barucai

[Story] Abby's Algorithm

Published: February 24th 2025, 9:00:11 am

Hi Hi ✨

Sorry for the late upload, personal issues...again. I been working a lot and barely have time to write, for this reason I had to move the Muscles and modesty release for next week. But for now, I have this fun story inspired by BreakerGTS's Massive Miscalculation story. T3 & T4, your extra images are waiting for you in your folders, and T4 members, you can access a continuation with some more mom growth for this week's T4 story exclusive!

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Abby's Algorithm

"For the last time, I don't need your help!" Abby's voice echoed through the basement lab, frustration evident in every syllable. She stood with her arms crossed, barely reaching her younger brother's shoulder despite being two years his senior. At twenty, she was tired of being mistaken for a middle schooler.

Dan didn't look up from his workbench, where various mechanical components and a tablet displaying complex equations fought for space. "You've been complaining about this your whole life, Abs. I'm just trying to help."

"By turning me into your science experiment?" She kicked at a loose wire on the floor, watching it snake across the concrete. "I'm 4'11", not dying of some horrible disease. I've made peace with it."

"Have you though?" Dan finally looked up, pushing his glasses back up his nose. At 6'1", he towered over his sister, something that had always felt wrong to him. "Because last week when that guy at the grocery store asked if you were looking for your mom-"

"That was different!" Abby's face flushed at the memory. "He was being a jerk."

"And the time security wouldn't let you into that R-rated movie without ID?"

"Dan..."

"Or when your students' parents at the dance studio kept asking to speak to the 'actual instructor'?"

Abby slumped onto a worn leather sofa that had seen better days, their dad's contribution to Dan's "lab" when he converted the basement two years ago. "Fine. It sucks sometimes. But that doesn't mean I want to be your guinea pig."

Dan rolled his chair over to her, tablet in hand. "Look, I've been working on this for months. The theory is solid. The simulations all check out." He held up the tablet, showing a complex 3D model of what looked like a modified tanning bed. "It's completely safe."

"That's what Victor Frankenstein probably said too," Abby muttered, but she leaned forward to look at the screen. "How would it even work?"

Dan's eyes lit up, the way they always did when he got to explain his latest project. Despite being only eighteen, he was already in his second year of university, having skipped grades thanks to what their mom called his "beautiful but sometimes scary brain."

"It's actually pretty simple," he began, then caught Abby's skeptical look. "Okay, not simple-simple, but the basic concept is straightforward. You know how growth hormone works, right?"

"Vaguely. Something about telling cells to multiply?"

"Close enough. Well, I found a way to enhance that process using targeted electromagnetic fields. The device creates a carefully controlled energy matrix that stimulates your body's natural growth mechanisms. But instead of random growth, it's precisely directed." He swiped through several diagrams on the tablet. "I can literally program exactly how much height you gain."

Abby picked at a loose thread on her sleeve. "And you're sure it won't, I don't know, make my head explode or something?"

"Positive. I've tested it extensively on tissue samples. Plus," he hesitated, then continued, "I might have already tried a small-scale version on myself."

"What?" Abby sat up straight. "When?"

"Last month. Remember when I grew half an inch overnight?"

"I thought you were just having a late growth spurt!"

"Nope. That was a test run." He grinned. "Worked perfectly, and as you can see, my head remained unexploded."

From upstairs, their mom's voice carried down. "Dan! Abby! Dinner in ten!"

"Coming, Mom!" they called back in unison, a habit from childhood they'd never quite broken.

Abby stood up, brushing off her jeans. "I'll think about it, okay? But no promises."

"That's all I'm asking." Dan started gathering his papers. "Besides, what's the worst that could happen?"

"Famous last words, little brother." Abby headed for the stairs, then paused. "Hey, Dan? Thanks. For trying to help, I mean. Even if your methods are a bit mad scientist-y."

Dan smiled, but waited until she was upstairs before pulling up another set of calculations on his tablet. The ones he hadn't shown her, detailing the potential resonance effects of his device. He'd triple-checked everything, but there was still that nagging feeling he was missing something...

"Dan! Your food's getting cold!"

"Coming!" He closed the files and headed upstairs, the basement lights flickering slightly as he hit the switch. Probably just old wiring, he thought. Nothing to worry about.

Upstairs, their mom was placing a steaming lasagna on the dining table. Paula, or Mom as she insisted on being called even by their friends, had mastered the art of cooking while distracted – a necessary skill given her job as a remote IT consultant often had her solving coding problems while preparing meals.

"There's my scientists," she said warmly, her 5'4" frame moving efficiently around the kitchen. "Abby, honey, you've got chalk on your shirt again."

Abby looked down at her dance instructor's uniform, spotting the telltale white marks. "Occupational hazard. You should see what the kids can do with glitter."

"Speaking of which," Mom set down a basket of garlic bread, "how's the new junior class going?"

"Good! Well, mostly good. There's this one mom who keeps insisting I'm too young to be teaching. Apparently fifteen years of dance experience doesn't count if you look twelve." Abby slumped into her chair, her feet barely touching the ground.

Dan caught their mom's eye, and she gave him a subtle nod. They'd discussed his project before, and while she had her concerns, she understood his motivations. It was hard watching Abby struggle with something that affected her daily life so deeply.

"You know," Mom said carefully, serving the lasagna, "if Dan's really found a way to help..."

"Not you too!" Abby groaned. "Has he got everyone convinced?"

"I trust your brother's science," Mom replied. "And more importantly, I trust that he wouldn't do anything to hurt you."

"Like that time he convinced me to test his 'improved' skateboard and I ended up with a broken arm?"

"That was three years ago!" Dan protested. "And in my defense, the design was sound. You just didn't follow the weight distribution guidelines."

"I was following them! Your calculations were off!"

"Which is exactly why I triple-check everything now," Dan pointed out, reaching for the garlic bread. "Come on, Abs. Just let me show you the final setup. If you're not convinced, we drop it. Deal?"

Abby pushed her food around her plate, considering. Finally, she sighed. "Fine. After dinner. But I'm just looking, not agreeing to anything."

"That's my girl," Mom smiled. "Now, who wants to hear about the client who managed to delete their entire database while trying to change their desktop background?"

As their mom launched into her story, Dan caught Abby's eye across the table. She stuck her tongue out at him, a gesture that somehow managed to convey both annoyance and affection. He grinned back, already mentally reviewing his equipment setup.

This was going to work. It had to work. He'd accounted for every variable, every possibility.

Well, almost every possibility...

"It looks like a crossbreed between a tanning bed and a MRI machine," Abby observed, circling the device Dan had set up in the basement. The metallic surface gleamed under the fluorescent lights, covered in subtle patterns that seemed to shift when she wasn't looking directly at them.

"That's... actually not a bad description," Dan admitted, checking connections on a nearby laptop. "The field generation requires a similar containment system to an MRI. Just, you know, with more quantum mechanics involved."

"Right, because quantum mechanics makes everything better," Abby rolled her eyes. "So what do I do? Just lie down?"

"First, put these on." Dan handed her what looked like hospital scrubs. "Your clothes might get a bit tight otherwise."

Abby took the garments, raising an eyebrow. "You've really thought of everything, haven't you?"

"Changed in the bathroom upstairs. I'll finish the calibration while you're gone."

When Abby returned, the scrubs hanging loose on her small frame, Dan was muttering to himself and typing rapidly. The machine hummed softly, emitting a faint blue glow from its seams.

"Last chance to back out," Dan said, looking up from his screen.

Abby took a deep breath. "Just... promise me again this is safe?"

"Completely safe. Scout's honor." He held up his hand in what was definitely not the correct scout salute.

"You were never a scout, you dork." But Abby was smiling as she approached the machine. "How long will this take?"

"About five minutes. You might feel a bit tingly, but that's normal." Dan helped her lie down on the padded surface. "Ready?"

"As I'll ever be." Abby closed her eyes as the upper section lowered, encasing her in a cocoon of soft blue light. "This better not turn me into the Hulk."

"Nah, Bruce Banner had gamma rays. This is completely different." Dan's voice came through clearly despite the humming. "Starting now. Remember, just relax."

At first, Abby felt nothing but a slight warmth. Then the tingling started, just as Dan had predicted. It wasn't unpleasant - more like the sensation of a foot waking up, but spread throughout her entire body.

"How you doing in there?" Dan called out.

"Fine. It tickles a bit." Abby wiggled her toes. "How much longer?"

"Three minutes. Everything's looking perfect." The sound of typing continued. "Your vitals are stable, and the field matrix is- wait."

"Wait? What do you mean, wait?"

"Nothing! Just a small power fluctuation. Totally normal."

The lights in the basement flickered. The machine's hum deepened, becoming more intense.

"Dan?"

"It's fine! Just... hold on." More rapid typing. "Almost done!"

The tingling sensation increased, becoming almost electric. Abby felt a strange pressure throughout her body, as if she was being gently stretched in all directions. The machine's hum reached a crescendo, then suddenly stopped.

The upper section raised smoothly, and Abby blinked in the sudden brightness. Dan was already beside her, helping her sit up.

"How do you feel?" he asked, grabbing his measuring tape.

Abby took stock of her body. Everything felt... different. The scrubs didn't seem quite as loose anymore, and the edge of the machine, which had been at mid-thigh level when she lay down, now seemed lower.

"I feel... okay, actually. Pretty good." She swung her legs over the side and stood up. "Did it-"

She stopped, staring at Dan. Something was off. She was looking him directly in the... chin?

"Hold still," Dan instructed, extending the measuring tape. A moment later, he grinned. "Five foot five exactly. Perfect!"

"What?" Abby rushed to the full-length mirror Dan had set up nearby. Her reflection showed a young woman in slightly snug scrubs, with the same face she'd always known, but... taller. Much taller. Her usual eye level in the mirror was now at her collar bone.

"It worked!" Dan was practically bouncing. "The field containment was perfect, the growth distribution is exactly as calculated, and-"

"I'm tall," Abby interrupted, still staring at her reflection. "I'm actually tall." She turned sideways, noting how the scrubs now hugged curves that hadn't been there before. Her proportions had adjusted with her new height, giving her a figure that looked natural rather than stretched.

"Well, average height actually," Dan corrected. "But yeah, no more getting mistaken for a kid!"

Abby walked around the basement, marveling at how different everything looked from her new height. The shelves seemed lower, the ceiling closer. Even her steps felt different - longer, more confident.

"We should go show Mom!" she said excitedly, heading for the stairs.

"Wait!" Dan called after her. "Maybe we should-"

But Abby was already taking the stairs two at a time, a new experience that made her laugh out loud. She burst into the kitchen where their mom was loading the dishwasher.

"Mom! Look! It worked!"

Their mother straightened up, looking confused. "What worked, honey?"

"Dan's machine! Look how tall I am!"

Mom glanced between her children, frowning slightly. "Are you feeling alright? You've always been that height."

"What? No, I was 4'11" like an hour ago! Dan, tell her!"

But Dan, who had followed her upstairs, was staring at their mother with an odd expression. "Mom," he said carefully, "how tall would you say Abby is?"

"Five foot five, same as she's been since she finished growing. Why are you both acting so strange?"

Abby's excitement deflated like a punctured balloon. "But... but I just grew! Right now! In Dan's machine!"

"Honey, maybe you should lie down," Mom said, looking concerned. "You seem a bit confused."

"I'm not confused! Dan, what's going on?"

Dan grabbed her arm, pulling her toward the basement. "We should run some tests. Mom, we'll be right back!"

Back in the basement, Abby paced while Dan typed furiously on his laptop.

"Why doesn't she remember? It's like she thinks I've always been this height!"

"I'm checking the logs now," Dan muttered. "Everything looks normal, except... oh."

"Oh? I don't like 'oh'. What's oh?"

Dan pushed his glasses up, a habit he had when he was nervous. "There was a power surge right at the end of the sequence. It might have caused some kind of... reality alteration effect."

"Reality alteration? What does that even mean?"

"I think... I think the machine didn't just change your height. It changed everyone's memory of your height. Like it rewrote history to make your new height the way things have always been." He looked up at her. "Except for us. We remember because we were right next to the machine when it happened."

Abby sat down heavily on the sofa, which now seemed smaller than she remembered. "So what you're saying is, according to everyone else, I've always been this tall?"

"Apparently." Dan was already pulling up new calculations on his screen. "The question is, why did this happen? And more importantly... what else might the machine have changed?"

The basement lights flickered again, almost imperceptibly. Neither of them noticed.

Abby was too busy examining her new body, while Dan was absorbed in his calculations. Neither suspected that this was just the beginning of much bigger changes to come.

"You want me to do what?" Abby stood with her hands on her hips, still getting used to her new height of 5'5". The scrubs from earlier were now sitting comfortably on her frame, as if they'd been made for her new size.

Dan barely looked up from his laptop, fingers flying over the keyboard. "Just one more session. I think I found what caused the memory effect, and I can use it to fine-tune the results."

"Fine-tune? Dan, I'm still processing being this tall. And the fact that apparently I've 'always' been this height." She made air quotes with her fingers.

"That's exactly why we need to try again!" He spun his chair to face her. "If I'm right, I can control the field harmonics better this time. Maybe even reverse the memory effect."

Abby crossed her arms. "And if you're wrong?"

"Then..." He adjusted his glasses. "Well, you might get a bit taller. But that's not necessarily bad, right?"

"I don't know..." Abby glanced at the machine, which was humming softly. "What if something goes wrong?"

"Trust me?" Dan gave her his best puppy-dog eyes, the same look he'd used when they were kids and he wanted her to cover for his latest experiment.

"Ugh, fine." She couldn't help but smile. "But this is the last time, okay?"

"Promise!" Dan's face lit up as he started adjusting settings. "Same as before - scrubs on, lie down, try to relax."

Abby positioned herself in the machine, which somehow felt smaller than last time. "You know, most sisters just borrow their brother's sweaters. I get a quantum growth chamber."

"Hey, I'm just special that way." The upper section began to lower. "Ready?"

"Hit me with your science, little brother."

The familiar blue glow enveloped her, accompanied by the tingling sensation. This time, however, something felt different. The energy seemed more intense, more focused. The pressure wasn't just gentle stretching anymore - it felt like her whole body was expanding.

"Dan?" She called out, a hint of worry in her voice.

"It's okay! Just a slight power increase to stabilize the field." His voice sounded strained. "Almost done!"

The basement lights began to flicker rapidly. The machine's hum grew deeper, resonating through her bones. Abby felt a rush of warmth spread from her core to her extremities.

Suddenly, everything stopped. The upper section lifted, and Abby sat up slowly, feeling oddly light-headed.

"Well," Dan said, staring at his laptop screen. "That was... unexpected."

"What?" Abby swung her legs over the side and stood up. The floor seemed further away than before. A lot further. "Dan, what did you do?"

She looked at her brother, who now appeared to be significantly shorter than her. The scrubs were definitely tighter, particularly around her chest and hips.

"Minor calibration issue," Dan muttered, grabbing his measuring tape. "Just need to... oh."

"Oh? What's oh?" Abby's voice rose slightly. "How tall am I?"

Before Dan could answer, they heard their mom calling from upstairs. "Kids? Everything okay down there? The power's acting funny!"

"Fine, Mom!" they called back in unison.

"Come up for a snack! I made those chocolate chip cookies you like!"

Abby started toward the stairs, but Dan grabbed her arm. "Wait, maybe we should-"

Too late. Abby was already halfway up, though she had to duck slightly to avoid hitting her head on the stairwell ceiling. She emerged into the kitchen and froze.

Their mom was by the oven, pulling out a tray of cookies. But something was very, very different. Paula, who had always been a petite 5'4", now towered in the kitchen. Her head nearly brushed the ceiling, and her usual comfortable mom clothes strained to contain a dramatically more curvaceous figure.

"Mom?" Abby squeaked.

"Yes, honey?" Her mother turned, having to bend down slightly to place the cookie tray on the counter. "Oh good, you're just in time! They're still warm."

Dan appeared behind Abby, his eyes wide as he took in the scene. Their mother, seemingly oblivious to her enormous size, was humming as she transferred cookies to a cooling rack.

"Want to be my taste testers?" She smiled down at them - way down at Dan, and slightly down at Abby, who was now a solid six feet tall herself.

"Um, sure," Abby managed, accepting a cookie that looked tiny in her mother's large hand. "Mom, did you... do something different today?"

"Different?" Paula glanced down at herself. "Oh, you mean the new apron? Found it at that cute shop downtown."

Dan pulled out his phone and quickly typed something, showing it to Abby: "It's happening everywhere. Check the news."

Abby pulled out her own phone, nearly dropping it as her now-larger fingers fumbled with the screen. Social media was buzzing with activity, but not about what she expected. People were posting about normal things - work, relationships, funny cat videos. Not a single mention of women suddenly being much taller.

"These turned out pretty good," their mom was saying, sampling a cookie herself. "Though I might add more vanilla next time. What do you think?"

"They're great, Mom," Dan said automatically, still staring at his phone. "Hey, Abs, can you help me with something downstairs?"

"Sure..." Abby grabbed another cookie, noticing how small it looked in her palm. "Thanks, Mom."

Back in the basement, Dan immediately went to his computer. "This is fascinating! The effect isn't just local - it's worldwide! But just like before, nobody seems to notice except us!"

"Dan," Abby said slowly, "what exactly did your machine do?"

He looked up at her - way up - and swallowed hard. "I think... I think when I tried to stabilize the field, it created some kind of resonance effect. Instead of just affecting you, it affected every woman on Earth. And just like before, it rewrote everyone's memories to make it seem normal."

"Every woman? You mean..."

"Yep. Right now, every woman in the world is experiencing proportional growth. But they all think they've always been that size." He pushed his glasses up nervously. "The good news is, the growth seems to have stabilized. The bad news is..."

The lights flickered again.

"Oh no," they said in unison.

"One more try," Dan pleaded, gesturing at his laptop screen. "Look, I've isolated the resonance factor. This time it'll only affect you, I promise."

Abby leaned against the wall, having to bend her neck to avoid the ceiling. At 6'0", she was still notably shorter than their mom upstairs. "That's what you said last time. And the time before that."

"But this time I mean it! The calculations are perfect." He spun the laptop to show her. "See? I've contained the field effect to just the immediate area."

"Dan..." Abby sighed, watching her brother's enthusiastic expression. "Maybe we should just leave things as they are. I mean, I'm still the shortest woman I know."

"Exactly! This isn't fair - you were supposed to be taller, but instead everyone else grew too. Just one more adjustment and-"

The house lights flickered again, and they heard their mother call down: "Kids? Power's acting up again!"

"It's fine, Mom!" they shouted back, then Abby lowered her voice. "No, Dan. We need to fix this."

"But-"

"Not make me taller. Fix it. All of it. Put everyone back to normal."

Dan's face fell. "But... but you wanted to be taller!"

"I wanted to be normal height, not live in a world where every woman is suddenly gigantic! Do you have any idea how weird this is?" She gestured upstairs. "Mom barely fits in the kitchen anymore. My dance students' mothers are all like eight feet tall. Nothing makes sense!"

"We could get used to it," Dan suggested weakly.

"Dan." Abby fixed him with her best big-sister stare. "Can you reverse it or not?"

He slumped in his chair. "Yeah. I think so. I'd need to recalibrate the field to inverse the growth pattern, but..." He typed rapidly for a few moments. "Theoretically, I can return everyone to their original height."

"Then do it."

"But-"

"Dan."

"Fine." He started adjusting settings, muttering under his breath. "Stupid physics... stupid conservation of mass... stupid-" He stopped suddenly, looking up. "Wait, did you say something about conservation of mass?"

"No?"

"Oh. Right. Of course not." He returned to his work, typing even faster now. "Okay, ready when you are."

Abby eyed the machine suspiciously. "You're sure about this?"

"Mostly?" He gave her a weak smile. "Look, worst case scenario, nothing happens. Best case, everything goes back to normal."

"Those don't sound like the only two options," Abby muttered, but she was already moving toward the machine. "Let's just get this over with."

She lay down, noting how the pad seemed to creak under her weight more than before. The upper section lowered, and the familiar blue glow returned.

"Starting reversal process now," Dan's voice came through. "You might feel a bit... different this time."

"Different how- oh!" Abby gasped as an intense sensation swept through her body. It wasn't like the stretching feeling from before. This was more like being compressed, but not painfully. She felt dense, like her body was being packed into a smaller space.

The machine's hum took on a new tone, higher pitched than before. The basement lights didn't just flicker - they pulsed in rhythm with the humming.

"Dan?" Abby called out, feeling increasingly strange. "Is it supposed to feel like this?"

"Um, probably? The readings are a bit... interesting."

"Interesting? What's interesting?"

"Nothing! Just... hold on. Almost done!"

The sensation intensified. Abby felt like her entire body was being squeezed, but instead of being uncomfortable, it felt like her muscles were coiling, becoming more compact but somehow stronger.

With a final pulse of light, everything stopped. The upper section lifted, and Abby sat up slowly.

"Did it work?" She looked down at her hands. They seemed smaller, but... different. More defined. She could see the muscles in her forearms shifting as she moved her fingers.

Dan was staring at his screen, mouth slightly open. "Oh. Oh no."

"What?" Abby stood up - and nearly hit the ceiling as she jumped, her legs feeling like coiled springs. "Whoa!"

"So, um, funny story," Dan began, nervously adjusting his glasses. "Remember how I was muttering about conservation of mass?"

"Dan..."

"Well, I might have forgotten to account for that in the reversal process. You're back to your original height, but..." He gestured at her body.

Abby rushed to the mirror and froze. She was indeed back to 4'11", but her body had... changed. The scrubs, which had been loose at the start, now strained against clearly defined muscles. Her arms, legs, shoulders - everything was sculpted like she'd been training for years.

"What did you do?" She flexed experimentally, watching muscles ripple under her skin.

"The mass had to go somewhere!" Dan explained hurriedly. "When you shrink something, you can't just make matter disappear. So instead of dispersing it, it..." He waved vaguely at her new physique.

"Dan." Abby's voice was dangerously calm. "Please tell me this only affected me."

Before he could answer, they heard a crash from upstairs, followed by their mother's voice: "Oh! These jars are lighter than I remember!"

They looked at each other in panic and raced upstairs. In the kitchen, they found their mom standing amid some scattered groceries, looking confused. She was back to her normal 5'4", but her usual comfortable mom clothes were straining against a significantly more muscular frame.

"Honey," she called out, not seeing them yet, "did you change something about these grocery bags? I nearly threw them through the ceiling!"

"Mom?" Abby ventured.

Paula turned, and both siblings tried not to gasp. Their mother's new physique made her look like she could bench press a car - which, given how she'd just described the groceries, she probably could.

"Oh, there you are! The strangest thing just happened. Everything feels so light all of a sudden!" She picked up a full bag of groceries with one finger to demonstrate. "See?"

"That's... that's great, Mom," Dan managed. "We'll just... we need to check something."

They retreated back to the basement, where Dan immediately pulled up news feeds on his laptop.

"Just as I thought," he groaned. "It's everywhere. Every woman who was affected by the height increase has now... well..."

He turned the screen to show Abby. Social media was filled with posts, but not about the changes - instead, women were casually mentioning things like "accidentally crushed another doorknob" or "had to be extra careful hugging the kids today!"

"So let me get this straight," Abby said, crossing her arms (and marveling at how that simple motion made her biceps bunch impressively). "You tried to make me taller. Instead, you made every woman on Earth taller. Then, when you tried to fix it, you turned every woman on Earth into super-strong bodybuilders?"

"But they think they've always been this way!" Dan offered weakly. "Just like before! See? No panic, no chaos..."

"Dan."

"Yes?"

"Fix this."

"I'm not sure I-"

"Fix. This."

The lights flickered again, more intensely this time. They both looked up at the ceiling, then at each other.

"Oh no," Dan whispered.

"What now?"

"Remember how I said the mass had to go somewhere?"

"Yes?"

"I think it's still going."

From upstairs, they heard their mother exclaim: "Oh my! These grocery bags just keep getting lighter!"