid back into her with a slow, grounding depth that drew a long, shuddering sigh from her lips.
The rhythm changed now, shifting from the urgent reclamation of the reunion to something more meditative and slow. Each movement was a deliberate, heavy pulse, a slow-motion dance that focused on the sensation of fullness rather than the chase of a climax. He wrapped one arm around her waist, pulling her flush against him, while his other hand found the curve of her breast, his thumb tracing the peak he had spent so long worshipping. The air conditioner continued its rhythmic hum, but it felt distant, a ghost of a sound compared to the wet, sliding friction of their bodies and the synchronized thrum of two hearts slowing down in unison.
As the minutes stretched, the intensity morphed into a profound, heavy languor. They didn’t move for a long time, simply existing in the stillness of the connection, the silence of the room wrapping around them like a shroud. Kaito rested his chin on her shoulder, his breath warm against her neck, feeling the way her internal muscles continued to ripple in soft, dying echoes of pleasure. The seed of his release remained pooled within her.
Whimpering like a little girl, she cried, “I love you so. So, so much. Thank you for giving me what I feared I would be never experiencing.”
An hour later, Kaito awoke to his grandmother massaging his cock within her. Her vaginal muscles gently squeezing him, rippling Long the length of his shift. She was asleep and dreaming.
He gently kneaded her breast as she brought him to complete hardness. He just lay there letting her milk his cock on her sleep until he spurred three jets of cum deep inside her. She moaned, the drifted off into motionless repose
~ ~
The next morning, she woke before the rest of the house.
Gray light lay across the guest-room ceiling. Rain tapped softly at the window, not hard enough to wake anyone, only steady enough to make the world outside feel held at a distance.
Grandma dressed quietly and went downstairs.
She expected the kitchen to be empty.
Instead, she found Kaito standing at the counter in dark work clothes, his coffee untouched beside a tablet filled with drone footage from Montana.
The screen showed the compound from above.
The main house stood pale against the dark morning land. The laboratory wing was lit from within. The service road curved toward the hangar, where work lights still shone against the half-finished structure. One drone banked slowly over the tree line, checking the perimeter route before returning toward the gate.
Kaito looked up when Grandma entered.
“You should be asleep.”
“You left me a little mess to clean up,” Grandma said.
He almost smiled.
On the tablet, the drone turned, and the roofline of the house filled the screen.
Grandma stepped closer.
“It looks different every time I see it.”
“It is different every day.”
She watched the camera pass over the nursery windows, then the broad west-facing room where her former husband’s desk and bookcase had been installed for Emiko.
“The desk is there?”
“Yes.”
“And the bookcase?”
“Yes.”
Grandma nodded once.
The screen shifted as the drone descended toward the service road.
Behind them, a soft sound came through the baby monitor.
Kumiko was awake, but not crying.
Grandma turned toward it before the sound came again.
Kaito noticed.
“She has been waking earlier,” he said.
“She is listening,” Grandma replied.
The monitor gave another small burst of babble.
Grandma moved toward the stairs.
Kaito picked up his coffee at last.
“I’ll tell Hana you are up.”
Grandma paused at the first step.
“No,” she said. “Let her sleep.”
Then she went upstairs to the nursery, where Kumiko was already awake in her crib, lying still beneath the moon blanket with her eyes fixed on the half-open door.
When Grandma appeared, the baby’s face changed.
Not with ordinary surprise But with recognition.
Kumiko lifted both arms. Grandma went to her immediately. “Good morning,” she whispered.
Kumiko caught her cardigan in both hand and held on.
The Timonium house felt familiar when they came through the door. Warm, lved in.
Crowded with the gentle evidence of a baby who had become the center of everyone’s routines: blankets folded over the couch, board books stacked beside the rocking chair, a sterilizer on the kitchen counter, small socks in the laundry basket, toys in every room where an adult had once tried and failed to keep them contained.
Kumiko did not settle immediately.
Grandma sat with her on the living-room rug while Hana unpacked the airport bags and Midori carried Grandma’s suitcase upstairs. Kaito took a call in the kitchen, speaking low and briefly with someone in Montana about final deliveries for the laboratory wing.
Kumiko watched him.
Not the way a baby watched a moving person.
She watched the sequence.
Kaito picked up his phone, then he walked to the kitchen, and his voice lowered, he looked toward the winrdow.
Kumiko’s eyes followed each part of it.
Then he ended the call, put the phone down, and reached for his keys.
Kumiko leaned forward.
Grandma felt the movement before she understood it.
“You want him?” she asked.
Kumiko’s gaze stayed on the keys.
Kaito noticed.
He closed his hand around them.
The baby gave a small, frustrated sound.
Hana looked over from the counter.
“She does that whenever he picks them up.”
“She likes the sound,” Kaito said.
“No,” Midori called from the stairs. “She knows you leave after you get them.”
Kaito looked toward her.
Midori shrugged.
“She also knows Hana’s shoes mean outside, and Grandma’s bag means somebody is about to put her down for a nap.”
Grandma looked at Kumiko again.
The baby had turned toward the front door.
“She knows patterns,” Grandma said.
Hana sat down beside her on the rug.
“She notices them faster than we expect.”
Kumiko had found the red-bird book within minutes of Grandma’s return.
It was lying beneath the low bookshelf, partly hidden behind a cloth ball. Grandma did not know how Kumiko had known it was there. Hana said the baby had watched Midori slide it aside earlier that morning while cleaning the room.
Grandma opened the book and settled Kumiko upright between her knees.
The pages were thick, bright, and simple.
Yellow sun.
Green tree.
Gray rabbit.
Red bird.
Grandma turned through them slowly, speaking each picture in a soft voice.
Kumiko watched every page.
When Grandma reached the end, she closed the cover.
Kumiko made an immediate sound of protest.
“All right,” Grandma said, smiling. “Again.”
She opened it.
This time she turned two pages past the red bird.
Kumiko reached out.
Her fingers caught the edge of the heavy board page.
Grandma assumed she was only grabbing at it.
Then Kumiko turned it backward.
One page.
Then another.
She stopped at the bird.
Her palm landed directly on the bright red picture.
Grandma went still.
Kumiko looked up at her.
“You wanted that one,” Grandma said.
Kumiko slapped the page gently with her open hand.
Hana watched from beside them, her expression careful.
“She has done it with the moon book too,” she said. “And the animal book. She turns back until she finds a page she remembers.”
Grandma turned forward again.
Kumiko immediately turned it back.
The red bird appeared.
The baby’s face relaxed.
“She knows it is in there,” Grandma whispered.
“She knows more than that,” Hana said. “She knows where it is.”
Midori came down the stairs and stopped in the doorway.
“What happened?”
“Your niece found her bird,” Grandma said.
Midori looked at the open book, then at Kumiko.
“She did it again?”
Hana nodded.
Kaito came in from the kitchen.
He saw the three women looking at the baby and the book.
“What?”
Grandma pointed at the page.
“She turned backward to find it.”
Kaito watched Kumiko’s hand resting on the red bird.
“She has seen it before,” Hana explained. “She remembered where it was.”
Kaito crouched beside them.
Kumiko looked at him, then back at the book.
He turned the page forward.
Kumiko frowned.
Grandma watched her fingers move carefully along the edge of the page.
Then Kumiko turned it back.
The bird returned.
Kaito did not say anything for several seconds.
Then he looked at Hana.
“Write down when she does that.”
Hana’s eyes softened.
“I already have.”
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