Disclaimer: The Loud House and associated characters belong to Nickelodeon and Chris Savino.

Note: This chapter is a bit longer than usual for me.

Pandora's Box

By LolaPresents

Chapter 14

A young college student awoke that Sunday morning, extremely horny. Her roommate had gone home for the weekend, leaving her alone. All she wanted to do was masturbate, but exams were coming, so she devoted Saturday to studying instead. But with that out of the way, the young woman had until six to pleasure herself. Tossing the covers aside, she got out of bed and fetched her phone from the desk and her duffel bag, which sat beside it.

After entering the restroom, she unzipped the bag and removed a massive penis-shaped butt plug. It was at least twelve inches long and varied in size, from an inch and a half at the tip to well over four inches in diameter at the base, which tapered off sharply into a sturdy suction cup. She affixed it to the toilet seat and applied a healthy slathering of lube before undressing, turning around, and spreading her cheeks. Closing her eyes, the girl lined up and slipped the enormous dong inside her.

It took several moments to accomplish, moving up and down, gyrating her hips as she inched toward the base. It had been so long since she'd gotten to exercise her butt that it had tightened up a bit. But that didn't stop her. She kept groaning with her eyes closed until her anus closed fully around the base, leaving only the suction cup exposed. And, now that her bum rested comfortably on the toiler cover, she took a deep breath and reached for her phone.

"Finally..." she muttered, shaking her hair from her face while rubbing her clit with her free hand. "Time to enjoy some alternative porn!"

However, the first thing she noticed upon waking up her phone was an unread email. Wondering if it were from her family or her boyfriend, she brought up the reader. Surprisingly, it wasn't from a familiar sender, and she almost marked it as spam and deleted it. Luckily, she opened it to find it was an invitation to a prestigious, private porn site. None of the sample images showed the participants' faces, but guessing their ages, she eagerly downloaded the client app and signed up.

Upon punching up the first video, however, her face went blank before turning a thousand shades of red. The children she now watching fucking each other were her younger siblings, but it was so damn hot she couldn't stop frigging herself. With the massive faux cock bloating her belly and her nub stimulated beyond anything she'd ever experienced, she continued through all the current videos before setting her phone aside.

Then, with her ass fully dilated, she spread her legs for balance and began rising and falling against the large object until she came for the sixth time. Finally, she sat back down with the implement inside her and leaned back against the water tank, letting her body relax. She had classes on Monday, and exams started later that week. But studying was no longer on her mind. Lincoln's unusually large cock and sisters' tight twats dominated her thoughts.

"Fuck it..." she murmured. "I'm going home to get me some," she added a moment later. "I have a few sick days I can use. As long as I'm back before exams..."

Part of Rita's introductory speech to every kid who joined her in the making porn was emphasizing discretion and maintaining a sense of normalcy. Though it was risky beginning with the younger ones, they were surprisingly natural at it. The past few days went entirely smoothly, with no issues whatsoever. It was almost as if they were born for the job. And, to a degree, they were. All Rita had to do was train them a bit when they were younger and instill a love for sex.

Likewise, Sunday morning came and went without a hiccough, ending with Lincoln sitting at the kitchen table by himself, eating his favorite sandwich, a side of chips, and a glass of soda. As he was finishing up, his older sister, Lynn, entered and attempted lunch as he ate. However, she had little appetite and held her stomach while staring at her food. For all intents, it looked as though she was cramping.

"Uh, are you alright?" Lincoln asked his athletic sister, who moved her plate to the side and rested her head on the table.

"No," she muttered, turning her head to face him. "Not really. I have a game tomorrow," she explained.

"Oh," acknowledged her brother, still not quite understanding. "Are you nervous about winning?"

"What?" spat Lynn, narrowing her eyes. "No... you know I can't go number two until I'm number one!"

Lincoln cocked one brow as he studied her anew. It had always been her way to retain until after winning a game. But, for the first time, he began to wonder why.

"Listen," Lincoln led. "I don't mean to pry, but why do you do that? It seems rather uncomfortable."

Of course, he hoped for a more controversial confession than she offered. Still, it was a springboard to further questioning. "It helps me concentrate," she told him indignantly. "If I can hold back, then I can do anything."

"That's stupid," declared Lincoln, folding his arms on the table and resting his head inches from Lynn's face. "You know what I think? I think you enjoy the way it feels, and after winning, you get the ultimate reward when you finally get to sit down and feel it all rush out."

"Wha..." sputtered Lynn, her eyes darting everywhere but at him. "That's..."

The fact she didn't immediately deny the charges against her told the horny young man all he needed to know. It had been a gamble. But, had he been wrong, she only would've pulverized him, and he could live with that. However, he capitalized on her hesitation.

"I mean..." Lincoln shrugged, staring into her eyes. "I like it myself, among other things," he admitted, playing his hand. "After what Mom did to us as babies, it's only natural we grew up a little weird," he whispered.

"You..." stammered Lynn, unsure how to respond. "You remember that?"

"Mmhm," lied Lincoln. He had no memories of those times, but his mother's tale made sense, so he went with it. "Best two years of my life."

Slowly, a genuine smile crept upon Lynn's face as she reached out and ran her fingers through Lincoln's hair. "Me too," she mouthed.

"Well," sighed Lincoln, returning her smile. "With that out of the way, I must tell you..." he began, testing the waters and alluding to something more. "Since we're already messed up, I'd like nothing more than to fuck you in the ass while you go. But that'll have to wait until after you win. If you're game, I mean."

Lynn's eyes bugged out of her head. "If only it were that easy," she sighed longingly. "It would make a huge mess, and if anyone saw us coming out of the bathroom, it'd be curtains for both of us."

"So, you're in?" Lincoln said, continuing to keep his voice to a low whisper despite his growing excitement. "As long as we find a way not to get caught?"

"I guess..." Lynn replied, shrugging her shoulders. "But how?"

Lincoln raised his head slightly, reached over with one arm, and gently rubbed her upper lip with his thumb. "Don't worry about that," he encouraged her. "I have something to tell you..."

Shortly after lunch, an old familiar red convertible pulled up in the driveway, depositing one irate Lori. Briskly walking up to the front door, Lori entered like she owned the place and looked around with furrowed brows, her phone in hand. The only one that seemed to be present was her little sister and star of the first video she watched, Lola. Cutting her eyes at the little girl, the corner of her mouth twitched.

"Where's Mom?" she questioned, long before Lola could register her presence.

"Uh..." mumbled the stunned girl, not expecting her eldest sister home anytime soon. "Her room. I think," she offered, pointing over her shoulder as she watched cartoons like any normal seven-year-old.

"Thanks," replied Lori as she sped toward her parents' bedroom. Only something caught her eye, and she stopped, staring at Lola's distended abdomen. "Are you gaining weight?" she asked absent-mindedly.

"Maybe a little," Lola responded, patting her belly proudly. "I have been eating more lately."

Lori closed her eyes and shook her head. Of course, Lola had been eating more. The evidence was on video. Then, just as distractedly, Lori approached the door and knocked. "Mom!" she called. "It's me, Lori. I need to speak with you."

The door opened as Lola rose and headed upstairs, and Rita peered out. "Hi, honey!" she cooed enthusiastically. "I wasn't expecting you for another couple of weeks. What brings you home on a Sunday?"

"This!" barked Lori, holding her phone so her mother could see the invite.

"Come in..." whispered her startled and confused mother. "But be quiet."

Lori entered the room as her mother nervously backed away and locked it behind her. Then, turning on her mother, her face grew stern. "Well?"

"Baby, this isn't what it..." she began to say from her perch on her bed before being cut off.

"Shove it, Mother," ordered Lori, her face growing red. "I literally don't want to hear excuses right now. "You're running a child sex site! How could you do this to me?" she inquired, spittle shooting from her mouth.

"What?" gasped Rita, entirely surprised the subject wasn't about Lori's siblings but herself. "I don't..."

"Mom!" exclaimed Lori emphatically. "I remember everything! You gave me the most beautiful gift a mother could provide. You taught me the joy and ecstasy of sex, then took it away. For two years, I experienced nothing but happiness. Then, for the next seventeen, nothing! How do you think it makes me feel to see you still have sex with the others?"

"No, honey!" pleaded the distraught mother. "I never meant to abandon you! I swear! I only feared what might happen if you remembered. I did the same thing with everyone else," she explained. "It only started back up recently and quite by accident."

"Explain..." demanded Lori, pocketing her phone and folding her arms while glowering at her mother.

"Well..." began Rita timidly but honestly. "Since Lily was born, your father hasn't performed well. Later, I caught Lincoln watching child porn and took his laptop. After learning your father might be having an affair, I started masturbating to Lincoln's porn collection. Then..." she said, taking a long breath. "He caught me. One thing led to another, and Lola walked in on us. The only way to keep her silent was to promise to make her a star," she sighed. "Anyway, do what you want. I understand."

"Mom..." breathed Lori as she began to calm down. Letting her arms fall, she began pacing the floor. "Do you know why Leni and I are so close?"

"Not really," admitted her mother, shifting her weight. "But I always wondered. Usually, if siblings are too close in age, they fight and argue."

Lori paced in silence momentarily as she digested everything her mother told her. She couldn't believe her father was having an affair, but not performing at his age wasn't unheard of. Regardless, Lori couldn't blame her mother for seeking attention elsewhere. Finally, she stopped pacing and took a seat beside her mother.

"When you moved from me to Leni," Lori began recounting, "you weren't very careful. I'd watch from the door or closet, sometimes standing in the hall. At first, I was jealous, wishing it were me. But after a while," she continued. "I grew concerned that you'd have another baby and leave Leni feeling as abandoned as I did. So, when that came to pass, I took over."

"What do you mean?" Rita asked, shaking her head in confusion.

"We had sex, Mom," Lori clarified. "All this time, sharing a room, and nobody ever suspected," she mused, idly staring at the ceiling. "I remember the day you placed me on the table, shoving a zucchini up my ass and a carrot up my cunt before fingering my pisser. I recall sitting in the high chair, watching you shit and piss in a large bowl, stir it into a smooth cream, and spoon-feed it to me," she dreamily recalled. "I never wanted it to end, and I knew Leni wouldn't either."

"I see..." muttered Rita, not realizing how much impact she'd had on her children. "I'm truly sorry. But that was so long ago. What do you want from me?"

"What I want..." Lori demanded, still not looking her mother in the eye, "is for you to let me in on things. Otherwise, I'll inform the authorities."

"Hah!" chuckled Rita at the thought. "You're blackmailing me? That's funny. I had to do that to get Luan involved. My, how the tables have turned," she thought out loud. "But..." she sighed. "We'd love to have you."

"Not just me, Mom," responded Lori insistently. "Leni too."

"All the better," chirped Rita, delighted to have another two of her children on board. Despite one being a legal adult, she couldn't wait to have sex with and feed her baby again.

Lisa, the twins, Luna, Luan, and Lily, had all assembled by the entrance to the silo when Lincoln walked up with Lynn, hand in hand. Eying their brother suspiciously, they were about to question him when their mother exited the house with Lori and Leni in tow. Sighing, Lisa prepared her keypad for the additional participants and opened the hatch.

"I get Lynn and Leni finding out," the horny little scientist said. "But Lori?"

"Yeah. Hehe..." the older girl chuckled, rubbing her arm. "I got an invite."

"The only you could've gotten an invite is..." Lisa began replying before understanding took over. "Oh. You watch child porn."

"Mmhm," hummed Lori, nodding her head. "It was a way to relive my youth if you know what I mean."

"Alright..." barked Lisa, ushering everyone in. "Everyone inside before somebody notices the mass gathering."

Those who'd visited Heaven, as they'd taken to calling it, knowingly remained silent on the ride down the elevator. Now having to descend in two groups, Rita brought the newest additions to their sex cult down after Lisa and the other. And as the latter group entered the circular room, their faces lit up as the sights and scents hit their senses.

A far cry from the initial sterility of the basement, there were signs of filthy casual sex everywhere. From the heavily matted and damp mattress to puddles of urine, piss, and shit on the floor and walls, the room called to them in more ways than they could have ever imagined. It was more than they could've hoped for in their wildest fantasies.

The first group down had already disrobed, gathered additional chairs, and were busy fondling or using various sex toys on themselves or each other. Beaming proudly, Rita began stripping, and soon, Lynn, Leni, and Lori followed suit, eager to fuck or do something nasty with their family. Of course, Rita already had a plan based on what Lincoln told her.

"Alright, babies!" coughed Rita, getting everyone's attention as she straddled one of the metal chairs, grabbed a hair brush, and started masturbating her pisser while looking at her phone. "First things first," she announced. "Let's go through last night's comments. This first one is from Slaneshy Guy-22, and they say..."

Hey so I am finaly up to date with the videos. So great to see all the participants and we even got a new one great to see you FilthyBitch.

HornyMother this was great and an excelent way to initiate Filthybitch on the Family more dirty activities. Seeing that shit fly over everyone was just so hot. Hope to see more shit eating.

Also I wanted to say this specifically about BubbleBut, that part you said about wanting both Pain and Pleasure makes me so happy and from such a young girl, you trully are a pervert I bet you and all your siblings make your mother proud. So by Slanesh please make some pain play, that would be so exiting and Bubblebut Here obviouly want it, pleasse HornyMother give us and your little girl what she wants.

"Well," sighed Rita happily. "If you don't mind, I'll go first," she announced before entering her reply as HornyMother. "Thank you so much, Guy! My babies are all perverted, filthy little nymphs. The best part about our last video was the orgy afterward, where we licked each other clean!"

"My turn!" exclaimed Lana as her eager fingers flew over her phone. "Hi, Guy! FilthyBitch here. Knowing my fans are jerking it to my naked body and seeing my waste decorate the room is always a pleasure. It makes me so fucking horny. And hungry!"

Then, nodding at Lisa, the scandalous scientist entered her response. "Greetings, Guy. I'm BubbleButt, and you're right. I do love pain as much as I love pleasure. I have two wooden clothespins on my nipples right now and one on my clit. Having my family members pull on or twist them feels so good it makes me cum on the spot! But, in our next video, I'll be doling out some well-deserved pain."

"Okay," chirped Rita, reading the following message. "This next one is from The Wish Master, who says..."

When I saw the first video, I was caught by glitterbitch and goldenrod, I thought they were adults looking like children.

In the second video when I saw the cutie baby I understood it, you are real children.

And now, you are a real family. I love It.

Poor filthybitch, she was surprised, I imagined myself as Rod, and that kid was every girl that rejected me in high school.

Hornymother, girls, your are beutiful, and the shit makes them look exotic.

After hearing his name mentioned, he took the first response. "Hey there, Wish. Yes, we're all kids. Well, most of us. Mom isn't, and we'll introduce three new sisters tonight, one of whom is now an adult. But don't worry. They're all still filthy sex-craven kids at heart, completely shaven, to whet your appetite even more."

"Hiya, Wish!" replied Lana. "When they grabbed me and chained me to the bed, I was surprised. But from their previous videos, I was also so fucking turned on I couldn't say no. Feeling that spinning dildo probe my guts was so fucking satisfying I can't even describe the feeling. Just going in and out was amazing, but turning too? It was like a dream come true!"

"Alright, kids," sighed Rita. "That's it for the comments. Are we ready to get down to business?"

Rita glanced around as everyone eagerly nodded as they diddled themselves and each other into oblivion. Once all had indicated their readiness, the sinful mom began instructing them.

"Lola... Lynn..." she purred deviously. "I need you to roll around on the mattress. Get yourselves absolutely filthy. Grab handfuls of it and lather it into your hair. Whatever it takes to look like filthy whores. I want every bit of you covered in something. I'll explain the rest while you do that."

Somewhere in the suburbs on the opposite side of town, a crust old curmudgeon settled in the chair before his desk. With his aging yet massive erection in one hand, he brought up the website he'd been invited to with the other, eagerly awaiting tonight's video. They had yet to let him down, but he didn't see how they could top the one from last night. He was pleasantly wrong.

As always, the screen was initially black. Soon, the words "Sister Play" faded in briefly before the screen blended into the scene. Two girls lay sleeping on the soiled bed. One was GlitterBitch, and the other was new. The newest girl was a young teen with a toned body and a brown ponytail. She was as fit as they come, unlike her siblings.

The previous night's waste and cum covered both girls. Their skin glistened with days-old piss, and shit smears adorned their best assets. With their arms and legs intertwined, they snored soundly. At least until BubbleBut walked onto the set pushing a modest cart, not dissimilar to that which a hospital attended might use.

Among the assorted towels and linens, the cart also bore a wide selection of sex toys and implements. Smiling deviously, the girl, only known as BubbleButt, picked up two large syringes, about two inches in diameter and ten inches long. Though neither had needles attached to them, they contained a clear liquid. Her smile growing more devious, BubbleButt spoke.

"Hey! GlitterBitch! ThirdBase!" she called, kicking the mattress while brandishing the rods like magic wands. "Get up. It's time to play, and I want to have some fun."

"Huh?" groaned the brunette, rolling over and rubbing her nasty face. "What?"

"Ugh..." moaned the blonde, picking her head up and looking over ThirdBase's boobs at BubbleButt. "You could have let us sleep and still do whatever you wanted to us. We wouldn't have complained."

"I know," sighed BubbleButt. "However, it'll turn out much better for all with your cooperation," she informed her sisters, waving the syringes in their faces.

"Fine," conceded the girls as they sat up and adjusted to the light.

From their new positions, it was clear that both girls had distended abdomens, especially GlitterBitch, whose belly was twice that of ThirdBase's. BubbleButt surveyed their stomachs and smiled warmly.

"I want to try a new treatment for constipation, and you're going to help me," she announced. "I need you to get on your knees, fold your arms under you, and press your chests and stomachs to the bed, keeping your asses upright," BubbleButt instructed. "Then, spread your legs enough to force your cracks open."

Giving each other odd, curious glances, GlitterBitch and ThirdBase did as asked, facing each other as they lay in position, their feet hanging off the bed. Then, the shot changed to a close-up of the girls facing each other.

"I never pictured you a retainer," ThirdBase told her sister with one brow cocked.

"Um..." hummed GlitterBitch with both lips tucked inside her mouth. "I'm not retaining," she said. "It's everything I've eaten and drank over the past few days."

"Like what?" asked the trim girl, staring into her trashy little sister's eyes.

GlitterBitch cut her eyes toward the bed as she lay in the filth. "See that?" she asked. "That's my leftovers."

As a look of realization hit ThirdBase, her mouth hung open. "Oh, my, God..." she winced. "You..."

"Yup!" chirped the little blonde. "And you will too before it's over. Trust me. The smell doesn't do the taste any credit, and once you've tasted it, you'll like the smell too."

Suddenly, the scene shifted again as BubbleButt began addressing them.

"Alright, ladies," she chirped with authority as she set one of the syringes down. "Since ThirdBase is new, we'll start with her."

The scene changed again to a close-up of the sporty girl's crotch. The resolution was incredible, and the viewers would see her every detail, from the folds in her anus to the glistening of the dew on her inner folds. Using two fingers on her free hand, BubbleButt spread ThirdBase's cheeks even more, stretching her rear entrance tight enough to open slightly.

Then, before anything came out, she roughly shoved the syringe into her. Once inside, she pressed the plunger fully, depositing the clear fluid. As the older girl moaned loudly, BubbleButt removed the empty implement, grabbed the other, and repeated the process on GlitterBitch, who asked her little sister to push the syringe further in.

"Great job, ladies!" exclaimed BubbleButt as she set the empty vessels aside before flipping the switch on the little box. After a sharp click, a low hum began emitting from the device. Then, grabbing one of two metal rods several inches long and a few millimeters in diameter, she again used two fingers to part ThirdBase's labia.

"If you've never done this before, it's going to sting a little," she informed her sister as she located ThirdBase's urethral opening and slid the probe fully into it with one quick push.

"Oh, FUCK!" cried the girl, clawing at the bed as she screamed in pain

"Don't worry," the more petite girl cackled. "It only gets better from here."

Repeating the action on GlitterBitch, who seemed to enjoy the probe's insertion more than she should have, everything was ready. Almost.

"Mom!" called BubbleButt as she waved before walking off-screen. "They're ready for you."

Without the hairbrush lodged in her pisser, HornyMother entered the shot and sat between her daughters on the edge of the bed, licking her lips over their asses. Then, resting one hand near the bases of their backs, she began rubbing the two middle fingers of each hand up and down their cracks, smearing the already present filth into a fine brown coating.

Then, on the downstroke, she plunged her fingers deep into their anal openings, wiggling them around inside them, stirring their waste, and ensuring it was softening correctly. Occasionally, she'd pull them out, adding more mess to their tacky rears, only to insert them again. After about twenty minutes, she stood and smacked their cheeks.

As she walked off, licking her fingers, BubbleButt returned to the scene with two new girls. Both were older blondes, though different shades and styles. Like their sisters and mother, neither had much in the way of breasts, a solid B-cup if anything, and both were clean-shaven. Once both paraded for the camera for a moment, BubbleButt instructed them.

"GrandCanyon?" she said, addressing the slightly taller blonde. "Stand in front of GlitterBitch, please. TaskMaster?" she chirped, looking at the more aloof looking one. "Take a position in front of ThirdBase."

Grinning and giggling with each other in anticipation, the older girls did as told, holding hands as they waited for the experiment to proceed. Picking up a small control unit with two wires attached from the cart, BubbleButt walked up to the two girls on the bed, secured one wire to each probe, and stood back.

"Ready?" the more petite girl checked.

"Yeah!" cheered ThirdBase.

"Let 'er rip!" pleaded GlitterBitch.

The filthy-minded scientist turned the knob to one, sending a mild electric signal through her subjects' bodies, inciting low moans and groans from the girls. Then, amping things up to two and three, the girls rolled their eyes back in their heads and started drooling as they felt their insides tremor. Finally, BubbleButt slammed the knob to ten.

Instantly, the two girls on the bed cried out in intense pleasure and pain as their lower bodies seized, squeezing everything in their colons out like high-pressure water hoses. Squealing with delight, TaskMaster and GrandCanyon knelt, dousing their faces in the thick stream of liquid waste, running their fingers through their hair as if showering.

Then, standing up, they offered their chests and stomachs up to the constant stream as they lathered in it before turning and ensuring each other's backs were just as coated. Moving to their arms and legs, they had just reached their feet when the pressure began to wane, and their sister turned off the device, slipping the probes from her sisters.

Collapsing onto the bed, GlitterBitch and ThirdBase, finally opened their eyes, staring at each other in disbelief.

"That was the most incredible thing I've ever experienced..." murmured ThirdBase, still heavily drooling.

"The only thing that could've made it better," GlitterBitch said weakly, "would be doing it again with my mouth attached to your ass."

As the two older girls embraced each other's filth-ridden bodies, they passionately kissed and caressed before falling onto the bed between their sisters, laughing and giggling as they frolicked in the mess they'd made. Finally, HornyMother returned to the shot and waved everyone goodnight before the screen went black.

"That's all for tonight!" she declared. "Thanks for watching!"

"Goddamn," sighed the crotchety older man, his hands, thighs, and cock covered in cum. Standing up, he turned his computer off and started getting ready for bed. After all, he had a long day at his convenience store tomorrow. "That little Lola is something else. I tell you what," he said, calling the girl by her real name.