Legacy Protocol Version Beta
Copyright© 2026 by Megumi Kashuahara
Chapter 46B
Science Fiction Sex Story: Chapter 46B - 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
Except for Emiko and Grandma, the experienced mommies of the house, the rest of them were in for a very big surprise.
Never in his life did Kaito ever think a girl that tiny would be so high maintenance.
Emiko had C-cup breasts before she got pregnant. Now she was a Double D and huge. They bought a high-end Medela breast pump because, being so small, Kumiko’s appetite was not that great. She would only drink one breast empty per feeding. Emiko would pump the other one and refrigerate it.
As for engorgement, that was never an issue because Kaito and the girls were eager to help relieve her of the excess. It seemed Kaito and his harem had gained a lactation fetish.
Little did Kaito know that maneuver was definitely not in his best interest.
Kaito, usually able to see things three moves ahead, proved he was fallible. His daddy duty, he found out, was to arise at three in the morning, heat a bottle, change, and feed his precious screaming little jewel.
He did that part right.
Partly right.
He warmed the bottle. He tested it like Emiko had shown him. He settled into the nursery rocker and held Kumiko against his chest while she drank with the complete concentration of a person who had not yet learned the meaning of gratitude.
When she finished, he burped her.
She gave one good, healthy burp.
Kaito waited.
Then she screamed.
And did not stop screaming.
“What’s the matter, Princess?” he asked, rocking her gently. “Why the fuss?”
She never answered. She just kept wailing, screaming like a banshee.
Emiko staggered into the nursery and asked, “Did you change her?”
“Uh ... no. I just heated a bottle and fed her.”
“Boy!” Emiko replied. “She must really love you then. Usually, she will spit out the nipple with a wet nappy. So, change her.”
“Gotcha.”
After laying her on the changing table and getting her onesie unwrapped, Kumiko was suddenly in a much happier mood.
“Why is she now smiling and kicking like she’s swimming a hundred-meter freestyle?” Kaito asked.
“She knows she’s getting a dry diaper on.”
“How does she know that? She’s only three days old!”
“If your jockeys were pissed up and you had two broken arms, would you scream for help?”
“Yeah, but how’d you know?”
“I could tell by her cry.”
“Huh?”
“Her cry. She’s learning three languages, so she only speaks baby at the moment—she cries. She has a cry when she’s hungry, a cry when she needs a diaper changed, a cry when she has gas. They’re all different.”
“It’s simple common sense, Daddy. Would you like to eat in wet jockeys?”
“Point well taken.”
Kaito flipped up her onesie and undid her diaper.
What he saw was the smelliest, sickest-looking mess he had ever seen.
“Oh God! How did someone that tiny make such a big mess? Look at her! It’s all smushed into her tiny crease. It’s everywhere!”
“In case you didn’t know, girls can poop big loads also.”
“Emiko, get over here and take care of this filthy child. You’re her mother.”
“Hold on, Son. You had no issues at all about squirting this child into my belly, did you? Man up and do your duty.”
“But ... but ... what do I do?” Daddy whined like a two-year-old.
“You’d better watch her or—oops, too late. Now she’s got poop on her hand. If I were you, I’d take both of her hands in one of yours, scrape as much off of her into the diaper as you can. Wash her in the sink, then put a clean diaper on her, cuddle your little princess, then put her back to bed.”
Kaito looked down.
Kumiko had one fist in the mess.
Her other hand was reaching for it.
Both feet were bicycling in the air.
“This child has four weapons,” he said.
Grandma appeared in the doorway behind Emiko. She had clearly been awake for at least part of the exchange, because she was already smiling.
“Remember four,” she said.
Kaito looked up. “What?”
“Four moving, squirming appendages. Two hands. Two feet. Babies only lie still long enough to trick you into believing they will cooperate.”
“I am beginning to understand that.”
“When you dress her, you gently hold either both hands or both feet. Whatever you need to keep still at that moment. When you change her, hold both feet together with one hand. Keep the clean diaper ready under her before you open the dirty one.”
“And when she has—” Kaito looked down at the disaster. “—this?”
Grandma nodded toward Kumiko’s waving limbs.
“Sometimes, you hold all four in one hand until you get the worst of the mess cleaned. Gently. You do not hurt her. You only prevent her from redecorating herself.”
Emiko laughed.
Kaito did not.
Not at first.
Then Kumiko kicked both feet together, grabbed one of his fingers with her clean hand, and looked up at him with such perfect innocence that he started laughing too.
“This is not funny,” he said.
“It is very funny,” Emiko told him.
“Not for me.”
“Especially for you.”
By breakfast, the story had gone through the entire house.
Hana came downstairs first, hair still damp from the shower, carrying a laundry basket full of tiny sleepers and blankets.
“Midori said you called Kumiko a filthy child.”
Kaito was at the kitchen counter, washing bottles.
“I did not call her that.”
“You told Mom to get over there and take care of her own filthy child.”
“I was tired.”
“You were panicking.”
“I was conducting a field assessment.”
Midori came into the kitchen with Kumiko resting against her shoulder. The baby was awake now, clean, dressed, and calm after having caused more chaos in one diaper than Kaito had encountered in any situation he could remember.
“She was not that bad,” Midori said.
Kaito looked at her. “You did not see it.”
“I saw the aftermath.”
“You saw the clean aftermath.”
“Wrong. I cleaned up the poop-encrusted changing table.”
Grandma set a bowl in front of Emiko.
“Eat.”
Emiko looked at it. “I’m not hungry.”
“You need to eat.”
“I know.”
“Then eat.”
Emiko picked up the spoon.
No one argued with Grandma when she used that voice.
Hana sat at the table beside Midori and looked down at Kumiko.
“She is so tiny.”
“And high maintenance,” Kaito said.
Kumiko made a small sound.
Hana smiled immediately. “Can I give her a bottle later?”
“Yes,” Midori said before Grandma could answer. “You can. She takes it slowly. Hold her a little upright, and stop if she turns her head away.”
“I know that.”
“You asked yesterday if babies drink cold milk.”
“I was asking because I thought it might be easier.”
Kaito looked over. “That would be easier.”
Emiko gave him a look.
“Fine,” Kaito said. “We heat the bottle.”
Hana reached out and touched Kumiko’s tiny foot.
“I want to learn everything. Feeding, baths, dressing her, all of it.”
“You will,” Grandma said.
Midori adjusted Kumiko against her shoulder.
“We all will.”
Kaito finished rinsing the bottle and set it upside down on the drying rack.
“We already are.”
The first bath happened that afternoon.
Nobody needed supervision. Nobody was afraid to touch a baby. But Kumiko was three days old, slippery when wet, and new enough that everyone wanted to get every detail right.
Grandma filled the baby tub with warm water. Midori checked the temperature with her wrist. Hana laid out the towel, clean diaper, cream, wipes, and a pale yellow sleeper with tiny embroidered flowers near the feet.
Kaito stood beside the counter, holding Kumiko securely.
Grandma began the lesson.
“The most important thing to remember is gently hold her behind her neck. Her neck muscles are very weak and she cannot hold her head up. The best posture is sitting her in the tub or sink at about a thirty-to-forty-degree angle, holding and supporting her behind her neck. Just let her kick or move her hands. If she splashes, that’s okay. Then soap your washcloth and bathe her.”
Everyone listened.
“When you wash her vulva, always swipe downward through her slit—never up. You don’t want to push anything up inside her, maybe a speck of fecal matter, and cause an infection or something. You girls already know that.”
Kumiko’s feet kicked as the warm water touched them.
Then her legs relaxed.
Then her whole little body settled into Kaito’s hands.
“She likes it,” Hana said.
“She likes being warm,” Emiko replied from the kitchen chair. “She lived inside me in warm water for nine months.”
“Same thing,” Hana said.
Midori took the washcloth and gently cleaned one of Kumiko’s arms.
Kumiko tried to grab it.
“Her hands never stop moving,” Midori said.
“Babies are always busy,” Grandma replied. “They have important work.”
“Like pooping on their fathers,” Kaito said.
Emiko laughed into her tea.
Kumiko looked up at her father as if he had said something very interesting.
“Smart ass,” Emiko said.
Hana took the washcloth next.
“Her hair is so soft.”
“I can’t believe the head of hair she has. You can actually brush it,” Kaito said.
“It’s so black it has a blue tint,” Hana added.
When the bath was over, Midori lifted Kumiko into the towel. Hana dried her carefully. Kaito put on the diaper, holding both feet gently in one hand while he fastened it.
Grandma watched him.
“Better,” she said.
Kaito looked up. “Better?”
“You are no longer looking as though you are defusing a bomb.”
“I am still evaluating whether she is one.”
Kumiko kicked once, hard enough to make all three of them laugh.
The diaper discussion continued when Grandma made the grocery list.
Kaito read over it at the kitchen table.
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