DISCLAIMER- This is a work of pure fiction. All characters are over 18 years of age. This story has elements of the extreme side of fantasy, like incest, genetic body modification, futanari, excessive size and fluids, elements of scifi horror and weird hentai stuff. If that isn't your bag, you likely won't enjoy this too much. If so, enjoy!
(I'm not much of a writer, but I'm fairly descriptive and graphic. I'm just making this up as I go along, so ideas and criticism are welcome.)
Chapter 1
2040, somewhere in the cascade mountains. The Coriander family managed to find a way around the global order and secured a private estate through a protection clause, being a national security risk. By this time technology exploded and gene editing was becoming big business, among other hidden technology. Governments were reformed by religious, military and corporate interests Only small pockets of humanity managed to stay free enough to not be integrated into conglomerate entities or enslaved by technocratic civilization. Most of humanity has been enhanced by machinery and very few were not connected to some sort of AI monitored system. Ben Coriander, a high security military asset was able to keep his family safe enough for now...
Nila was tapping away at her computer in the lab when her sisters came walking in, giggling as they usually do.
"What are you two laughing about this time?" Nila asked sarcastically.
"Mom and dad are fucking again." Lina and Luna exclaimed simultaneously. As twins they did that a lot. "We couldn't study in peace," Lina said "So we came to see what our big sister was up to." Luna continued.
"I am testing out this new CRISPR system."
"How does it work?" Luna asked.
"Since most genes have been mapped and traits are tagged, you only have to type in the changes you want to the gene structure then run it through to the RNA sequencer so it can be injected." Nila droned.
"What kind of changes?" Lina asked.
Anything, like hight, hair or eye color, dimensions, to even skills and education, like advanced math or martial arts skills."
"Wait, kinda like that old ass Matrix movie?" Luna chirped.
"Ya, accept way more advanced and can modify the body as well. The only thing I haven't figured out is how to add or regrow limbs. After it's set you just inject the sequence fluid and after a few hours and a heavy fever, your all set."
"So we could add to our martial arts techniques just by injecting it? That's fucking awesome!" Lina stated, wide eyed. "Could we try it out?" Luna asked.
"Uh, sure but it will take a while to prepare the fluid."
"That's OK. It's not like we can do much without our parents making such a racket up there. They fuck like bunnies. It's like, what, their third time today?" Said Lina.
" Ya, if you don't count the round before breakfast.They are on vacation for a week before mom has to go see grandma back in Japan tomorrow morning, so they definitely would go at it the whole time." Said Luna.
"Always been horny for each other. You'd think they would have some decency around their kids." Said Lina.
"Don't see why you two are so bothered by it. You are just as loud when you're going at it." Nila stated.
"No we aren't!" They complained in unison.
"I'm in the room right next to you!" Nila grumbled.
"True. It is really hot hearing them fuck, though. It makes us want to go at it, too." Luna smirked.
"Ya, but we don't have as much free time as they do lately." Lina whined.
Nila said "well, you do have a martial arts competition to go to soon. You could use this time to practice so you are ready for it. It's after mom gets back, isn't it?"
"Ya, but now that our sister can boost our skills, we can wait." Luna said
"It won't be ready for at least two hours, so go do that instead of bother me." Nila retorted.
"Ouch. Fine. What else can you throw in there while your at it?"
"Well, I could increase your flexibility and strength, maybe up your reaction and senses a bit. Everyone else at the competition will likely be enhanced so it wouldn't hurt to cram as much as we can in there so I'll throw in some extra stuff." Nila said
"Nice! Is there any chance you could throw in some, uh, sexy stuff?"
"Like what? A dick?"
"What? No. Wait, you can do that?"
"Yes."
"No thanks. Well maybe not yet. I was thinking bigger tits or something. These B cups are fun but bigger would be more fun."
"But they would get in the way of your routine."
"Eh, you might be right. We were just wondering."
"Tell you what. I'll figure something out and let you know when it's ready."
"Sweet! Thanks big sis!"
The twins kissed her cheeks and sped off to the gym on the other side of the complex.
"Horny little sluts." Nila mumbled to herself.
She looked over her shoulder and brought up the tab she hid when she heard her sisters enter the lab. "If only they knew how depraved their big sister is." She thought to herself. She had lied to them when she said the formula would take two hours. In reality, it only took thirty minutes to prepare it, but she had some other ideas for self enhancement she wanted to try and keep hidden. She finished up the personal formula and ran it to the synthesizer before moving on to the ones for her sisters. When she had finished that, she gave a sigh and opened another tab to the home security cameras. She found her sisters working on their showcase routine and then moved on to their parents room. "Jeez," she thought. "Dad is really giving it to mom."
Her father Leon had her mother Miki leaning over the bed and plowing her from behind. Their size difference was almost comical, with Leon being 6'4" and Miki being 4' 6". He had to lift her feet off the ground to be able to fuck into her, legs dangling as he slid in and out of her tiny pussy while she supported her body on the bed with straightened arms. Nila slid a hand into her pants and played with her hairless pussy as she watched them. She loved watching her parents fuck. She loved that her mom didn't mind it either. Nila was envious of her mom as she thought her dad was the sexiest man she ever had seen. Of course, she didn't see many being confined to a house hiding in the woods in a form of witness protection. But she watched a lot of porn so she had seen some of what societies called sexy as it came to men. It didn't hurt that he had such a huge cock either. At 10" he was a beast and definitely knew how to use it, though Miki had never been able to take more than 7" of it. That is until she gave her parents a little genetic adjustment. Now mom was taking almost all of it. She admired her handiwork and thought of some future adjustments for later after she talked to her mom and dad about it.
Nila brought herself to orgasm quickly and went back to work. She then prepared the syringes for herself and her sisters. After about an she called her sisters on the intercom to tell them it was ready. They came rushing in all sweaty from their workout.