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Katara wanders around in a well heated room in a tall ice spire here in the Southern Water Tribe. Some things have changed quite a lot since the Northern Water Tribe sent emissaries and water benders to help with reconstruction efforts after the war, but largely the tribal traditions have remained the same, including the one Katara now prepares for. She wears a sheer blue robe that leaves nothing to the imagination, she's been freshly shaved, bathed, and cleaned and has been given a bowl of water based lube. Since the tribe is bent on recovering from the war that means they must also replenish their water bender population. A few water benders may move here from the Northern Tribe over time but tribal customs have very specific instructions for how the tribe is supposed to bring about more Southern born water benders. Specifically, any remaining southern female water benders are supposed to mate with the strongest warriors in the tribe and have as many children as possible. It just so happens that Katara is the only female water bender of age and that the greatest warriors in the tribe, the most prevalent and honored from the war, are Sokka and Hakoda, her brother and father. Tribal traditions are sacred here and this isn't the first time a family relationship has gone on to become romantic, especially with how slim the population became during the war, so no one really batted an eye when the elders informed the family of three of their new duties or that these duties would be mandatory for the next 10 to 15 years. With new water bender medical knowledge that would mean about 4 kids each year that would go on to be adopted and raised by other families within the tribe. If at least half of the kids are water benders then Katara would be released from her duties and would be free to choose her own mate and have her own kids, until then she's forbidden from having sex with anyone else and must have sex with the chosen warriors at least once a day until pregnancy is achieved.
As Katara prepares the bed and places out a few warm snacks for this event she can't help but feel fortunate. She's not sleeping with some ugly old man, some arrogant asshole, or some complete stranger. It's two people she loves, two people she would do anything for, and honestly two people who don't look half bad.
She reviews some water bending techniques for the thousandth time. Techniques that enhance fertility, that ensure the production of two eggs at once, that will help her ensure pregnancy, and she can't help but feel herself wetten when the door to this warm room opens and she turns to see her brother and father enter, wearing nothing but their underwear. Each of them swallow a small pill that is meant to keep them hard for at least an hour, to ensure the impregnation attempt goes off without much trouble.
Hakoda looks on with a look of pride on his face.
“Looks like my little girl is all grown up and ready to help the tribe. You're just as beautiful as your mother, you know?”
Katara smiles and looks to the ground shyly at the sudden complement.
Sokka has a look of concern on his face.
“Katara we- we don't have to do this if you don't want to. I don't want to hurt you or Aang or make things weird between everyone or anything.”
Katara smiles and approaches her brother and father. She pulls down their underwear and comes back up to give Sokka a long, passionate kiss before breaking it to reassure Sokka.
“I want this Sokka. I love both of you so SO much and I want to show you JUST how much. If I can help the tribe at the same time, all the better. As for me and Aang, he's an air nomad, remember? They have this idea of free love with anyone who's willing. We might be married now but he's asked if we can keep the relationship open and I agreed. When I left the house this morning he was fucking toph in the living room and wished me luck, he even told me to have fun getting pumped full of cum and to tell him about it later. We might not be able to fuck right now but he's looking forward to masturbating together. I plan on drinking his cum afterwards too, maybe that way one of my descendants will have a better chance of being the next Avatar.”
Sokka looks on, a bit shocked at the blatant pervertedness of his sister and brother in law.
“Oh and I talked to Suki too. She seems to be okay with this, she understands that tradition is important. She was definitely more okay with it when I told her that YOU can still fuck whoever you want. She said something about ‘reclaiming’ you every night when you get home. Lucky stud, you're going to fuck your hot sister then go home and fuck your hot girlfriend.”
Hakoda rests a hand on his son's shoulder with another look of pride on his face.
“That's my boy!”
Sokka beams with pride and looks at Katara and takes off her thin robe.
“Okay. As long as everyone is okay with this then. To be honest I'm glad. I've had an eye for you since we were little.”
Katara smiles and leans in, initiating another kiss.
“Me too, Sokka. At first I thought it was just familial love but then I saw you two changing after weapons practice one day and I knew, I just KNEW, I wanted to have your babies. Now I get that chance and later I get to have babies with the avatar. I'm such a lucky little slut.”
Hakoda places a hand on the side of Katara’s face and caresses her gently as he takes her hand and guides her to the floor.
“Now Katara honey, do you mind getting us started?”
Katara wastes no time and begins by licking the heads of each cock, going back and forth between her relatives. She eventually begins to take her father into her mouth as deep as she can, throating him for just a moment before pulling back and doing the same to her brother.
Sokka looks down at his little sister with hungry eyes and runs a hand through her hair.
“Oh fuck. Katara you've always had a big mouth. Why don't you show us just how big?”
Katara smiles around his cock as best she can before removing herself from it. She repositions her brother and father so that they stand facing each other with her kneeling between them. She then holds their cocks together and opens wide to take both heads at once. She takes them as far back as she can, about halfway down the shafts with the heads filling her cheeks. She licks and swirls her tongue around the heads, mingling their precum together as she gently bobs her head. The men throw their heads back in appreciation of just how talented this beautiful lady is.
Katara pulls off and looks up at her favorite male role models.
“So who gets it first?”
Hakoda helps Katara onto her feet, turns her to face Sokka, and picks her up by her thighs, spreading her legs in the process. He angles himself at the entrance to her backdoor.
“Go ahead son. I'll help keep her nice and wide for you. Katara, would you be a dear and lube us up?”
Without a moment's hesitation Katara bends the lube to her father and brother, although she's sufficiently soaked that Sokka shouldn't really need the lube, but the stuff contains medicine that will further enhance her fertility.
Hakoda then slides slowly into her ass causing her flower to gush with excitement and eager expectation and her voice to grunt out thankfully. Then Sokka lines up and effortlessly slides right into his sister, a delicious moan escaping her lips as she wraps her arms around the back of her brother's head.
Hakoda holds his daughter as securely as he can while he and his son get into a nice rhythm, leaving Katara in a state of constant stimulation, moaning and groaning with each thrust.
Sokka’s breath hitches and he sputters out a warning.
“I-I'm close!”
Katara hugs him all the tighter to her body.
“Please give it to me! I love you so much! I want to feel you pour into me, just fill me up with your cum Sokka!!”
Sokka thrusts as deep as he can and lets loose within his sister's womb. The first shot of the night. Katara feels as her womb begins to fill and finds herself flying over the edge as her first orgasm washes over her.
As Katara comes down from her high Hakoda leans in and speaks softly into her ear.
“Hold onto Sokka tight dear. I'm close and I don't want to waste anything so I'm coming in too.”
Hakoda then repositions and slowly begins to spread and stretch Katara as he joins his son in his daughter's flower. Katara moans and swears and pleads for more as she calls out how much she loves her dad and her brother. Once he's fully within her Hakoda and Sokka pick up a new rhythm and Katara is left a sputtering mess as the only intelligible words that escape her lips are sporadic “I love you’s” peppered with swears and demands for more cum. Both Hakoda and Sokka soon empty out into the beautiful girl at the same time. The stimulation of feeling so full rolls Katara into overstimulation and she can't help but want MORE!
The hour goes on and on like this, creampie after cream pie. Every so often a shot is spilled or misses its mark but by the end Katara is literally gushing cum. At the end Sokka takes a look at the cum that missed its mark, leaked out, or otherwise wasn't directly in Katara's womb and makes a comment.
“Damn shame we couldn't get it all in ya sis.”
Katara smiles as she recovers her strength, slides to the edge of the bed, and water bends the cum that Sokka referred to all together into one massive cum tendril. She then uses the tendril to fuck herself in front of her father and brother as she speaks to them.
“I love you both so SO much that I wouldn't DARE waste a drop of your cum!”
With that she finally uses her bending to put every last drop of cum deep into her womb, making it swell and bulge out.
She smiles and moans sweetly as she cums one final time for the day and places her hand on her expanded womb.
“I’ve done some medical and blood bending to make sure I've got two eggs ready, I've separated your cum to make sure each of you fertilized one egg each. I'll hold this for about an hour before I have to pull it all out to make sure I stay in good health, but hey, at least we can keep doing it for the next few weeks or so until the pregnancy tests come back positive.”
Hakoda speaks up.
“I'm just a little sad it'll be about a year after you deliver before we can fuck again. Oh well. Guess we'll just have to fuck you silly until the delivery. You know I fucked your mother while she was pregnant with both of you. That's probably what gave you such a craving for my cum Katara.”
Sokka smiles as he puts his underwear back on and has a seat with his father at the snack table.
“Well I have DEFINITELY worked up an appetite. Katara if you want anything from the table just say so and I'll come feed you since you're focusing on the bending stuff.”
The three eat up and recover their energy, Sokka gets dressed first to return home to Suki who rides him well into the night. Hakoda stays and helps Katara clean herself up as well as helps her clean up the food, the oils, and the sheets before giving her a long deep French kiss, a slap on the ass, and a wink as he opens the exit door and makes a comment
“Hope you make some pretty kid-blings for yourself. Hope I live long enough to see one of them ride me like you just did.”
Katara returns home herself to find Aang fucking Ty Lee in a frankly impressive position for the circus performer while Toph is passed out and leaking Aang’s cum from her ass and flower while streaks of it still cling to the edges of her mouth. Aang looks up and smiles.
“Hey beautiful! How'd it go? Think you're knocked up?”
Katara smiles.
“Oh definitely, but I'm looking forward to getting filled to the fucking brim for the next week anyway. Mind if I watch you use this pretty slut?”
Aang and Ty Lee smile at each other and answer at the same time.
“Oh not at all.”
Aang looks to Ty Lee.
“Unknot yourself and put your legs behind your head. I'm gonna use you, earth bending style.”
Ty Lee unknotts her limbs and places her legs behind her head and holds them with her hands. Aang then uses earth bending to cuff her ankles and wrists together, lifting her into the air by the cuffs and roughly fucking her like a rag doll. Katara watches this as she sits in a nearby comfy chair and fingers herself. It's not long before Aang bottoms out and blows a load into Ty Lee.
Aang pulls out and watches as Ty Lee leaks with his cum. Katara bends the cum out of both Ty Lee and Toph and forms it into a cum tendril that she then uses to throat fuck herself until she cums, hard. She then drinks down the whole amount. It must have been at least five loads worth, the perks of being married to a person with the sex drive of a hundred past lives.
“Ah ah ah ladies. I'll be the first slut to have the Avatars babies. If you want to get in line you're going to have to wait until my water tribe duties are settled first.” Aang let's Ty Lee out of her position and lays her with Toph on the couch while he and Katara go to bed where they lovingly cuddle one another.
Ty Lee tiredly pouts.
“Oooh. No fair. I wanna be a good whore mommy!”
Katara rolls her eyes and smirks.
“Oh come on. You know you're going to be accepted into Fire Lord Zuko's harem and have plenty of little princes and princesses along with your sister wife May. If it's the rough stuff you think you'll miss I know Toph there will gladly fuck you with a nice stone dick any day of the week.”
Toph, in her exhausted state, simply gives a thumbs up to which Ty Lee responds by cuddling up to Toph.
“I guess you're right, but ya can't blame a whore for fuckin now can ya?”
Katara smiles and shakes her head.
“No, I guess I can't. Well good night girls. I'll see ya in the morning. Try to keep Aang's cum warm for me tomorrow until I can get home, getting railed is thirsty work.”
With that Aang and Katara go to bed where Katara lets Aang in on all the juicy details of her day as they cuddle each other into the loving embrace of sleep. Both dreaming of the day that Aang can finally knock up Katara for the first time of many. After all, once she's repopulated the water benders of her tribe she's going to have to help Aang make a few more free loving air nomads.