Sister is a stealer - muscles-stealing machine story

[BravoBoy]

First story here, be nice

# Chapter 1: The Unexplained Decline

Jake Thompson stared at his reflection in the gym's floor-to-ceiling mirror, a frown creasing his usually confident face. At 19, he had been the pride of his high school's wrestling team and had seamlessly transitioned into the world of bodybuilding. Standing at 6', he had worked tirelessly to build his impressive 265 lb (120 kg) frame, most of it solid muscle. But lately, something was off.

He grabbed a dumbbell, one he used to curl with ease just a few weeks ago. As he attempted to lift it, his bicep strained, and a bead of sweat formed on his brow. The weight felt impossibly heavy.

"What the hell?" Jake muttered, setting the dumbbell down with a soft thud.

He glanced around the gym, hoping none of the regulars had noticed his struggle. His gaze lingered on his favorite bench press, where he used to throw around plates like they were frisbees. Now, he couldn't shake the feeling that if he tried, he might get pinned under the bar.

Jake's t-shirt, once stretched tight across his chest and arms, now hung a bit loose. He pinched the fabric, pulling it away from his body. There was definitely more give than there used to be. He had noticed his weight dropping on the scale at home, but he'd brushed it off as water weight or a faulty scale. Now, he couldn't deny the evidence before his eyes.

As he packed up his gym bag, feeling deflated and confused, Jake's mind wandered to his family. He pictured them all gathered around the dinner table:

His father, Robert, a former college football star, still cut an impressive figure at 48. At 5'10" and 220 lbs (100 kg), he had retained much of his athletic build, though a small paunch had developed over the years. Robert's stories of his glory days on the field had inspired Jake's own fitness journey.

His mother, Sarah, stood at 5'3" and weighed about 154 lbs (70 kg). Though she had let her gym membership lapse years ago, she remained strong from years of keeping up with three active children. Her no-nonsense attitude and quick wit kept the family grounded.

Then there were his sisters. Megan, 16, had always been the artsy one. At 5'4"  and 123 lbs (56 kg), she was lean and graceful, more likely to be found in a dance studio than a gym. Lately, though, Jake had noticed her taking a sudden interest in fitness, often asking to tag along to the gym.

Finally, there was little Emma, the baby of the family at 13. Standing at 5'1" and weighing just 99 lbs (45 kg), she was going through that awkward early teen phase, all elbows and knees.

As Jake drove home, his mind raced. How could he be losing strength and muscle so rapidly? He had maintained his diet, his sleep schedule, his training regimen. Nothing made sense.

Pulling into the driveway, he caught sight of Megan through the living room window. She was doing push-ups, an activity he had never seen her engage in before. For a moment, he thought he saw a glint of metal on her finger, but he blinked, and it was gone.

Jake shook his head, trying to clear the fog of confusion and frustration. Whatever was happening to his body, he was determined to get to the bottom of it. Little did he know, the answer was closer – and stranger – than he could possibly imagine.

[BravoBoy]

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# Chapter 2: Megan's Metamorphosis  Megan Thompson finished her final set of push-ups, her arms trembling slightly from exertion. She rose to her feet, wiping a bead of sweat from her brow as she approached the full-length mirror in her bedroom. The girl who stared back at her was barely recognizable from just a few weeks ago.  At 5'4" (163 cm), Megan now weighed a solid 137 lbs (62 kg), all her newly gained weight pure, lean muscle. Her once-slender frame had transformed into a sculpted physique that would make fitness models envious. She flexed her bicep, watching the muscle bulge impressively.  "Not bad," she murmured, a smirk playing on her lips.  Her hands traced the defined ridges of her abdominals, marveling at the six-pack that had seemed impossible just a month ago. Her legs, once slim and unremarkable, now rippled with muscle. She turned, admiring her newly rounded and firm glutes.  As she posed, the light caught the metallic glint of the ring on her finger. It looked innocuous enough – a simple band with intricate engravings that seemed to shift and change when you weren't looking directly at them. Megan remembered the night she had stumbled upon it on an obscure online marketplace.  *"Muscle Absorption Ring – Transfer strength from others to yourself!"* the listing had claimed. She had laughed, thinking it was just another scam product. On a whim, she'd used her allowance to buy it, expecting nothing more than a cheap piece of costume jewelry.  When it arrived, she'd slipped it on as a joke, fully prepared to leave a scathing review. Then, during a typical sibling scuffle with Jake, something extraordinary happened. As her ringed hand made contact with his arm, she felt a surge of energy course through her body. Jake had stumbled back, suddenly looking winded.  From that moment on, Megan had been obsessed with her new "power." Every casual touch, every seemingly innocent bump in the hallway became an opportunity. Jake, always the athletic golden boy, was her primary target. But he wasn't the only one.  Her thoughts drifted to Brad, her ex-boyfriend. The memory of him dumping her for Brittany, the busty cheerleader, still stung. "She might have bigger boobs," Megan muttered to her reflection, flexing her arms, "but let's see how Brad likes *these* guns."  A plan began to form in her mind. The upcoming pool party at Brad's house would be the perfect opportunity. She'd show up looking like this, and maybe accidentally bump into both Brad and Brittany. She grinned at the thought of Brad's shock and Brittany's dismay.  But a small voice in the back of her mind whispered doubts. Was this right? Taking something so fundamental from others without their knowledge or consent? She pushed the thought away. After years of feeling weak, of being the target of Jake's teasing, of being overlooked by guys like Brad, she finally had power.  Megan clenched her fist, feeling the ring press against her skin. No, she decided. She wouldn't stop. Not when she was just beginning to feel strong, to feel in control. The world had better watch out – Megan Thompson was done being underestimated.  With one last admiring glance at her reflection, she headed for the shower. Tomorrow was another day, another opportunity to grow stronger. And she had no intention of wasting it.

[BravoBoy]

# Chapter 3: Family Dinner Tensions

The Thompson family gathered around the dinner table, the air thick with unspoken tension. Sarah, ever the peacekeeper, had prepared a hearty lasagna, hoping that comfort food might ease whatever was troubling her children.

"So, how was everyone's day?" Robert asked, his deep voice breaking the awkward silence as he served himself a generous portion.

Jake pushed his food around his plate, his usual voracious appetite noticeably absent. "Fine," he mumbled, not meeting anyone's eyes. His t-shirt, once snug, now hung loosely on his frame. The change wasn't dramatic enough to raise immediate alarm, but it was clear to anyone who knew him well that something was off.

"Just fine?" Sarah pressed, her brow furrowed with concern. "Honey, you've barely touched your food. Are you feeling alright?"

Before Jake could respond, Megan chimed in, "Oh, he's probably just on some new diet, right, Jake?" There was an edge to her voice, a barely concealed smugness that made Jake's jaw clench.

"I'm not on a diet," Jake snapped. "I've just... I don't know. Maybe I'm coming down with something."

Emma, the youngest, looked between her siblings with wide eyes. At 13, she was perceptive enough to sense the undercurrents of tension but not quite old enough to fully understand them. "But you never get sick, Jake," she said, her voice small and confused.

Megan snorted, earning a sharp look from her mother. Sarah couldn't help but notice how Megan's posture had changed recently. She sat straighter, exuding a new confidence that bordered on arrogance. And was it her imagination, or did Megan's arms look more defined?

"Well, there's a first time for everything," Megan said, flexing her arm as she reached for the salad bowl. The movement caused her bicep to bulge noticeably, drawing surprised looks from both her parents.

Robert cleared his throat. "Megan, have you been working out? You're looking... fit."

A slow smile spread across Megan's face. "Thanks, Dad. I've been trying some new exercises. It feels good to be strong, you know?"

Jake's fork clattered loudly against his plate. "I'm not feeling well," he announced abruptly, standing up. "May I be excused?"

Without waiting for an answer, he strode out of the dining room. A moment later, they heard his bedroom door slam shut.

Sarah half-rose from her chair, concern etched on her face, but Robert gently touched her arm. "Let him be, honey. He's probably just going through a phase."

Emma pushed her chair back. "I'm going to check on him," she declared, hurrying after her brother.

As Emma left, Megan helped herself to a second serving of lasagna, her appetite seemingly increased along with her muscle mass. Sarah couldn't shake the feeling that something was seriously wrong with her family dynamic.

"Megan," she began cautiously, "is everything okay between you and Jake? You two seem... different lately."

Megan shrugged, her new muscles rippling with the movement. "Everything's fine, Mom. Jake's just being dramatic, as usual. Maybe he's finally realizing he's not the only strong one in the family anymore."

Robert and Sarah exchanged worried glances. This wasn't like their children at all. Jake had always been confident but never cruel, and Megan, while artistic and independent, had never shown this level of... was it aggression?

As the dinner continued in uncomfortable silence, broken only by the scrape of cutlery on plates, Sarah resolved to get to the bottom of whatever was going on with her children. Something had upset the balance in their home, and she was determined to find out what it was.

Little did she know, the truth was far stranger and more dangerous than she could ever imagine, and it all centered around the innocuous-looking ring glinting on Megan's finger as she reached for yet another helping of food to fuel her growing body.

[Sicod]

Great slow start.

[BravoBoy]

# Chapter 4: Emma's Discovery

Emma stood outside Jake's closed door, her small fist raised to knock but hesitating. The muffled sounds of frustration from within made her heart ache. This wasn't like her big brother at all.

"Jake?" she called softly, finally tapping on the door. "Can I come in?"

A moment of silence followed, then a resigned sigh. "Yeah, Em. Come on in."

Emma pushed the door open, her eyes widening as she took in the sight before her. Jake sat on the edge of his bed, head in his hands. Clothes that once fit him perfectly now lay scattered around the room, discarded for being too loose. His usually neat workout area was in disarray, as if he'd tried to exercise in a frenzy.

"Are you okay?" Emma asked, perching beside him on the bed.

Jake lifted his head, offering a weak smile that didn't reach his eyes. "I'm fine, squirt. Just... going through some changes, I guess."

Emma's brow furrowed. At 13, she was familiar with the concept of 'changes', but this seemed different. "But you're getting smaller," she observed bluntly. "That's not how it usually works, right?"

A harsh laugh escaped Jake's lips. "No, it's not," he agreed. His eyes drifted to a framed photo on his nightstand – a picture of him at his last bodybuilding competition, muscles gleaming under the stage lights. The contrast between that image and his current state was stark.

"And Megan's getting bigger," Emma continued, her young mind trying to piece together the puzzle. "It's like... like you're switching places or something."

Jake's head snapped up, a spark of realization in his eyes. "Switching places," he repeated slowly. "Emma, you might be onto something."

Before Emma could ask what he meant, a knock at the open door interrupted them. Megan leaned against the doorframe, her newly muscular arms crossed over her chest. "Having a little pity party in here?" she asked, her tone mockingly sweet.

Emma felt Jake tense beside her. She looked between her older siblings, noticing for the first time how Megan seemed to fill the doorway in a way she never had before. There was something in Megan's stance, a predatory confidence that sent a shiver down Emma's spine.

"Get out, Megan," Jake growled, but the threat in his voice fell flat, undermined by his diminished physique.

Megan's laugh was cold. "Or what, big brother? You'll throw me out?" She flexed an arm, the muscle bulging impressively. "I'd like to see you try."

As the tension in the room reached a breaking point, Emma's eyes were drawn to a glint of metal on Megan's hand. The ring. She'd never paid much attention to it before, but now...

In a flash of insight that belied her years, Emma suddenly understood. Every time Megan had touched Jake recently – a punch on the arm, a shove in the hallway – Jake had seemed to weaken while Megan grew stronger.

"It's the ring," Emma whispered, her eyes wide.

Both Jake and Megan turned to look at her, confusion and alarm warring on their faces.

"What did you say?" Megan demanded, her voice sharp.

But Emma was already moving, slipping past Megan and racing down the hallway. She had to tell their parents. She had to do something before this strange power tore their family apart.

Behind her, she heard Megan curse and start to give chase. Emma's heart pounded as she ran, knowing that her next actions could change everything. The truth about the muscle-stealing ring was about to come to light, and Emma could only hope that exposing it would be enough to save her family from its insidious influence.

[Sicod]

Love the predatory nature of Megan. Would be interesting in seeing her pivot from just stalking her brother to going after creepy gym bros who deserve it for how they treat woman. Or not, your story!

[phil123]

What a great way of growing. Hope for more.

[BravoBoy]

# Chapter 5: Power Shift

Jake's patience had reached its breaking point. As Emma darted past Megan and disappeared down the hallway, he rose from his bed, a new determination setting his jaw. He'd had enough of feeling weak, enough of Megan's smug superiority. It was time to confront her directly.

"What the hell is going on, Megan?" he demanded, stepping towards her. Even in his diminished state, he still had a few inches on his sister. "What did Emma mean about the ring?"

Megan's eyes narrowed, a mix of anger and panic flashing across her face. She glanced down the hallway where Emma had fled, then back to Jake. In that moment, she made a decision.

"You want to know what's going on, big brother?" she sneered, emphasizing the 'big' with biting sarcasm. "Why don't you come and find out?"

Jake, driven by frustration and a desperate need to understand, lunged forward. His intention was to grab Megan's wrist, to force her to explain. But Megan was ready for him.

As Jake's hand closed around her arm, Megan twisted, bringing her ringed hand into contact with Jake's bare forearm. The effect was instantaneous and shocking.

A jolt of energy surged through Megan's body, starting from the point of contact. Jake's eyes widened in shock and pain. He tried to pull away, but Megan's grip was like iron.

"What... what are you doing?" Jake gasped, his voice weak and strained.

Megan didn't answer. Her eyes were closed in concentration, her body trembling as she absorbed more and more of Jake's strength. Muscles rippled and grew beneath her skin, her t-shirt stretching tight across her expanding frame.

Jake, meanwhile, felt himself growing weaker by the second. His already diminished muscles seemed to be melting away. His knees buckled, and he sank to the floor, Megan following him down, never breaking contact.

"Megan, stop," Jake pleaded, his voice barely above a whisper. "Please."

Finally, Megan released him. Jake collapsed fully, panting and shaking. When he managed to lift his head, the sight before him was terrifying.

Megan stood over him, transformed. Her body, already athletic from previous thefts, had become a marvel of muscular development. Her arms bulged with power, her shoulders broad and imposing. The shirt she wore had ripped at the seams, unable to contain her new mass.

"Now do you understand, Jake?" Megan's voice was deeper, resonant with her new size. She flexed an arm, admiring the peak of her bicep. "This is power. Real power."

Jake tried to stand, but his body felt foreign, weak. He looked down at himself in horror. His once impressive physique had withered away, leaving him looking almost skeletal.

"Why?" he managed to croak out. "Why would you do this?"

Megan knelt beside him, her new bulk making the action look almost comical. "Because I was tired of being the weak one. Tired of you always being the star, the strong one, the one everyone admired." Her voice softened slightly. "Do you have any idea what it's like to live in your shadow?"

Before Jake could respond, they heard footsteps pounding up the stairs. Emma's voice rang out, "Mom! Dad! Come quick!"

Megan's head snapped up, her expression hardening. She looked back at Jake, conflict clear in her eyes. For a moment, it seemed like she might say something more, offer some explanation or even an apology.

Instead, she stood and turned away. "This isn't over," she said quietly, before striding out of the room to face whatever was coming.

Jake remained on the floor, his mind reeling. As the sound of shocked exclamations and confused questions filtered in from the hallway, he closed his eyes, wondering how they had arrived at this point and, more importantly, where they would go from here.

The power dynamic in the Thompson household had shifted dramatically, and nothing would ever be the same again.

[BravoBoy]

Anyone want me to continue?

[Balthour]

I want so much

[Sicod]

Yes please!

[newvintage]

Yes, I'd love to see where this goes.

[addie40ff]

Yes, most certainly.

[Ophaki]

Yes!!!!

[phil123]

absolutely