A/N:

Beta Read by Nuuo, originally uploaded as part of Chapter 49 of The Oneshot Collection.

For any new readers; this story is by far the most disturbing thing I have ever written, and delves into areas no sensible person would ever wish to picture. Even by the standards of the Loud House and Sin Kids fandom, the content here is notable.

Considering yourself warned and read at your own discretion.


Lisa Loud the Broodmother.

It was a bitterly cold Michigan afternoon, made all the worse as The Loud House was an old and much abused structure that needed constant patching up to avoid nasty drafts. It was also emotionally cold as the final nail into the coffin of one Lisa Loud's hopes was driven in.

"… nah," Luna shook her head as she clasped her hands over her stomach. "This is weird. I don't give a shit what you've got on the table- I don't even care that me an' Sam were thinking about kids. I'm not givin' birth to my own brother's kids!"

The sentiment echoed around the table, the assorted many sisters who had suffered the poke of pregnancy from Lisa's machine all sat resolute save Lynn- who was clearly widened with her own progeny.

One might have been confused as to how this situation came about, for nine (ten if one counted Lola, who had since excavated her issue to Lisa) sisters falling pregnant at once to the same man would hardly be a common occurrence. All the more so when that man was their mutual brother.

That person would be considerably less surprised, if only mildly less puzzled upon learning that Lisa Loud had been the true instigator of the rather unusual incident that had resulted in the pregnancies in question. Namely one where the collective siblings had found themselves in a machine designed to titillate and satisfy their deepest carnal fantasies- all while secretly inseminating (or extracting from, in Lincoln's case) the seed that would grow into their incestuous spawn.

Lisa had insisted that her motivations were rooted in science, and had spouted all manner of clever words to that effect; citing everything from the unknown extent of 'line breeding' in humans with such an array of talents, to the potential of comparing the effect of genetic modifications against a unmodified sibling of the same template as the enhanced subject raised under identical circumstances

Most everyone else however simply believed that Lisa had just cracked under the mental pressure of trying to repress her Loud Libdio, and was now rationalising her breakdown with whatever scientific terminology she could muster to pretend it was all the product of a rational mind rather than her sticky fingers.

Either way, her great experiment seemed to be coming to an early end;

Along with Lynn and Lily, it looked like she was the only one who would be bearing the subjects to 'full fruition' as it were.

"Sorry Lisa, but it seems like you'll have to respect your sisters wishes." Rita Loud nodded firmly. "Their bodies, their choices. Maybe this will finally teach you to respect that."

On some level Lisa understood. Her sibling units had voiced their displeasure of her methods long before they'd achieved adulthood, and long before she'd undergone her scheme to push the boundaries of humanity.

But hadn't her more direct approach paid off? Look at what she had achieved through her lifespan; Cryogenics, a perfect Lie detector and Time Travel were all things she'd cracked before Elementary School!

But it seemed the virtues of progress were unappreciated by her many sisters, who had gathered here with their brother and parents to 'discuss the problem' now that they had all fallen prey to their libidinous leisures and the cost her machine had taken in exchange for satisfying them. Not one of the sisters retained their usual slim figures, though some were further along their developments than others.

And now, after a full hour of verbal roasting, heated debates on both sides that were less exchanges of perspectives but yet more petulant emotional discharges- it seemed that the revelation of their progenies' paternity spelt the end of The Project. She could have lied of course, but it would have caused problems in the long run as the children grew to resemble their 'uncle' more than any of the assumed partners- even if Lola, Lynn, Lily and Lincoln could have been bribed into silence to stop the rest from putting the details together.

And now; of the assorted perverts, only two of her nine sisters were willing to carry the subjects to term.

"I don't suppose emphasising the fact that you all used the machine after Lola and Lynn's condition was established would be of any use?" Lisa bitterly put forward. "You have only yourself to blame for-"

"I thought you would use Bobby's!" Lori snapped. "I mean why the fuck wouldn't you?"

"Sully's for me." Luna nodded. " 'Course, if someone else had just let us know whose jizz went into 'em we might not be here anyway!"

Lynn flushed. "Hey; it was a hard thing to bring up!"

Lola laughed at the thought, "Yeah; 'hi guys, guess what?' " The Model put on her best 'endearing voice' with a flutter from her eyes. " 'I'm having kids! But they're not in me, Lisa's a surrogate and you'll never guess who the Daddy is!'." She flumped down, and returned her usual tone. "Seriously; how do you even get started with something like that!?"

"Well maybe you should have tried a little harder," Luan groaned, shifting uncomfortably with her stomach thicker than the other women's despite her younger incubation. "I wasn't pregnant for maybe a month before I got knocked up with quintuplets! The nurses are already giving me funny looks- and not in the good way!"

"Girls!" Rita intervened, "I know today was very difficult for us all- especially you Luan- but you've made your decisions. Lisa has made hers. It's your responsibility what happens now."

There was silence.

Lincoln looked up from a moment from where he sat, but reverted his eyes to the table, half his face visibly bruised from when Ronnie Anne had found out.

They weren't listening to anything he had to say anyway.

Lisa looked around, seeking some weakness in the features of her opposing siblings that she could use to achieve her goals. But there was nothing to be found; the most was from Leni who could only avert her eyes with a furrowed brow.

Fine.

Plan B it was.

She stood up, table legs scraping against the floor as she did. "Very well; if none of you will incubate The Subjects willingly, I do have an alternative."

The sisters looked between each other in confusion, then back to her. A glimmer of recognition crossed Lola's face and her mouth twitched up in a smirk as she realised what was coming.

Luna took the initiative, with a flat stare and cold tone. "An' what would that be? It'd better be good 'cause after what you pulled-"

"I assure you," Lisa declared with stiff lips. "This solution will satisfy both my own goals and rid you of your 'burdens'."

"Eh?" Luna's eyes narrowed in suspicion. "How come you didn't start with it then?"


Because becoming a human beachball for months on end was no one's idea of a good time, least of all Lisa Loud's.

"Ready Einstein?" Luan's sadistic grin was twisted into something inhuman as the lights of the machine outlined every gradient and curve of her visage. In her hand was a 'nozzle' with a tube attached to a metal box with purple glowing side vents.

Lisa resisted the urge to roll her eyes at her sibling's antics. The family was now gathered in the basement, the entire location now stripped of the usual accoutrements in favour of a number of odd machines with more tubes and what appeared to be a large water mattress that Lisa now sat upon. The scientist's stomach proudly protruded as she was bare save for a thick, sterile and supportive bra and a matchingly unflattering set of bottoms with glinting metal components.

"One moment please," Lisa sighed, before downing a water bottle filled with something neon green. She'd tried to tell them what it was earlier- but Lily interrupted her with 'it's stretchy tummy formula!' and the family chose to remember that instead of her carefully chosen and informative appellation. The scientist made a face as the fluid went down her throat, then settled down to lean back; allowing Luan easier access as her 'condition' made it difficult to manoeuvre the nozzle to the correct position herself.

She quickly pinched a bit of skin near her stomach, and nodded with satisfaction as the skin stretched like a rubber band- before snapping back perfectly as she let go. "Excellent, my 'formula' is acting as expected. Now listen carefully…"

"Should we really be here?" Lynn Sr whispered to his wife, unable to tear away his eyes from his daughter's 'procedure' despite his words.

There was some kind of mesmerising quality to the whole affair, not unlike a car crash. Though this particular disaster in the making would likely have a net positive to the number of lives involved (in quantity if nothing else).

"Absolutely," Rita nodded firmly. "After what she pulled- we have to make sure she actually follows through on her 'solution'."

"I suppose that's fair honey," The Patriarch winced as Luan pulled away Lisa undergarments to expose her very adult naughty bits directly to the world. "But maybe the kids could have just…"

"… and be sure to give adequate warning-" Lisa stopped as Luan murmured something with a tune to it. "Elder Sibling Unit; are you singing?"

Luan looked Lisa right in the eyes with a grin, her voice rapidly climbing in volume. "… You better not Cry. You better not pout! I'M GOING IN DRY!"

"Wait wah- URGHH!" Lisa gasped as Luan suddenly thrust the nozzle into her unprepared nether regions with all the spite a five fold helping of unwilling incestuous pregnancy could induce. "Ohhhh…"

"Yeah, yeah- take it you incest-crazy bitch!" Luan laughed, then reached over to the close by machine, now holding dozens of tubes in the expanded top, and pressed the 'release' button.

Originally the machine had been coded to release all the pregnancies at once through the Nozzle, which is how three of the four current pregnancies within Lisa Loud had been inserted. However now there was a far greater volume of foetuses to consider, and many at different stages- so each would need an individual 'release'.

WHUMP!

The nozzle jerked, and specs of fluid leaked down from between Lisa's legs while the scientist moaned again.

"Yeah, yeah- doesn't feel too good does it Leese?" Luan cackled. "This things' got a bit of kick to him, doesn't he?" She pressed the release button again- holding the nozzle tightly so that the full force of the insertion went straight into the other woman's cervix.

WHUMP!

"ORGHHHH!" Lisa moaned, and this time a little smirk came across her face. "A-are you sure you are performing the procedure correctly Elder Sibling Unit? I think you might-"

WHUMP!

The scientist jerked and gasped, while Luan's own smile grained an edge. "I dunno, did that feel right?"

Lisa's eyes found the elder's again with a challenge. "I must admit that I barely felt anything at all-"

WHUMP!

WHUMP!

"UUUOOOWWW!" A definite gasp of pleasure erupted from the Genius- and Luan's smile froze as she processed that Lisa Loud was in fact-"

"I-is she getting off on this!?" Luna backed away in disgust. "Dudes this is grotty!"

"Oh yeah- she's totally into this kind of thing!" Lily chirped with a smile. "That's probably why she invited us all to watch."

Shudders went around the room as realisation sank in, and Luan's smile turned upside down.

"Uhh," The Comedienne looked up with desperate eyes- "c-could someone else-"

"Not it."

"No way dude.

"No gonna happen!"

"You demanded this Luan," Rita insisted. "Now I know Lisa is-

"Ohhh," Lisa moaned.

Rita facepalmed "Oh for Gods sake; Lisa could you not!"

Lisa's eyes lazily rolled to Rita, then pointedly rolled away with orgasmic apathy.

"Just get this done." Rita threw her hands up, then snapped to a certain stealthy goth trying to sneak away. "And no one's leaving- we have to make sure she actually follows through on this- she needs to live with the consequences of her actions for once!"

"But Mother," the Goth's mouth was twisted a in sour grimace. "Only a few need suffer to be certa-"

"No; all need to suffer!" Rita's eyes twitched and a growl erupted from her throat. "Your father and I are staying to make sure- and the rest of you jumped on that fucking machine to make this happen so you all get to suffer with us!"

Goth's lips trembled for a moment, then she came to a decision.

She strode up to her mother, now easily as tall as the matriarch. Mother and daughter stared each other down (Lisa growing irritable as she was left with cooling metal in a place that it definitely wasn't meant to be).

Slowly, Lucy raised her hands to her face, then parted her hair- revealing two, breathtakingly beautiful blue eyes- the irises the colour of the sky as the light hit them.

"Holey moley..." Lana gasped. "I-I'd only heard but-"

"They're like sapphires!" Lola drooled.

Similar appreciative sentiments circled the room.

"Mother, this is unnecessary." She pleaded with all the sincerity she could muster. "I know we ask much of you, but I must ask again for the sake of-"

"No." Rita folded her arms, utterly nonplussed. "Don't care about the eyes. Saw them when you were born and I've had enough bullshit from you kids for one day, get back in the Trauma Circle and watch your sister knock up your other sister with your brother's babies."

"Dang it," Lucy sighed, letting her hair obscure the wonderous orbs once more as she trudged back to her spot defeated.

Rita eyed her to make sure that she didn't 'disappear', then snapped to Luan. "I don't hear impregnation happening young woman!"

"But Mom!" Luan complained. "I-"

"Don't but Mom me, you came here with Lincoln's babies inside you because you wanted to use Lisa's Super-Sybian!" Rita growled. "Now get those babies inside her or I swear you're leaving with even more kids than you came in with!"

Luan would have raised her objections at the obvious unfairness of that suggestion- but Rita Loud was clearly in Mom Mode and Luan could only swallow as old instincts told her that discretion was the better part of valour.

"Okay Mom." The meek submission peeped through and she reluctantly pressed the 'release' button.

WHUMP!

"Ahhhh!" New colour flushed Lisa's cheeks where the old had faded.

WHUMP!

"OOOOHHHH!"

"A-are we sure this a good idea?" Lincoln put forward, shuddering again at the antics. "She's clearly-"

"Lisa can probably make you a womb to carry some of your own children." Rita sternly overrode him. "Is that what you're asking for Lincoln?"

Lincoln blanched the colour of his hair. "N-no that's-"

"Good-"

WHUMP!

"Because we are all here to make sure that Lisa takes her 'medicine'-"

WHUMP!

"Ghhhewwweeee!"

"-Like a woman," Rita sighed. "And you all used the machine so you all suffer with us. Okay?"

"… Okay."

It didn't take as long as it felt. Only five minutes to transfer all but Lynn's chosen foetus to Lisa's willing womb- their mothers all parting with the spawn under Lisa's offered solution (even Lily, who had to be reminded that she was living under Rita and Lynn's roof so she had to follow their rules- one of which was no incest pregnancies, with the exception of Lisa by necessity). But it felt like hours.

Hours or not though- it was done.

And Lisa Loud looked like she was already nine months pregnant and ready to pop;

The 'stretchy tummy formula' wasn't applied simply because Lisa wanted to test a new invention- the varying foetuses each had their own developmental stages and sizes- and her stomach only had so much space for viable implantation. Add in that she'd needed to accept a measure of fluid to carry each foetus into her uterus and she was thoroughly bloated now.

Something she'd have to get used to- as the first human mother in history to carry over twenty children to birth.

"Holy shit Leese!" Lynn stared at the younger woman stomach. "You sure you can take this?"

"No, does anyone want theirs back?" Lisa dryly replied.

"I-"

"Don't even think about it." Rita sternly countermanded her youngest.

"… Don't…" Lily sighed.

Lisa merely shrugged in acceptance. "Regardless, I shall be assuming a far greater girth in the coming months in order to successfully incubate all of the subjects- and shall be effectively immobile for that duration."

"Tough break dude…" Lana stared around the room.

"Lana she got you pregnant with Lincoln's kids." Lola sniped.

"Oh right!" Lana nodded. "… Yeah, you had this coming."

"Indeed." Lisa sighed. "At the very least I shall have access to rudimentary entertainment and comprehensive care through my devices- if someone would be kind enough to 'hook me up' as it were anyway."

Lincoln felt eyes upon him.

He looked around and sure enough, everyone was looking at him expectantly. "Oh come-"

"I just had to knock her up with all our kids Lincoln," Luan stared at him with haunted eyes. "I don't even know how I'm gonna explain this to Benny. J-just do your bit okay?"

Lincoln looked at the machines, most of which looked like some kind of vertical water heater with hoses attached- and sighed in defeat. Silently he marched over to the nearest one, marked as 'Sanitation' and grabbed the nozzle.

He quickly pulled the thing towards him, allowing the spool to unravel as he sourly slid onto Lisa's water bed.

Lisa pointed to a mechanical slot affixed to her underwear, right where Lincoln assumed her rectum to be.

"These 'undergarments' contain a special port that allows for-"

"Is this a diaper with a hose to suck the nasty stuff out?" Lincoln bluntly asked.

Lisa hesitated. "W-well that's a very simple and incomprehensive summary that disregards all of the innovations that allow for-"

"That's a yes." Lincoln poked the nozzle towards the port, and the thing was pulled in by some magnetic force from his hands. There was an echoing click, and the machine in the corner flashed on.

"Very well," the slightly put off Lisa uttered.

The family stood there awkwardly.

"So… are we done here or what?" Lynn awkwardly put forward.

"Well," Lisa began expositing. "I shall remain here under the care of-"

"Lincoln." Rita declared.

"I- what?" The man in question turned to his mother.

"Lincoln." Rita nodded firmly. "You gave Lisa the opportunity to do all of this, the least you can do is help clean up the mess you helped make."

"But I don't even live here!" Lincoln protested. "From the sound of things, Lisa's not even going to be able to move!"

"From the 'look of things', Ronnie's not going to mind." Rita snapped, and Lincoln felt his face sting in memory. "Your room won't take long to set up again, so unless you feel like paying for a professional to come in and perform all the daily care for your sister who is carrying all of your children- I suggest you get ready to move back home."

As it turned out; Ronnie did indeed not mind.

Lisa in the meanwhile would quickly expand, rapidly reaching proportions akin to an absurd cartoon caricature of an obese person- yet not dying thanks to regular doses of her 'formula'.

Her sisters would occasionally check in to see how she was doing, but their visits quickly stopped in favour of voice chats once she reached the size of a medium elephant, and was mostly a stomach with some limbs and a head attached. Said stomach was constantly moving, alive with a chorus of inbred children seemingly eager to re-enact their progenitor's childhood habits of pushing and shoving while still encased within her flesh- seemingly endowed with a sixth sense that let them know when their paternal progenitor passed by so that they could press their little faces through Lisa's thinly stretched stomach skin to stare at him with sightless eyes.

And all the while, one Lincoln Loud was there. Cleaning her, massaging her swollen joints, enduring her hormonal ramblings and just being very sad in general as countless tiny hands pressed through her flesh to reach for him.