Chapter 17: Bathroom Experiment
The water shut off with a final shudder in the pipes. In the bedroom, Maddie flinched at the sound, her fingers tightening around the small, cardboard box. It felt heavy, absurdly so. The cartoonish mascot on the front—a smiling sun with a mercifully normal-looking digestive system—beamed up at her.
Eat the whole thing.
Kindra’s whisper, delivered with that chilling, scientific grin, echoed in her skull. The box promised “gentle, overnight relief.” This would be neither gentle nor overnight.
From behind the slightly ajar closet door, Kindra watched. She’d slipped in there after shoving Maddie into the room, a ghost in the shadows. Her breath was slow, deliberate. This was the experiment. The variable. Maddie, alone with the catalyst, with the trigger in her hand.
The bathroom door creaked open. Steam billowed into the hallway, carrying the clean, astringent smell of Chad’s body wash. He padded into the bedroom, a towel slung low around his hips, another scrubbing at his damp hair. He stopped short.
“Oh. Hey.” He seemed surprised, then remembered. “Right. You’re, uh… staying. Cool.”
He was so unbearably normal. Water droplets traced paths down the defined lines of his chest. Maddie’s mouth went dry. The box in her hand felt like a live wire.
“Yeah,” she managed. Her voice was a croak. “Kindra said it was cool.”
“Totally.” He gave her an easy smile, the one that made his eyes crinkle. He turned to his dresser, rummaging for clothes. The muscles in his back shifted under his skin. “Make yourself at home. I’m just gonna… you know.”
He nodded toward the pants he was pulling on. Maddie quickly turned her back, her face flaming. This was a mistake. A colossal, terrifying mistake. She wasn’t Kindra. She couldn’t command a room, or a person, with a look. She was just Maddie, holding a box of laxatives like a idiot.
But then she felt it. A low, internal gurgle. A deep, shifting pressure in her lower abdomen. It wasn’t pain. It was… presence. A filling.
The fuller her bowels, the larger her backside swells.
Her own secret, whispered in a diner booth, now a physical law thrumming inside her. The pills she’d dry-swallowed in the bathroom were doing their work. Fast.
Chad, now in a pair of soft gray sweats and no shirt, flopped onto the bed. He grabbed a controller from the nightstand and fired up the gaming console. The screen illuminated the room with a cool, blue glow, casting his profile in sharp relief.
“You game?” he asked, not looking away from the loading screen.
“Not really.” She stood rigidly in the center of the room, a guest who didn’t know how to be a guest. Another internal shift, more pronounced this time. A pressing, bloated sensation. She squeezed her thighs together instinctively.
“Suit yourself.” The sounds of a virtual gunfight filled the room. Crack-crack-crack. Reload. Boom.
The pressure built. It was a balloon inflating deep within her core. Her jeans, already snug from Kindra’s borrowed sweatpants earlier, began to feel tighter across the seat. She dared a glance down. The denim was straining, the seams pulling taut.
Her heart hammered against her ribs. This was really happening. Outside of the nest, outside of the reactive, shared energy of the trio. This was hers. A solo performance.
“You okay?” Chad’s voice cut through the digital noise. He’d paused the game. He was looking at her, a faint line of concern between his brows. “You look kinda… tense.”
“I’m good,” she said too quickly. “Just. Full. Ate a lot at the diner.” It wasn’t a lie.
Another internal roll, a liquid, insistent movement. The feeling was unmistakable now. Her body was preparing to expel the very thing causing the growth. A panic seized her—if she let it go, the swelling would stop. It would deflate. The power would leak away.
She clenched everything. Every muscle in her lower body locked down. A small, strained sound escaped her lips.
Chad put the controller down. “Maddie, seriously. You’re white as a sheet.” He started to get up.
“Don’t!” The word was a bark, surprising them both. She forced a shaky smile. “Sorry. I’m… it’s a girl thing. Cramps. I just need to ride it out.”
He sat back, uncertain. “You want a heating pad or something?”
She shook her head, teeth gritted. The pressure was monumental. It was transforming from a feeling of fullness into something structural. The fabric of her jeans groaned. A stitch near the back pocket popped with a tiny, percussive snap.
Chad heard it. His eyes flicked to her, then away, then back. A confused frown settled on his face. He was starting to see it, the impossible geometry of her silhouette against the dim lamp light.
Maddie turned towards the bookshelf, pretending to examine his collection of sci-fi novels. Dune. Hyperion. Neuromancer. The titles blurred. Her focus was internal, a battle of will against biology. She was a dam holding back a sea.
She heard the soft rustle of him standing up. Felt the shift in the air as he approached.
“Maddie…”
His voice was close now, just behind her left shoulder. Curious. Tentative.
The dam cracked.
It wasn’t a release. It was an intensification. The pressure didn’t diminish; it redistributed, solidifying, expanding outward. The growth wasn’t soft or gradual. It was a sudden, forceful proclamation.
Her backside swelled.
The denim, already tortured, could not accommodate the rapid, assertive roundness pushing against it. The seam running from her hip to the center of her rear split open with a sound like tearing canvas. A gasp ripped from Chad’s throat.
Maddie squeezed her eyes shut. She could feel it happening. The fabric parting. The cool air of the room hitting new, exposed skin. The incredible, undeniable weight of herself increasing, pushing her center of gravity backward.
She didn’t need to look. She could feel Chad’s gaze like a physical heat on the newly exposed curve. The stretched, pale fabric of her plain cotton panties, now the only covering, strained over a topography that was no longer hers. It was something else’s. Something she had made.
“Whoa,” he breathed. The word was all awe, no fear.
That did it. The awe was a fuel. The pressure inside her surged again, a second wave. Another internal command. More.
The growth continued. It wasn’t just her rear now. It was her thighs, swelling to meet the new mass, her hips broadening to support it. Her cotton panties, simple and white, dug into the burgeoning flesh, the elastic creating a deep, dramatic crease. They were a flag planted on a conquered continent.
She let out a shuddering breath and turned around.
Chad was staring, his mouth slightly open. He wasn’t retreating. He was leaning in, captivated. The game on the screen was forgotten, casting its silent, frantic light over the scene.
“See?” Maddie whispered. Her voice had changed. It was lower, thicker with a confidence that came from the sheer physical fact of her. “See what I am?”
She took a step toward him. Her gait was different. A sway had entered it, necessitated by the new weight she carried. It was hypnotic.
Chad took a step back, but his eyes never left her. They were wide, dilated in the low light. “How…?”
“You,” she said simply, taking another step. The floorboard creaked under her new weight. “Looking. Wanting.” Another step. He was against the edge of the bed now. “It happens when I’m… full. And I am so, so full, Chad.”
She was upon him. The immense, soft curve of her lower body pressed against his legs, pinning him gently against the mattress. He could feel the heat radiating from her, the solid, abundant reality of her.
His hands came up, not to push her away, but hovered in the air, unsure where to land. “Maddie, I… Kindra…”
“She’s watching,” Maddie murmured, leaning in closer. Her lips were near his ear. “She told me to do this. She wants to see.” One of her hands found his, and she guided it slowly, deliberately, behind her. She placed his palm flat against the breathtaking expanse of her bare, swollen cheek.
The touch was electric. For both of them.
Chad’s fingers splayed, instinctively kneading the impossibly soft, heavy flesh. A low groan escaped him, part shock, part pure sensation.
From the darkness of the closet, Kindra let out a soft, shuddering breath of her own. Her own body responded to the tableau, a sympathetic echo tingling in her veins. But she stayed still, a silent priestess observing the ritual.
Maddie leaned into his touch, her eyes closing. This was power. Not the destructive, angular power of Kindra’s growth, but something slower, softer, more engulfing. She was a tide, and he was being gently submerged.
“Do you like it?” she whispered.
He couldn’t speak. He nodded, a jerky, frantic motion. His other hand came up to join the first, both now exploring the vast new landscape of her.
Then, his thumbs hooked under the straining band of her cotton panties. It was a question.
Maddie opened her eyes. They were dark, glazed with triumph. She gave a single, almost imperceptible nod.
He began to pull them down.
The elastic slid over the colossal curve, revealing inch after inch of pristine, expanded skin. The sight was profoundly intimate, shockingly vulnerable, and utterly lewd all at once.
Just as the fabric reached the apex of the curve, the bedroom door flew open.
Kindra didn’t enter. She filled the doorway.
She hadn’t grown to mall-stockroom proportions. This was more targeted, more theatrical. She was eight feet tall, maybe nine, just enough so her head brushed the top of the door frame. Her dress was torn at the shoulders and hem, but it still clung to her now-monumental form. She stood there, a giantess in a broken fairy-tale, her black-painted toes curling over the threshold.
Her expression wasn’t angry. It was rapturous. She’d seen everything.
“Perfect,” she breathed, her voice a room-filling vibration.
Chad jolted backward, tumbling onto the bed. Maddie stumbled, the sudden loss of his support making her wobble on her new foundation.
Kindra took one step into the room. The floor shuddered. Her gaze, vast and pleased, swept over Maddie’s revealed, massive form, then landed on Chad’s stunned face.
“You see?” Kindra said, her tone one of profound satisfaction. “She doesn’t need my permission. She just needs a reason.” Her giant eyes locked onto Chad’s. “You’re a very good reason.”
She took another step, closing the distance. She loomed over the bed, over Maddie, who stared up at her with a mix of fear and adoration. Kindra reached down, her hand large enough to cradle Maddie’s entire head. She didn’t touch her. She hovered.
“You did so well,” Kindra cooed to Maddie. Then she looked at Chad, who was scrambling back against the headboard. “But the experiment isn’t over.”
Her focus shifted. The energy in the room, which had been centered on Maddie’s swollen form, bent toward Kindra like iron filings to a magnet. A familiar tremor ran through her colossal frame.
She was still growing.
The air in the room thickened, vibrating with Kindra’s silent expansion. She was a tower of warm, fragrant flesh, her shadow swallowing the lamplight. Maddie watched, mesmerized, her own colossal body humming in sympathetic response. The internal pressure, held so tightly in check, began to pulse in time with Kindra’s growth.
A deep, liquid groan echoed from Maddie’s stomach. It was loud, undeniable.
Chad tore his gaze from Kindra and stared at Maddie’s midsection. “What was that?”
“Full,” Maddie gasped, her voice strained. The word was a pathetic understatement. Her intestines churned, a visceral tide shifting and building behind a failing wall. The laxatives were a demolition crew deep in her core. She could feel the sheer, impossible volume of it all, a hot, dense mass preparing for its birth.
Kindra’s giant head tilted. Her smile was a crescent moon of anticipation. “It’s time, Maddie. Don’t fight it. Use it.”
The command broke her last thread of restraint. The need to clench was overridden by a sharper, more primal need: to dominate, to expel, to claim. Her eyes, wide and dark, fixed on Chad.
He saw the shift. “Maddie, wait—”
She moved with surprising speed for her size, a lunge that was all forward momentum. Her hands, strong now, shoved hard against his chest. He flew backward off the bed with a startled yelp, landing on the floor with a thud that shook the bookshelf.
Before he could scramble up, she was on him.
She turned, her back to him, and lowered herself. It wasn’t graceful. It was tectonic. The vast, pale orbs of her backside, already monstrously swollen, descended toward his face. The sight was absolute: the deep, shadowed cleft, the perfectly tanned skin of her immense thighs straining, dimpled with the weight, flanking him like soft, living walls.
“Stop! Maddie, fuck!” Chad’s words were muffled, panicked, his hands coming up to push against the overwhelming flesh. His palms sank into the unbelievable softness, finding no purchase, only a warm, blubbery resilience that yielded and then enveloped.
She settled her full weight down.
The world for Chad became a hot, dark, vanilla-scented universe. Her asscheeks, each one larger than his head, pressed flush against the sides of his face, sealing him in. He could hear the thunderous gurgles and groans from her stomach directly through her body, a subterranean storm. He struggled, his legs kicking weakly.
“Eat,” Maddie commanded, her voice trembling not with uncertainty but with the effort of containment. She rocked forward slightly, the pressure shifting. “Do it. Or you’ll suffocate.”
Trapped and terrified, he obeyed. His tongue, frantic, found her. The taste was musky, human, layered with salt and the sweet hint of her sweat. She gasped above him, a sharp, shocked sound that morphed into a moan. The vibration traveled through her and into his skull.
Her thighs, thick as tree trunks and just as solid, clamped against his ears. Her stomach let out a long, rolling growl, the sound of final formation. The internal dam shattered.
“I can’t—I can’t hold it—” she whimpered, the words not for him but for the reality breaking loose inside her.
It began.
A hot, constant stream poured from her. It wasn’t a single act but an unbroken, relentless expulsion. The sheer volume was impossible, a torrent forced out by the chemical tyranny of the laxatives. It flooded over Chad’s chin, his neck, pooling warm and dense on his chest.
And as it poured out, the power rushed in.
The released pressure didn't shrink her. It fueled her. A sharp, electric jolt shot through her, and the flesh beneath his hands began to swell anew. It pushed outward, growing softer, vaster, heavier.
“Oh god,” Maddie chanted, “oh god, oh god.”
Her buttocks expanded, softening from firm blubber into a billowing, endless softness. They swelled laterally, pressing against the legs of the bedframe with a wooden creak. Then they swelled downward, the immense, tanned spheres consuming more of Chad. They covered his face completely, then his shoulders, the warm, smooth skin sealing over him like rising dough.
He was buried. The only air was hot, stale, and perfumed with her release, which showed no sign of stopping. The constant, soft pressure of the outpouring was now against his sternum, a warm, living weight.
Still, she grew. The growth accelerated, fed by the brutal, physical truth of what was happening. Her ass became a behemoth, a pillows of flesh that began to cover his torso. His struggling hands were pinned at his sides, then engulfed by the advancing, tan wave of her hips and thighs.
Kindra watched, one giant hand pressed to her mouth. Her own arousal was a distant thrum, overshadowed by the monstrous, beautiful spectacle. Maddie was achieving a scale Kindra had never dared, driven by a different, more visceral engine.
Maddie’s head fell back, a cry tearing from her throat as another wave of growth crested. Her backside blotted out the rest of Chad. Only his feet, twitching feebly, protruded from beneath the monumental curve of her right thigh.
The relentless, pouring expulsion continued, a grotesque proof of the power surging through her. She was so big now that the specific point of contact—the place where he had been—was lost, swallowed whole by the sheer geography of her.
Chad was gone, completely absorbed beneath the living, breathing, endlessly expanding monument of her flesh.
The only sound was the wet, rhythmic drip from the saturated bed sheets onto the floorboards. Maddie panted, her chest heaving, a stunned silhouette against the lamplight. She was a mountain of soft, tan flesh, utterly still, her human top half absurdly small atop the vast base. No part of Chad was visible.
“Maddie.” Kindra’s voice wasn’t loud, but it cut through the humid air. She had shrunk back to her normal height, her dress hanging in tatters. She approached the bed, her bare feet silent on the wet carpet. “Look at me.”
Maddie’s head turned slowly. Her eyes were glassy, unfocused, swimming in the aftermath of raw power. “I can’t… I can’t feel him,” she whispered. “Is he—”
“He’s fine. He’s breathing. I can see the sheets moving.” Kindra’s tone was hypnotically calm, a steady anchor in the storm. She placed a gentle hand on Maddie’s trembling shoulder. “You were incredible. You are incredible. But you need to let him go now.”
A tear traced a clean line through the sweat on Maddie’s cheek. “I don’t know how to stop.”
“Yes, you do.” Kindra’s thumb stroked her collarbone. “It’s the same as starting. Just in reverse. Breathe with me.” Kindra took an exaggerated, slow inhale, holding Maddie’s panicked gaze. “In… and out.”
Maddie mimicked her, a shaky, gulping breath.
“Again,” Kindra commanded softly. “Slower. Think about releasing the tension. Think about making space.”
Maddie closed her eyes. Her breathing deepened, hitched, then evened out. For a long moment, nothing changed. Then, a subtle ripple passed through the massive expanse of her thighs, a slow retreat like a tide reluctantly pulling back from the shore.
The mountain began to subside.
It wasn’t a collapse, but a gentle, controlled deflation. The immense sphere of her rear began to lose its impossible firmness, softening further before slowly diminishing in volume. Maddie’s breathing became the only measure of time, each exhalation pulling her body back inwards, reclaiming its human shape from the monstrous one.
Chad’s shoulder emerged first, pale and slick. Then his arm, flailing weakly. His head came free with a wet, gasping suck of air. He coughed, sputtering, his face a mask of stunned disbelief. He didn’t scramble away. He just lay there, pinned from the waist down, staring up at the ceiling as the weight on his legs lessened.
Finally, it was over. Maddie slumped forward, catching herself on her hands, her body shuddering with exhaustion. She was back to her normal size. Almost.
Kindra’s eyes, sharp and analytical, catalogued the differences. The soft, heavy curve of Maddie’s rear remained pronounced, a permanent souvenir of the expansion, resting on the backs of her thighs with a new, weighty grace. Her thighs themselves, once slender, now carried a thicker, powerful curve, the muscle and soft tissue forever altered.
“There,” Kindra murmured, a note of profound satisfaction in her voice. “See?”
Chad finally pushed himself up onto his elbows. He looked from his own soiled torso to Maddie’s transformed body, then to Kindra. His expression cycled through revulsion, awe, and a dazed kind of reverence. “What… what just happened?”
Maddie turned to look at him, her eyes clearing. She saw the mess she’d made of him. A fresh wave of shame washed over her face, quickly followed by a defiant glint. “You happened,” she said, her voice hoarse. “I happened.”
Kindra helped Maddie to her feet. Maddie stood differently, a slight, unconscious sway in her stance to accommodate her new center of gravity. She looked at Chad, really looked at him, covered in the evidence of her power. A slow, tired smile touched her lips.
“You okay down there?” she asked, her voice regaining a sliver of its earlier teasing edge.
Chad wiped a hand across his mouth, smearing it worse. He let out a weak, disbelieving laugh. “I have no idea.” He looked at Kindra, then back at Maddie’s new form. “But… holy shit.”
Kindra stepped between them, her own bare feet squelching on the damp carpet. She placed a hand on each of their chests, one sticky, one clean. “Now you both know,” she said simply. Her gaze settled on Maddie, and a genuine, unguarded affection shone through. “And now I know.”
She leaned in and kissed Maddie, deep and slow. Maddie melted into it, a soft sigh escaping her. When they parted, Kindra turned and pressed her lips to Chad’s, tasting salt and something else. He responded instinctively, his hands coming up to her waist.
Kindra pulled back, a queen between her subjects. “Clean up,” she said, her tone leaving no room for argument. “Then meet me in the living room. We have things to discuss.” She turned and walked out, the shredded hem of her dress whispering against the floor.
Left alone, Maddie and Chad stared at each other. The air stank of sweat and vanilla and the sharp, organic aftermath of her release. Maddie shifted her weight, the new fullness of her body feeling both alien and deeply, irrevocably right.
“I, uh…” Chad began, looking down at himself. “I really need a shower.”
“Yeah,” Maddie said, a ghost of her diner smirk returning. “You really do.” She watched him struggle to his feet, her eyes lingering on the way he moved, the way he looked at her now—not with fear, but with a stunned, desperate hunger.
She followed him to the bathroom, her new hips brushing the doorframe. She didn’t ask permission. She just walked in behind him, the steam from his earlier shower still clinging to the tiles. He stood under the spray, letting the water sluice the worst of it away. Maddie leaned against the sink, watching, her thickened thighs pressed against the cool porcelain.
“You’re not scared?” she asked, her voice almost lost in the shower’s roar.
Chad turned his face into the water, then looked at her through the fogged glass. “Terrified,” he said honestly. Then he grinned, that easy, crinkle-eyed grin she’d craved. “Also kind of really, really into it.”
He reached out a wet hand, not to pull her in, but in invitation. Maddie looked at it, then at her own changed reflection in the misty mirror. She smiled, a real one, full of a dark and thrilling pride.
She took his hand and stepped into the spray, her new body settling against his with a familiar, yet utterly new, pressure.