The familiar expanse of gorgeous blue sky and a huge open field greeted the family as they stepped out of the house. Umnara had a very temperate climate and the landscape was perfectly crafted for maximum full-scale residences. The common models of houses on the planet could accommodate up to twenty individuals with their own personal living spaces. Some opted for a communal living style but there were hundreds of possible layouts to meet any needs.
Naibuna's estate consisted of a few buildings, one major residence and several smaller outbuildings. Each one was set in a blocky and bright aesthetic that had been popular when they were built. The long driveway leading to the main road crossed through a border of trees that acted as a privacy fence. The transport shuttle was already awaiting them when the family reached the pavement.
Ekizo skipped along to the door of the vehicle. His white skirt bouncing with each step before he twirled to look at his mother and sister. "Hurry up!"
Eruda ran after him, her snug body harness stretching to accommodate the movement. She collided with her brother in a hug that sent both twins into a fit of giggles. Naibuna sighed with a smirk and waved for the transport door to open. The three of them filed inside and began their short trip to the station. The automated shuttle already knew where to go.
The neighborhood was expansive but very well organized. Dozens of long front driveways connected up to a central road. Each house was unique in some way, designed and built almost entirely by their owners. The process was relatively simple with some architectural engineering and synthesizing bots. Expanding any building or creating new ones was also a fairly trivial matter.
The family saw a few neighbors on the street as they passed. All were familiar faces who the twins waved to as they drove along. Some were jogging or walking their pets, others were traveling to nearby locations or just out to socialize. Most people were dressed scantily with lots of exposed skin. Tight workout gear was obscenely stretched around voluptuous bodies and hard muscles. A few different body mods were on display; some tails, ears, extreme proportions and even a set of feathered wings were visible along the road. Nai hummed happily as she recalled in intimate detail how it felt to fuck each of her neighbors.
The transport shuttle dropped them directly in front of the station. It was a towering monolithic structure with a large ring at it's top. Right on time, a long cylindrical train decelerated on approach and nestled right into the ring of the station. The flying passenger transport was in common use over all of Umnara. It was exceptionally fast, capable of getting to the twin's school nearly on the other side of the continent in under an hour.
"That's our ride, loves. Get moving!" Naibuna ushered her progeny into the building and up the elevator to the boarding area. They made it right on time and were able to enter the high-speed craft with a few other passengers. Some familiar faces and some new. The public transportation system was ingeniously designed to vary people's routes on any given day, providing more opportunity to mix with others from all over the continent. As much as genetic diversity could be artificially created, it was much simpler to just let people mingle naturally and breed with lots of different partners.
The passenger area of the train was a bright and spacious area where all sorts of people intermingled. The walls were lined with hyper-realistic viewing screens that displayed camera feeds from the exterior of the vessel. It gave the very convincing illusion of windows to the outside, like a portal through the dense outer plating of the train. The walls of the tube were lined with a plush couch that extended down the entire length. They faced inward to a padded play area, where many bodies were writhing in pleasure as Nai and her kids stepped aboard.
"Mom, can we go play! Please!" Eruda shook her mother's hand in excitement.
"Just don't get too messy. Okay?" Nai gave her permission and Eru quickly dragged Eki off to look for some new friends. The twins often sought to have sexual encounters together, it was very natural for them. As cute as it was, there were some attachment concerns to address in the future.
Nai found a seat on the long couch while watching her little ones shuffle around the train. Some people propositioned them with loving caresses and gentle words. The duo gave back some cute giggles to their suitors but didn't settle down immediately. Making rounds through the train, the twins flirted and ground against a whole host of people, some much older and bigger than themselves. Eventually Eruda gave in to the sensual loving of a man with slit irises and a woman with very plump proportions. They were in the play area in the center of the train, gently fucking each other when Eruda knelt down to offer them her holes.
The positioning was convoluted and impractical. Just the way people liked to fuck. Most standard positions got boring after the hundredth time. The man was on his back with the woman riding him. She was leaning forward to eat out Eruda's ass while the young girl pressed her moist pussy into the man's mouth. Ekizo watched their coupling for a moment, his hand rubbing his erection under his skirt. Eventually he positioned himself behind the woman and penetrated her thick ass, grabbing onto her wide hips with all his might. The group gently ground together in utter bliss, each of them practically melting into the sexual harmony of the entanglement. Their moans and cries blended with the rest of the passengers'.
Naibuna scanned the crowd, idly curious about who was on the train today. There was a man with an enormous cock receiving oral from three people at the same time. They worshiped the massive slab of meat like a divine gift, caressing his balls and sucking precum from the tip while planting sloppy kisses up and down the shaft. Nai enjoyed the show but was doubtful that most people could take that monster fully. Her own ten inches were above average already, his erect phallus had to be more than two feet long.
Off to another side, a catgirl was being mounted by a large dog. The animal was heavily modified from its ancestral roots, much the same as many other organisms had been since the genetic modification revolution. It was significantly larger and more flexible but also quite a bit more intelligent and easy to train. It's genitalia had also been enhanced and altered to better fit with humans. The catgirl was whining with each of the thrusts she took from his massive doggy dick. Nai wondered if she would get pregnant. Some dogs had a modification to produce semen modeled after their owners own genetic code. It was fun watching a beast rut into a fertile hole and know it was fulfilling the prime directive.
Now with a certain desire, Nai closed her eyes and scanned the train for anyone with the right package. Every person had a public presence on the local network, some identification and basic information that could be seen by anyone within their general vicinity. The exact specifications were left up to the individual; most had their name, age, relationship status, major body modifications, sexual partner preferences, favorite positions and dynamics, as well as if they were willing to breed. Some went as far as to display video highlights of their past sexual exploits and reviews others had left of their abilities.
The search function quickly returned a hit on Nai's query. A younger futa by the name of Ver who had just the right mod. Nai had a mental image of the girl and quickly glanced around. Eventually she spotted her sitting on the opposite side of the train, a little bit further down. The young futa wore a tight-fitting white button-down top that was pulled over her medium sized breasts. It was tucked into a blue skirt that barely reached her mid thigh. Her legs were adorned with loose, over sized socks with colorful patterns and she wore black sneakers on her feet. Her long hair was a bright blonde color with pink streaks, actually dyed pink rather than a type of color changing mod like Nai had.
Ver was idly typing away on a handheld device, a neat relic that some people used just for the aesthetic. Everyone had neural links to interface with whatever technology they needed to. Naibuna sent a gentle nudge through the local network and sure enough, Ver looked up from her screen. She glanced around until she met Nai's eyes. The older futa smirked and leaned back in her seat, spreading her legs. Her muscular body flexed beautifully and her leather jacket opened to almost fully reveal her breasts. Nai let a hand drift to her crotch and idly rubbed the bulge in her tight shorts.
Ver was immediately interested. She licked her lips and stood up. Her skirt draped down, but not long enough to conceal the bright red canine penis hanging between her legs. It was not at all unusual to find people with all sorts of modifications on any given day. There were very few limits to what was acceptable in public, even less so in private. In fact people with more unique and exotic mods often had more suitors gunning for their attention. Nai at one point had both a flared cock head and green scales over most of her body, which had been quite fun for a while.
Wasting no time, Ver sauntered over to where Nai was seated. She threw her mobile device onto the seat, bent forward and placed a hand on each of Nai's knees. The two futas locked eyes and Ver seductively purred; "Hiya gorgeous~ Interested in taking some doggy cock?"
"Mmmm, I think I could be persuaded." Nai's eyes dropped to the appendage swinging between Ver's legs as the girl swayed her hips.
"How's this for persuasion?" Ver confidently grabbed under Nai's knees and pulled her legs up. She pressed her smaller body up against the muscular futa's legs to keep them in place. She then leaned forward and maneuvered her cock to rub up against Nai's bulge, humping her with short but determined thrusts. The two futanari moaned sweetly as their dicks rubbed together creating delicious friction.
"Keep that up baby~" Naibuna reached down to her shorts and grabbed the material around her crotch with both hands. She tore it cleanly down the middle, exposing her hefty balls and slick pussy beneath. Ver growled in primal desire, her cock already at peak hardness and ready to plow. Nai smiled smugly before shifting her hips in the right way, allowing the canine cocked futa to pull back and line up her shot.
The pair howled in pleasure as Ver plunged into the waiting hole. The sexual release was ecstatic for both partners. Nai only occasionally took cock in her pussy so the sensations were all fresh in her mind. Ver had only gotten in a quick fuck with her little sister this morning so she was still pent up. Wild slapping and guttural moans were all that could be heard from the futas as they fucked themselves silly. Ver's short skirt whipped up and down as her ass plowed back and forth, driving the slick doggy dick as deep as possible into Naibuna.
It wasn't as if Nai was a stranger to cock. She'd easily fucked more than two dozen of them just this year. But comparative to the hundreds of holes conquered by her own steel rod in the same time, it wasn't nearly as impactful. Nai had sampled most every kind of modded body in her two hundred years on Umnara. Getting fucked by a cute, young futa with a big canine dick wasn't exactly a novel experience, but it was one that Nai was appreciating in the moment. The slick shaft of the phallus and its tipped head were wildly different than the last few cocks she'd taken. Her pussy clenched as the invader pummeled her insides with pleasure.
"Fuuuuucking~~ Fuck me harder, you bitch!" Nai grunted through the rough pounding she was already receiving. Ver's network information said she loved dirty talk and name calling, something Nai was happy to play with.
"Grhhhhhh!! You stupid fucking cunt, take it!" Ver swung her hips faster to give as much of a rough pummeling as her body could dish out. Her smaller legs rammed into Naibuna's thick thighs with hefty slaps. Several people around the train glanced at the pair of loud futas, cursing and moaning with totally abandon. Several onlookers started masturbating slowly.
Now rock hard and throbbing, Nai tore her erection out of her shorts. The steel hard phallus pointed up to her stomach as Ver plowed into her pussy. Nai wrapped her hand around her shaft and pumped it. She was close to getting off but her two sets of genitals were not linked. She could orgasm from her cock and from her pussy completely separately. The dog cock of her futa partner was stirring up her insides into a lovely release but her own cock was woefully unattended.
Ver closed her eyes and went into a wild rush of adrenaline as her orgasm approached. The knot at the base of her cock swelled menacingly. Nai felt it bump against her entrance and cooed sweetly. "Gonna knot me and breed me? Fill me up with puppy cum? Give it to me you fucking animal!"
That sent Ver over the line. She growled and shoved her knot into Nai's tight hole. Both futas shrieked as their union produced powerful orgasms in both of their bodies. Nai clenched her legs around Ver as her pussy spasmed with a rolling wave of pleasure. Ver gripped the legs of her older partner and panted while she spilled a river of cum deep into the willing hole. Their bodies continued to slowly grind together as they came down from that high. The surrounding patrons gave them commendable nods but otherwise left them be.
Cleaning was hardly necessary, but Naibuna still gave Ver a simple blowjob to lick all of their collected juices off of her softened phallus. The two of them sat next to each other for the rest of the ride and casually chatted about anything at all. Nai's shorts had reformed themselves around her groin, the smart materiel was designed to take all sorts of abuse and the automatically reshape itself back to a default state.
"You know, you're pretty good with that thing." Nai complimented Ver while eyeing her up.
"Thanks! I'm sure you're an ace with your own tool as well." Ver giggled.
"We'll, if you'd like a demonstration..." Nai smirked while leaning in to kiss the younger futa. Before she could, Ekizo and Eruda bounded up to the pair. They were definitely messy, Eru's crotch was glistening wet around the sides of her panties and Eki had some cum on his face but neither was totally unpresentable for school.
"Mom! We're almost there!" Eruda shoved her way in between Nai and Ver, taking a seat and pouting up at her mother.
"Oh, I guess we are. Well, another time then? Feel free to come find me whenever." Nai sent her contact information through the local network to Ver.
"Sure thing, baby." Ver winked at Nai before turning to Eki. "Oh sweetie, want some help with that cum?"
"Yes please!" Eki moved forward to let Ver lick the cum from his face. If it was his own, or someone else's, Nai had no idea. The little boy and futa started to gently make out as Naibuna and Eruda readied themselves to depart the train.
"Okay love, time to go." Naibuna gripped her kid's hands as they walked toward the door of the vehicle. Ver gave the family a cheerful wave as they disembarked.
"She was nice. Did you fuck her mom?" Ekizo asked, unprompted.
Nai grinned as they descended the station tower. "She fucked me actually. I was craving some canine dick."
"Ohhhh, that's fun!" Eruda chimed in.
The trio finally made out of the station and were immediately greeted by the school campus. Several large buildings stretched out in front of them, huge structures that resembled cylinders with wavy surfaces. Behind the station were a multitude of open fields and designated areas for sports. There was everything from a Circut-ball court to a zero-g area for Rvnal. A gigantic pool stretched out in the distance and a few people were already swimming in it.
The central area between the school buildings was occupied by several groups of students and a few parents. Most people had arrived already. 'Well, at least we're not actually late' Nai thought privately. Students of all ages and body types were mingling with one another, waiting on the start of their day. Some hadn't seen each other for a while and there were happy cries of reunion. And quite a bit of fucking.
Naibuna kissed each of her kids foreheads before letting them run off into the crowd. She watched them mingle and find friends. Eruda happily made out with a few kids around her age and Ekizo paired off with a slightly older futa to caress each other sensually. Nai recognized the futa as Yenzl, a recurring crush of Eki's who he spent a decent amount of time with. The two were very cute together and might make things official soon, maybe even today. Eruda paid her brother little mind as she dropped to her knees and began servicing two cocks with her mouth, alternating sucking and stroking them both.
"Naibuna! Good to see you!" Nai turned to see another parent approaching her. Corafline, mother of three current students, two in the same level as the twins, overly friendly but with a kind heart, talkative, has a thing for well-sculpted bodies. Nai quickly ran over her mental system notes about the woman.
"Corafline! Good to see you too, looking lovely as ever." Nai took a second to appreciate the woman's body. She was on the shorter side with a thick body. Her wide hips and plump ass led up to a round tummy and a captivatingly gigantic chest. Each of her breasts was easily twice as large as Nai's head. Her dark skin glimmered with sweat and sexual fluids all over, her only covering was a thin purple g-string that struggled to wrap around her wide waist. Her black hair was tied up in a bun with loose strands gently falling to her face. Her eyes shone with literal amber light, a mod for vibrant bio-luminescence.
"Oh, you! Always with the compliments. You make a lady feel appreciated." Corafline moved in for a hug which Nai readily reciprocated. The two felt up each other's bodies freely, hands roaming to caress every delectable curve.
"But I'm not going to let you forget baby! You promised to knock me up last time we dropped off the kids. I'm cashing in that offer right now." The curvy woman grabbed Nai's bulge and massaged it with a wicked grin on her face.
"Well. I suppose I did, huh?" Nai pulled Corafline into herself and kissed the woman. She did recall some promise of breeding that had been casually struck during the last school drop off. It had been more of a friendly gesture, but there really wasn't any reason to try and back out of it now.
Naibuna stooped down to hitch her hands around Corafline's thighs and pulled her up. Holding the shorter woman aloft was a trivial feat, Nai could easily support two people if the need arose. She continued to make out with her newest breeding partner as she walked them over to a patch of grass that was relatively free of other people. Another man bounced a small boy on his cock just a few feet away, but other than that they were isolated enough.
With practiced grace, Nai set her partner down on the grass and ripped her own shorts open. Her impressive, ribbed cock sprung forward with a powerful aura. Corafline licked her lips and rubbed her massive tits as she got herself comfortable on the soft grass. Nai had fucked her several times before, even given her a few creampies. Though Corafline never directly said it, Nai surmised she had a thing for big, muscular bodies that could pound her into submission. And the futa was more than happy to appeal to that desire.
Getting right to business, Nai spread the legs of the goddess before her and hooked an arm underneath one. She stretched that leg up and then held it to her chest all while sliding in place. With the other hand, she guided her imposing shaft right to Corafline's crotch, just barely covered by that tiny g-string. "Open up baby. Get that pussy nice and fertile for me."
"Come on in, I've got a nice little egg for you to fertilize." Corafline rubbed her lower stomach with one hand and pulled her panties aside with the other. She spread her pussy lips in a welcoming gesture. Naibuna eased herself forward and penetrated her partner. Both women let out a soft groan as they began to copulate. Wet undulations accompanied their lazy pace, letting pleasure overtake both of them completely.
Though breeding was the primary directive of Umnara, there still existed a few safeguards in place to ensure only intentional breeding occurred. Every human, regardless of other mods, had a fertility block on their reproductive systems that could be switched on and off at will. Any time the block was on, insemination was realistically impossible. Any time it was switched off, the chances of pregnancy were as close to one hundred percent as was scientifically possible. Both parties needed to activate their own reproductive systems for anything to work. After all, making babies was a serious decision that required both parents to consent to the act.
In reality, many people simply activated their reproductive systems on a whim. The chance of casual everyday sex resulting in a pregnancy was something that excited a lot of people. It happened quite regularly. Others would gladly spend a day bound and blindfolded in a highly trafficked public place with their systems turned on. Letting anyone who desired to have a go at their body. Still others volunteered their services at a Procreation Center, where they were used as breeding stock for any number of guests and sometimes for modification testing.
Nai flipped the mental switch in her head as she sawed in and out of Corafline's divinely hot and wet hole. She wasn't as tight as Eruda had been, but that was hardly a point of concern. Nai had been inside enough pussies of all types to realize that each of them offered something unique. Corafline's love tunnel was hot and wet, eagerly slurping up the huge invader. The walls massaged her phallus with practiced elegance. Nai pumped most of her length in and out with each thrust, every ridge making a wet pop as it passed the entrance. Corafline mewled happily and shifted her hips so Nai could reach even deeper. "You need to get that monster as deep as possible. Drown my core in baby batter."
"Mmm, it would be my absolute pleasure." Nai gripped the woman's thick leg to her chest with both hands and rammed her hips forward. Corafline gave a short cry at the sudden deep penetration. Nai grinned impishly as she leaned back slightly and let her hips do the work, giving short thrusts as deep as she could possibly get. Given how worked up she had been this morning, only blowing one load, she was confident that she could work up to a powerful orgasm.
Corafline threw her head back on the grass and pulled at her nipples. She gave several husky moans while her cunt was stretched open and plowed deeply. This was far from her first breeding, her several school-aged children could attest to that. Still, it was a special occasion to get knocked up. That heightened the sensations her body was producing tenfold. She adored how Naibuna's ridges felt as they stirred up her insides unlike any other cock. A few tentacles could compare but that was a different sensation entirely.
"Baby, come over here! Naibuna's going to knock me up!" Corafline hazily called out to her husband, Tobard. He was a hulking man with more muscle than even Naibuna. He was wearing a simple chest harness and a set of tights with a hole for his cock to hang through.
"Is that so love? Such a good breeding cow." Tobard knelt at his wife's side with his cock hanging in her face. She stretched forward to take the tip into her mouth. Suckling it like a sweet treat unitll his entire shaft was rock hard. Without missing a beat, Tobard then rammed his entire length down her throat in one swift motion. Corafline choked on the massive man meat as her husband throat fucked her with slow, deliberate strokes. Humans could survive a long while without breath so there wasn't any need for him to stop. She looked like she was enjoying it too.
"Take your time with her. We're in no rush and my wife loves the anticipation of getting knocked up." Tobard casually chatted with Naibuna as they spit-roasted his wife.
"Thanks. She's got great pussy, really pulls me in and massages everything." Nai complimented the woman as she continued to gyrate her cock in and out.
"Absolutely. The boys love double penetrating her. They say their cocks feel great rubbing up against each other inside."
"Mmm, damn that's hot. How many cocks has she taken up her cunt at once?"
"I think just three. That's the most I've seen her do anyway." Tobard moaned as he bottomed out in her throat. He paused and cocked his head a bit. "Oh, I guess the record is four. She just told me over the neural link. All little boys."
"Now that sounds like it involves some convoluted positioning." Nai cracked a laugh.
"Mhm." Tobard gave a minimal response as he shuddered and fired a fresh load of spunk down Corafline's throat. He pulled out of her mouth and she licked her lips.
"Thanks for the meal love. Did the kids get you all worked up?" Corafline teased her husband.
"Yeah. Watching them get around the crowd was titillating to say the least." Tobard gave his wife a kiss and stood up. He wandered over to a nearby bench and sat down to watch the show.
Naibuna, finally ready for a real fuck, switched into a higher gear. She grabbed Corafline's thigh harder and started giving the woman longer, harder strokes. They both got progressively more vocal as Nai's cock pistoned faster. The wet noises of their union overtook the surrounding area. That was soon accompanied by slaps of skin against skin as Nai plowed down into the future mother of her child.
The kids all filed into their respective buildings. They weren't assigned by age but rather skill levels and interests, with some other factors taken into account. When the crowd of parents had also cleared, only a few stragglers were left in the open courtyard. Nai continued to relentlessly fuck Corafline, the two having repositioned to more traditional missionary style. Nai roughly grabbed her impressive breasts and kneaded their mass in various ways, treating them like a stress toy. This caused Corafline to groan and press herself into Nai's clutches. The powerful futa pounded her breeding toy even harder, sending shock waves through the woman's soft body. Her ass in particular jiggled and shook with every swift impact.
Corafline came hard several times during their mating. Her juicy cunt pulsated with pleasure while her whole body shivered. The cries she let out were loud enough to get a few students to look on from the windows of nearby buildings. Nai never let up her pace, continuing to fuck the woman through her orgasms. Her own natural phallic orgasm was approaching, a much more satisfying release than the artificially triggered one this morning. Nai basked in the sensation of being on the edge. Just far off enough to still enjoy the rigorous plowing she was dishing out while being just close enough to feel the imminent release.
"I'm gonna fucking cum. Hnnnngh, I'm gonna knock you up with a cute little baby. Take all my fucking seed!" Nai growled as she finally reached her peak, her cock swelled and exploded with mind-numbing pleasure. Her first shot of fertile cum blasted against Corafline's womb, soaking it entirely. The next two shots filled it up and then the rest leaked out around Nai's cock. The sticky, white substance oozed out of the soft seal that was Corafline's pussy.
Huffing with each breath, Naibuna collapsed onto Corafline. The futa weakly licked and sucked at her lover's tits. The two laid there for a long moment, relaxed and happy with their achievement. There wasn't any doubt if the breeding had been successful. The entire human reproductive system had been overhauled to to provide maximum pleasure as well as to ensure impregnation from even a few drops of semen. When Nai finally pulled out of Corafline, the small river of spunk that flowed out of her hole was more than enough evidence that the deed had been done.
"That was lovely, sugar. Thanks for keeping your promise~ I've been desperate to get knocked up again. I'm sure our baby will be beautiful." Corafline rubbed her stomach and gazed up lovingly at Naibuna.
"Of course. I'd never let a woman like you go without. Let me know when you plan to give birth, I'll be there." Nai leaned forward and gently kissed Corafline. Both of their bodies were sweaty and slid against each other in wonderful ways.
After some final pleasantries, Nai wished the other couple well and they parted ways. Pulling up the official list of her offspring, Nai was pleased to see a new entry with Corafline as the mother. Status: Gestating, 10 minutes. They would be her fifty third child by her phallic genitalia. Nai had only carried six other children in her own womb. She preferred to spread her seed and only let herself become impregnated by people who were special to her. But she loved each and every one of her kids dearly, no matter which set of genitals had helped create them. Her newest progeny would be no different, already she wondered what the little one would be like.
Now free for the day, Naibuna started to actually form a plan. There were only a few things that demanded her attention and they were not immediately pressing. She could take a trip to Ricca's estate on the other side of Umnara. It had been more than a month since she'd seen that part of her family. With that decided, and her shorts now reformed, Nai casually strolled back to the station to catch the next train.