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The Name "Full House" Is Already Taken

Summary:

The turtles have finally settled down and had kids with each other, but can they handle the sexual nature of their children? Should the punishment be "go sit in the corner" or "give me your dildo for a week"? Is it okay to fuck your nephew if he came onto you first? Is it okay to fuck your niece if she gives you puppy dog eyes and says "pleeeaaasseee?"

Maybe they're in way over their heads.

Notes:

Just to make it clear who belongs to who, here's the list:

Mikey + Raph = Mari
Raph + Leo = Kenji
Donnie + Mikey = Delilah
Leo + Mikey = Hana
Donnie + Raph = Darling
Leo + Donnie = Ivory

this is also in order from oldest to youngest

(See the end of the work for more notes.)

Chapter 1: Prologue

Chapter Text

 

2 PM...

During the daytime, their family sleeps. They're on a strict schedule. At 6 PM they get up, eat breakfast, train, learn Japanese, and meditate. Depending on the day, and who needs help with what, they may disperse and do their own things. The younger of the six go to sleep around 5 AM. Their older brothers and sister get to stay up an extra hour. To do what, Hana has no idea. 

All she knows is.. She can't sleep. 

Being in the center of the pile, it's hard for her to wiggle her chubby little self away without getting detected. Especially by her big brother Mari. He hates when they go wandering off when they're not supposed to. He's almost like the head piece of the pile, hugging his younger siblings closer to him. Tucked underneath his armpit, she gags dramatically, then lets her eyes adjust to the dark room. Almost pitch black. 

Almost. 

A sliver of light breaks through the shadows. The door to their shared bedroom has been cracked open. Immediately she sits up, glancing around her tangled mess of a family. Kenji's on the opposite side to her, his shell facing Mari. Down below, Delilah's latched onto one of Mari's legs, hugging Ivory close, and her foot is pressed up against.. where Darling should be. 

Darling's gone. 

Light blue eyes glance to Mari's face, seeing him still fast asleep, mouth open and filling the room with half hearted snores. She carefully sits up, minding the edge of her carapace to not clip against his arm and startle him awake. 

She brings her legs close to her, gripping the edge of the futon to give herself some traction. Slowly, she puts one foot in front of the other, sliding from between Mari and his arm, and quickly replacing herself with a spare pillow. Small, two toed feet plant on the cold concrete of their underground home, and she shivers, quietly escaping to the door. 

Hana exits the room, cracking the door like it was before. She looks down to her left towards their parent's rooms, then down the right, to the ledge of the second floor, and the direction of the lab. She wants to find Darling before Mari wakes up and realizes he's gone. If Mari throws a fit, Kenji will get angry, and they'll fight, and then they'll all get in trouble. She doesn't feel like doing backflips right now!

She pouts, tempted to just go get her dad. Mikey knows how to keep it on the down low. He won't tell Leo or Donnie nothing if he doesn't have to.

Her footsteps patter quietly in the lifeless lair as she makes her way down the hall towards their parents' shared room. There's more light, and it seems to be coming from another cracked door. Maybe Darling wanted to go talk to them too? He probably also couldn't sleep. Where is he..

"Augh..!" 

Hana startles at an odd noise from her parents' room. At first she's worried. That sounded like her momma, Leo! Like he was in pain or something. She rushes quickly to the cracked door to peer inside. From what she can see, the lamp light is on, and Mikey's mostly what's visible on the bed. Daddy wouldn't hurt momma, would he? 

"Fuck..! Fuck...! Mikey!" 

The desperate cries from Leo are much louder, and Mikey shushes him, holding him down by his shell. 

"You're gonna wake up the kids, Leo.." He snickers, then laughs harder, probably at a look Leo threw at him. 

Hana presses her face against the crack as much as she can to see what they're doing. Leo lets out another noise, and a wet, slapping sound quickly reaches her ears. Mikey groans, then makes a rumbly noise in his throat that makes Hana gasp. It resonates with her body in a weird way, making her all tingly and warm.. Just a second ago she was a little chilly after getting out of their nest, but not anymore. 

Leo reciprocates with a higher version of the noise, then goes back to shouting naughty words. She can see Mikey's form from behind, thrusting his hips back and forth, his tail flapping up and down with each movement at the same to each plap plap that only gets louder and faster as time goes on. The bed rocks violently under his ministrations, creaking with each thrust. 

Another rumbly sound, and Hana backs away from the door, pressing her thighs together. It feels really weird down there.. a type of weird she's never felt before. It must be connected to whatever it is that noise is, since the flutter would flare up each time she heard it. She's never seen her parents do that before.. They don't do that in front of her and her siblings. Momma sounds like he's in pain.. but daddy would never hurt him like that!

A hand wraps around her mouth, and Hana's squeal of surprise is muffled when another body presses against hers. She struggles, whips around, and there's Darling, holding up a finger to his lips. 

Despite this, she doesn't keep quiet. "Darly, what're-" 

He shushes her briskly, then points back the way they came. Grabbing her hand, he leads her towards their nest, but walks past the door, continuing until they make it to the bathroom. Hana stumbles a little as she's pulled along. She really, really wants to ask where they're going, but she keeps quiet until he pushes her inside, closes the door behind them, and swallows them in darkness. 

Hana keeps her carapace flat against the door, whimpering nervously at her loss of sight. 

"D-Darling?" She mutters softly, squinting her eyes to see his dark silhouette. It's taking a moment for her eyes to adjust to the change of light. He doesn't move from his spot in front of her, planting his hands on her thighs after a second of searching for them. Hana jumps a little at the contact. It made her stomach lurch, but it leaves her legs all tingly feeling. She whines again as that pressure in her groin returns. "C-Can we turn the light on?" 

"I'm right here, Hana. Nothing's gonna hurt us." Darling mutters to her. She can almost feel his smirk as he says, "You're too old to be scared of the dark." 

Hana scoffs, pouting at him. "I'm six! What do you want from me!" 

Darling giggles quietly. His lips peck her forehead to soothe her hurt pride. She's still pouting, but she'll let his transgression pass for now. She can get him back eventually. Right now though, she wants to know why she was dragged into this dark bathroom. 

"..So.. Why're we in here?" 

"You saw them, right?" Darling asks, his voice all serious all of a sudden. Hana can't pretend to not know what he means. She shifts on her feet again, but Darling squeezes her thighs to get her to sit still, and she tenses at the buzz that shoots up her spine. 

"M-Mommy and Daddy?" She questions, just to make sure. Darling confirms with a, "Yeah." 

"I-I dunno what they were doing, I just.. I was gonna stop-" He stops her before she can ramble away. 

"You're not in trouble, I'm not gonna tell." Darling says. "My ma and pa were doing it too. I knew they would."

Hana's stumped at this, tilting her head in confusion. She whispers, "What do you mean?" 

"It's a thing the adults do. I saw it accidentally one time.. but after a while I could kinda tell when they were gonna do it so.. I went to watch them." Darling explains in a soft tone, avoiding his voice echoing off the walls the best he can. She was standing there, watching Leo and Mikey for quite the moment, and Darling makes a guess. "So you heard the noise." 

Hana bites her lip, then nods. She concludes he probably can't see her, so she answers verbally. "Yeah.. it made me feel funny.." 

A long beat passes between them. He's thinking extra hard. Extra hard about if he should do what he's thinking. "Between your legs right?" He asks finally, and she nods. 

There's another pause for a moment. A hesitation for consideration. If Hana could see him, he'd probably be doing that thing that makes him look a lot like Uncle Raph. The way he furrows his eye ridges when he's thinking. She always thought he looked silly, wrinkling his snout. 

Darling squeezes and relaxes his fingers against Hana's legs. It makes her twitchy, and she wiggles her hips a little, as if doing so would disperse the feeling attacking her whole being. 

She's about to ask him again, but he beats her to the punch. He asks, "You wanna know what I do? When I feel like this?" 

And then she's curious. There's something they can do? To make the feeling go away? It's like her skin's buzzing, belly flipping with energy she has no idea what to do with. Each touch from Darling is like igniting a fire against her nerves, and it's starting to get overwhelming. 

Maybe Darling had adult information, but there wasn't a sign anywhere, or a parent to tell them what they were doing was wrong. Maybe they just hadn't gotten around to teaching them yet! Something that was on the roster that was a little advanced for their age. Would their parents be impressed that they learned it so early? At first she's excited at the chance to prove herself, especially since she's on the younger side, but she grimaces at a thought that crosses her mind. 

"But.." Her lip quivers with an anxious whine. "But it sounds painful.. Will it hurt?" 

"No, it's not." Darling says matter-of-factly. "I dunno how to explain it.." 

He mulls it over for a minute, the easiest way to explain it in a way that makes sense. He doesn't really know what it feels like, other than good. Like, getting their shell brushed good, but not with brushing their shell. 

"I gotta touch you.." He whispers against her. "But you gotta promise not to freak out." 

"Darly, don't tell me not to freak out 'cause then I'm gonna-" 

"Hana I'm serious!" He huffs. She mushes the smile away from her face with the palm of her hand, then nods quickly. "Okay, okay, I won't freak out." 

"Okay.." Darling finally moves his hands on her tingling thighs, going inward, and spreading them apart. Hana gets the message, and allows him to spread her legs, wiggling her feet so he would have access. She inherits a lot of her flexibility from her father, always showing off how she could do the splits, or touch her toes to her head, weirdly enough since she has a shell. She and Mikey are the only ones in the family who can go so far, and she prides herself on that. 

Darling's finger grazes against a part of her crotch that makes her stomach flip with a new intensity, and she gasps. Her hands find his shoulders immediately to squeeze them. 

"It's okay.." Darling reassures her. He's taking it slow so he doesn't overwhelm her. 

"I pay attention to stuff Ma says." He tells her proudly. "This right here is your slit. It keeps all the sensitive parts in." 

Hana shudders as he drags a finger up the defining line of her pussy, whining quietly in her throat. It's always been a very noticeable part of her body. The folds at the bottom of her plastron are thick, just like the rest of her, and it's the reason her dad's always telling her to close her legs. 

"I know that!" Hana huffs at him. She pays attention too! "The hole inside is called my vagina. Yeah, didn't think I knew that, did you?" 

"I didn't say you didn't." Darling shoots back at her. They have a little pouting match in the dark for a moment. 

His fingers slide up into her slit, and she gasps again, a tremor racking her body, and she digs her little fingernails into her brother's shoulders. Darling mutters an, "Ow," but beyond that doesn't try to make her let go. With how much he knows, he expected to get hurt a little doing this. 

"Then you know, since I'm a boy, I have a penis, right?" Darling asks. Hana nods, again forgetting he can't see her. "U-Uh yeah.. I saw one before." 

"Who's?" Darling pauses in his ministrations. The action has Hana a little cranky, and she whines dramatically. "Don't stop, Darly!" 

"Oh, sorry-" He mutters, and gets back to work, dragging his hand against the wetting slit as it begins to part. It's kinda gross, but his penis does the same thing when it's trying to come out, so logically it must be the same thing. 

Hana breathes out in relief, and bucks her hips to meet his hand.

"I-I saw.." She starts, trying to get her mind back on track. "Kenji.. He was in our room.. while were-we were -unh- out.. Talking to himself about.. mommy.." 

"He was touching it.." Hana adds. "It looked.. long.." 

Darling wasn't surprised to hear that, honestly. He's always noticed those weirdly intense stares from his brother to Leo. The adults look at it like Kenji just loves his mother so much, but Darling knows. Kenji acts like he has a crush. He probably does, actually. 

But he'll think about it later!! He finally has the chance to try out what he's been seeing, and that's what he's gonna do. 

"Uhh.. I think you should lay down, actually." Darling pulls away again, and Hana's whines return. Why does he keep stopping! It's making her mad! 

"Darling!" She huffs angrily, and he huffs back, "I'm gonna keep going! Just lay down!" 

Hana slides down the door abruptly, plopping her little bubble butt against the cold tile and crossing her arms. Darling lowers to his knees, feeling around for her location again before finding her shoulder near the door. "Like, lay on your shell." He explains further. Despite her impatience, Hana listens, scooting forward so she's lying on her back. 

From the light under the door, Darling can see the silhouette of Hana making grabby hands, and he snickers, moving forward between her legs, which she has eagerly spread. Her hands fumble as he approaches, but ultimately latches back onto his shoulders, and that beloved hand returns to goad her slit into parting completely, dripping invitingly with a sticky fluid. 

"Feels good.." Hana mumbles out when Darling's hand rubs up and down her exposed sex. The noises she makes reminds her of the ones her mommy made, and she realizes it doesn't hurt. It feels really good

The bump in Darling's plastron has only been getting bigger, stimulated by the feeling of Hana's pussy, and her reactions to him touching it. His own fluids have begun spilling between his legs, and he finally allows, at that moment, for himself to drop down. The young turtle shudders a whine in relief of allowing his pulsating erection to spring free. It's always so hot to the touch, flushed and needy, and dripping with the same stuff that comes out of his slit. He thinks it's the same stuff, he don't know all the technicalities!

His tail wags as his big plan finally starts coming all together, and he says, "I'm gonna put my penis in your vagina, okay?" 

Hana whimpers, kicking out one of her legs as a wave of need washes over her. "Okay.." She agrees, and Darling adds, "I'll be gentle."

He uses his hand for guidance in the dark, the head of his dick finding the underside of his palm right above where he'd paused. It leads him straight to the hole. He reminds himself to warn her. "I'ma do it now.." 

Darling begins to push in, slightly off course, but it's hard not to go straight in a hole. That is, until Hana yelps and tries to jerk her hips away. Darling freezes immediately, frowning big and grabbing her hips. "What?? What's wrong??" 

"It hurts!" Hana cries, trying her best to cover her jewels with her little hands. "It hurts! You said it wouldn't hurt Darly!" 

"It's not supposed to!" Darling argues back. "It never looked like it hurt when my parents do it!" 

"I don't wanna do it if it hurts!" Hana exclaims, shaking her head. There's no reason to do things that hurt you! And he said it wouldn't hurt so he lied! 

Panic shoots through Darling, and he squeezes her hips to keep her in place. "Nononono please, I wanna try it! It doesn't hurt the whole time, I'm pretty sure! Please Hana!" 

Hana puffs out her bottom lip, completely against the idea of continuing. It's like someone was ripping her apart from the inside! How could that possibly feel good! But she could feel Darling begging her. It probably felt good for him.. And she wouldn't lie, after seeing her parents, she does wanna know what exactly it feels like. Her momma was making a lotta noise. It felt bad for her, so she stopped, but her momma kept going. Maybe it does feel good later? Or her momma's just that tough.

She whines in uncertainty. Her pussy twitches and quivers, and there's a part of her longing to feel something inside her again. As much as it hurt, an innate need was momentarily on its way to being fulfilled, and she wants to do it again.. No.. yeah, she's tough, like Mari! She can take it, she's a big girl! She'll do it, then she'll have the knowledge on how to do it properly! 

She nods. "Okay.. okay.." As she begins moving her hands, she says, "I'll try.." 

Darling fist pumps the air in excitement, but quickly breathes out to stay cool. "You're my favorite sister Hana." 

"Yeah yeah." Hana giggles, though the statement did lift her mood some. 

Darling lines up again, the same as the first time. Hana could feel the head prodding at her hole, sitting there, waiting. She tells him she's ready, and that she could do it, and he doesn't wait any longer. 

Pushing in was.. god, Darling can't even describe it. Her little hole is so tight, wet, and hot, all around him. He'd push in faster if there wasn't so much resistance. Hana mutters, "Ow, owowow ow, Darly.." while whimpering in pain, squeezing a fist and shoving it in her mouth to keep herself quiet. It really hurts.. Tears prick her eyes the more he fills her up, and begin to fall after he's halfway done. It burns, and aches, yet the fullness is such a curious feeling, it doesn't hurt as much as the initial pain does. 

She takes shallow breaths, wiping her tears with her knuckles while Darling groans above her. She cries out in pain as he bucks into her, and she reaches out to grab his shoulder again. 

"Darling, wait!" She exclaims. "It still hurts!" 

Darling bites back a pissy argument from being told to stop again and tries to fight the feeling with logic. He can't imagine what it feels like on her end right now. Maybe it really does hurt that bad. She's also taking part in this, and she could just push him away if she wanted to, so he'll wait. 

It's completely different for him. This feels so.. incredible. Better than any hand could do for him. A primal urge in him wants to keep himself inside her, forever, never taking it back out. He needs to move but he can't and it's driving him so insane.

And Hana makes him wait three agonizing minutes until she's sure it doesn't hurt anymore. She clenches around him a couple times, biting her lip and testing with a wiggle of her hips, and Darling doubles over, his hands on either side of her head with his face in her neck. He almost begs her to hurry up and stop hurting until she finally says. "Okay, you can go now..."

Darling's tail wags ten times as fast being given the green light. He tries to focus on what feels right, like how he would thrust into his hand, so he does that, taking short strokes and bucking his hips aimlessly into his sister. Hana takes in a shuddering breath, wrapping her arms around Darling's shoulders and whimpers. He's going so fast!! It feels.. too much.. Her voice leaves her in a choked cry at the foreign shockwaves running through her. 

Darling mumbles words into her neck, trying so hard to replicate that feeling, moaning and groaning against her skin. He thinks back on how his parents were doing it, and how his Ma sounded each time. It wasn't quite the same.. It was more like.. He awkwardly shifts his feet a little bit to get a better stance, then pulls out halfway. How did dad do it.. Oh yeah! He shoves back into Hana as fast as possible, and the result had them both shouting out together. Their voices bounce around the walls of the bathroom, but neither of them decide to care right now. 

Darling does that, going much slower, but harder as he thrusts deep into Hana, who begins sobbing at the onslaught of new feelings washing over her. Their hips plap wetly against each other, juices squirting out of Hana's tight no-longer-virgin hole, and Darling's stomach spasms. They both wail against each other, muffling their little cries into their shoulders as Darling speeds up. His legs hurt, and Hana's hips ache, but something's coming. They can't stop. They can't stop or they'll die. 

It happens. A high pitched thrill vibrates in Hana's chest, and Darling immediately reciprocates, equally as excited. They whine and squeal and cry out between their churrs, and they want nothing more than to hear the sound over and over again from each other. The air gets punched out of them both each time they collide, leaving them panting and heaving in between. Darling has to adjust his knees every few moments with the slipperiness of the floor making him lose his position. 

Darling desperately ruts against her, scooting forward at the knees so he could reach where he needed to go, and it happens so quickly. Hana clenches tightly around him, biting into her brother's shoulder to muffle the shrill scream that leaves her, and Darling goes quiet. His mouth drops open, and his eyes roll back as he empties that hot, white liquid into her little cavern. 

The need has been met.. Hana feels so good right now. Full, like.. full after a good meal type of full. Her nails finally ease up on Darling's shell, and her hands plop down to her sides, smacking sharply onto the tile. Darling collapses on top of her, heavy with the weight of this sex thing that felt just as good as it looked. Man, if it's like that, then why don't they do it all the time? 

The only downside is, they're both so tired after that last part.  It's like their energy was just sucked out of them, leaving them drowsy and disoriented. Maybe that gets better the more they learn how to do it? Whatever.. For now, they'll just sleep like this, curled up against each other and the door. 

 

...

 

knock, knock, knock...

Darling's awoken by the sound of something gently thunking against thick wood. Weird, it sounds the same as if someone was... knocking... 

knock, knock, knock...

"Who's in here?" Ivory's sleepy voice filters through, and Darling's heart leaps into his throat. "I gotta pee.."

He looks down at Hana, who's still sound asleep. His length has retracted back into his slit by now, allowing his sperm to slowly slide out of Hana onto the floor. Thankfully not on carpet, he wouldn't be able to wash that out fast enough. 

"Hold on, Ivy!" He calls to her. His hand smacks at Hana's face, and she wakes up with a snort, looking immediately pissed off and swatting at his arm. "Be out in a minute!" 

They're lucky it wasn't Kenji, or Delilah. Kenji's just mean and would demand he open the door, while Delilah would just whine and complain about how she needs to pee, and force herself inside by sheer annoyingness. Ivory was the most patient of the group by far, which is definitely impressive by her status as the youngest. 

Hana grumbles words that don't become words until Darling pulls her up by her arms. She slumps forward against him, then hisses, shooting her hands between her legs. She whines, "Owwwwaah..!" since her hips hurt so bad. So it hurts before and it hurts after? THERE'S NO WINNING. 

Darling gives her no time to glower at him, since he hops up to his feet, cuts on the light, and begins to fervently swipe wipes from the counter of the sink. Hana's head dips tiredly while he wipes down his plastron, trying to get all of the mess possible off of him. It'd be better if they could shower, but they don't have time for that! 

"Hana!" He whisper shouts. The young girl started to fall asleep again, slowly tipping to one side. "Hana!" He says again, and she jolts back upright, stretching her arms up and over her head with a big yawn. 

"Yeahh.." 

"We have to clean up!" 

"..Mh.." 

"Hanaaa!"

"Okay, okay!" Hana scrunches her face irritably, and slowly climbs to her feet. She keeps her legs awkwardly apart, feeling that same fluid slipping out of her, and she grimaces in disgust. She lifts a leg and plops her foot against the wall to bend down and look at herself.

"Eww.. did you pee in me?" She asks. Darling huffs, a flush coloring his face. "No! It's not pee, it's the other thing!" 

Oh right.. she knew about that. She forgot about it. That doesn't make it less gross!! She keeps her tail up and follows in his steps of wiping herself down. A lot of it dried between her legs and got all flaky. It hurts the way it's peeling off her skin. 

After the wipes have been thrown away and flushed, Hana washes her hands of the sticky feeling. She figured Darling would just leave to go back to their nest, but he stays beside her with that look they give their parents when they're asking-but-not-asking for cookies. 

The young boy clears his throat, fiddling with his fingers in front of him. "Thanks for letting me try this.." He says. Hana doesn't get the chance to even look at him before he pecks her cheek. It stuns her momentarily, and her head swivels in his direction. Darling is already shuffling out of the bathroom by the time she reaches a hand to the spot his lips touched, and Ivory's coming in through the open door. Her little, "Good morning.." Falls on deaf ears as heat rises to Hana's face. That felt way different from any nuzzling or forehead kisses. That was like.. a big kid kiss..