An Explicit Female Muscle Growth story
I want this!By MagnusMagneto [ https://www.MagnusMagneto.com ]
Version 1.1
Retouched August 2018
Approximately 9,700 words
Previously on A Day at the Park:
Your girlfriend Helen gained more power and strength over the course of the previous chapter. You’ve deduced that she’s being empowered by the sun, and somehow, your semen. On top of this, Helen seems to have developed the ability to force sunlight into her body, instantly gaining more power on the spot – although, for reasons you don’t understand, she seems to be incapable of doing this too frequently.
Early in the previous chapter, Helen did one-armed push-ups and became stronger. Then she challenged you to push against her – your entire body against her single arm – and you were unable to budge her at all. She took the opportunity to treat herself to another power-up, widening the gap of strength even further.
Helen continued to tease and play with you. Before long, she outgrew her old tank-top, tearing it to shreds with a mere flex, summoning huge 18-inch biceps. At your request, Helen demonstrated her strength by picking up a nearby log and shattering it between her mammoth thighs.
The chapter came to a close with you and Helen discussing the possibility of other women in the world becoming empowered by the mysterious red sun. You concluded that you trust Helen with power more than anyone else, so despite your initial misgivings, you’ll do everything you can to make her as strong as possible.
1.) Briefly after Chapter 2
You lay on your back, utterly exhausted, staring up at the sky. It seems to have become darker yet – now a shade closer to blood red.
–
Ten minutes ago, you started on your promise to help make Helen as powerful as possible. You tried to last as long as you could, to savor every moment, but it was useless. Between her overwhelming presence, the feeling of her muscles between your fingers, and her ability to ‘milk’ you, Helen was too incredible to resist. Another load passed into her.
As the superhuman woman beneath you grew, her entire form became wider still – the disparity between your sizes increased again. She became more than two times broader than you. You looked increasingly weak in comparison.
Your task finished, you reflexively started to get up – but Helen pulled you back down. With surprising agility, she flipped positions with you – placing your back firmly on the ground underneath; all the while keeping your member still inside of her.
“I think you’ve got more to offer…” she cooed with a wink before reaching down and planting a kiss on your lips. Her voice became more alluring with each passing power-up: a touch huskier, a bit breathier – yet still retaining its sweetly high feminine pitch.
You wondered if it was possible – could you really have more? You just provided quite a lot – yet you were still hard…
But Helen persisted. She milked you with increasing mastery over her contractions. You felt the moist, firm muscles coalescing with rhythmic pace, perfectly pleasing you.
“Please… help me become stronger…” she whimpered between groans of ecstasy.
For a brief moment, the formerly weak and submissive Helen you used to know peaked through. Your desire to make her happy and fulfill her wishes won over, and somehow you managed produce more of the empowering juice. As you released again, Helen stretched upward towards the sky, letting out a primal utterance of sexual bliss.
As Helen grew, your vision was increasingly filled with the sight of her, and less of the horizon. Slowly and deliberately, Helen performed a double-bicep pose; two cantaloupes of rippling muscle brimmed to life, each with a distinct peak erupting upward. You realized that her hands had remained the same small feminine size they were yesterday, which juxtaposed sharply against the thick forearms next to them. The upper portion of Helen’s forearms alone exceeded your entire bicep.
Helen’s thick, bulging, square-like pectorals also grew again; the rift between them became more pronounced, and they jut further by another half-inch. The network of web-like striations within them deepened as well, extending further – slowly developing into a hydra of muscular development.
The most visceral marker of Helen’s progress were her thighs. As her legs flanked yours, you felt your own lower body compressing slightly to make room for her increasing girth. Helen’s staggering quadriceps grew simultaneously upwards and outward; each leg now thicker than your entire waist.
And while staring at her waist, you marveled at its muscular definition. Over an inch of space sat between the center of her rippling abs. The individual bricks of muscle intimidated you with their size.
After feeding on your admiration for a little longer, Helen finally got up. Not an ounce of your juice dripped from her exposed love. You assumed her body physically absorbed every last drop.
And thus, we return to the present…
–
Still defeated, all you can do is merely lay on the ground and stare up at Helen.
A short while ago, she proved that she held more strength in a single arm than you did in your entire body. Now Helen’s significantly larger than that, and undoubtedly far stronger. You wonder just how great the disparity between the two of you has become.
You imagine Helen with as much power in a single finger as you hold your entire body. You shiver uncontrollably with lust, fear, and curiosity as you fathom that concept.
While you lazily watch, Helen explores her body. She grins madly and runs her fingers over the thick slabs of power on her tummy. “I’ve always wanted abs,” she purrs before smacking them a bit, creating a loud, hollow thudding noise.
Helen’s traps and back have spread so far that it looks like she’s taller now. There’s no weakness in her posture; she stands proud and upright – ready to face any challenge, and endlessly absorb more energy to further her goals. The events of today have handed Helen the opportunity to seize real, tangible power – allowing once-buried facets of her personality to surface.
“Gimme more power!” Helen shouts with her arms spread out. Like earlier today, you watch the light around her warp, as she somehow bends the sunrays to her will. And once again, all her muscles grow slightly larger. ‘Though not to the same extent as after sex,’ you note.
“God, I feel so strong, I wonder if I could…” Helen lifts one of her trunk-like legs high into the air; you’re surprised that she’s so flexible considering the sheer amount of muscle on her frame. She smashes it down with as much force as she can muster. You hear a loud crash and see a small crater form in the hard dirt where her foot lands – cracks ripple out around it.
A moment after her foot connects with the ground, you hear a loud rumble, and the ground beneath you quakes slightly. Helen giggles wildly, “Just a matter of time until I can make earthquakes!” she squeals with delight.
She playfully punches the air a few times; their force creates a crisp, loud whooshing sound.
“More, more, more!” she cries out like a spoiled child. You see the sunlight warp again, her muscles greedily absorbing more energy as they grow even larger, “Yes! Turn me into a goddess!”
Helen’s eyes light up, glowing a supernaturally dark yellow.
Your girlfriend yells sharply, as if she’s summoning all her energy – and a moment later… ‘Is she… floating?! Or is that levitating?’ Only a couple of inches, but her feet are definitely not touching the ground…
After hovering for a few moments, Helen falls back down to the dirt. Her eyes return close to their normal color – but are still a shade towards yellow.
What just happened? Chills run down your spine as you try to parse the events.
Helen saunters over towards you, standing above with her hands on her hips. There is so much muscle surrounding her skeleton that you wonder if she’s bulletproof yet. ‘Yet’, you catch yourself thinking, ‘I guess it’s inevitable that she will be, isn’t it?’
For better or for worse, Helen doesn’t mention the hovering incident.
“If we’re ever going to reach the summit, we need to get moving!” Helen giggles as she gently strokes your half-firm erection with her feet.
You try to get up, but you’re so utterly exhausted from the day’s events that you collapse back onto the ground.
Helen bends down and effortlessly scoops you up into her brawny arms. “Guess I’ll just have to carry you!” she says before jettisoning off.
2.)
Shortly into your run, Helen transitions you onto her shoulders – which is a bit awkward due to the height difference. As a result, your proportionately long legs droop far below her waist, threatening to skim across the ground. Fortunately, they don’t.
The wide expanse of Helen’s back and shoulders provides a surprisingly comfortable seat. Her skin is softer than silk now.
Riding atop of Helen, you feel safe and secure. Nothing could possibly challenge her, and if something did, she’d become stronger and overcome it.
Your train of thought is interrupted by Helen saying, “Alright bucko, time to pay the toll!”
“The toll?” You reply – though you have an idea of what she’s referring to, and think, ‘I’m not entirely certain how the logistics of it would work in this-‘
Your train of thought is interrupted again by one of Helen’s hands deftly unbuttoning your pants, while still perfectly maintaining the course.
“Surprised? My manual dexterity seems to be improving as well,” she says.
You’re in no position to argue as her firm, velvet grip has already encircled your shaft. She deftly pumps you, and it doesn’t take long for another release.
While still jogging, Helen expertly cups most of the discharge into her hand. She brings it to her mouth, gulps it down, and licks her hand clean.
A few moments pass. Suddenly, you feel the powerful muscles beneath shifting – your magic semen worked again. The seat becomes slightly more comfortable as Helen’s back widens further, her shoulders thicken, and her traps provide a fuller cushion.
“Hang on, time to speed up!” she announces.
“Wait, you’re already going so fa-” You interrupt yourself as you accelerate. You crouch down and cling tighter to your girlfriend’s shoulders, and hope that you’ll survive the journey.
2.5)
After a few more minutes of rapid travel, you come to another clearing. Helen kneels, and you dismount. As your feet touch the ground, you’re reminded of how exhausted you. It’s difficult just to stand up straight. Helen, of course, looks stronger and prouder than ever. Her energy reserves have only grown, despite constantly taxing them the past few hours.
“I could sense you were fading up there,” Helen says. Her voice is warm, coated with sincere concern.
“Could sense it?” you reply.
Helen nods. “Tough to explain, just something about the way you were wavering around and having trouble just holding on tight.”
You feel a little embarrassed.
Helen reaches up and places her hands behind your neck – thick forearms flank you. With an iota of her strength, she pulls you down towards her, and locks lips. She tastes and smells even better than last time. You grab onto one of her breasts with your right hand, and a bicep with your left. Her breast is soft and firm – covered with thick, smooth skin; contrasted with her bicep, which is harder than anything you’ve ever felt before – also covered in velvet.
Suddenly Helen breaks the kiss off, grabs onto your shirt, and with a swift motion tears it straight off – destroying the garment in the process.
“Hey… Weren’t you the one against being exposed in a public place earlier?” you say.
Helen shrugs, “Things change babe. Especially today.”
She takes in a deep breath and performs a ‘most muscular’ pose, forcing the web of thick muscles along her pecs, traps, and upper arms to erupt with life. She grunts, somehow forcing even more blood into them. Her bra is brought past its breaking point, and snaps in half, leaving Helen fully exposed. “There. Now we’re both shirtless.”
You stare slack-jawed at your girlfriend’s breasts. They’ve gained size, perkiness, and are a more aesthetically appealing shape.
“No need for a bra when you’ve got pecs like these!” Helen giggles before tensing the muscles in question – her breasts dance on command. “And let’s be real, who needs clothes with this body?” She places her hands behind her head, a classic confidence pose; immense lats flare out, exuding dominance.
It’s amazing to you how much better developed Helen’s muscles are than your own. Each individual muscle on her frame is not only far larger, but harder too with more lines of definition.
You glance down at your torso – it’s lithe, lean even, with some traces of muscular definition; if you to twist your midsection and crunch downward, you kinda see your abs popping out. But Helen’s tummy dominates yours, each individual brick of power is two times the size of yours and pushes out significantly further.
Your arms are like your stomach – little fat on them, and you can see the outline of your bicep without flexing. You even spot a small vein running alongside it. And yet, all the muscle in your arm doesn’t even match one of Helen’s triceps alone.
Helen can tell that you’re comparing your body to hers. She brings her right arm to the side of your abdomen. “Just a matter of time until this bicep is bigger than your entire waist,” she says with a laugh. “Of course, my thigh is already there.”
“I’d say that your waist is there as well,” you quip.
“Mmm… Maybe.” Helen stands near you, and your suspicion is confirmed – the muscles in her torso have considerably thickened her waist. Despite this, her figure is more of an hourglass ever before thanks to the development of her upper and lower halves. “Ironically babe, when we got here I was the one committing to a dieting plan. Yet, I think that you’ll have to start watching what you eat once we get home. Not that you need to lose anything now, but we certainly don’t want you to lose your, uhm, boyish little figure.” She giggles before pinching your bottom; her fingers effortlessly compress your glutes.
“What about you? Won’t you have to start dieting too?”
Helen bursts out into laughter. “Babe. Come on. Presuming I even have to eat anymore, can you even imagine how fast my metabolism is? Mmm… I’m looking forward to it already – eating all manner of cookies, cakes, pies, whatever I want in front of you, while I just get leaner, meaner, and buffer every day!” she giggles wildly. “And you’ll still have to watch your calories and carbs!”
“It’s still setting in. The sheer number of implications involving today’s events…” You murmur.
“If I didn’t know any better, I’d say you prefer things this way,” Helen says.
You remain silent.
“I know I certainly do!” she cheers.
“I like it Helen. It’s just… I dunno, I would’ve enjoyed a few upgrades as well. Even if they weren’t as crazy as yours.”
“Well… there’s no way around it babe, this thing is definitely bigger,” Helen says before bringing her fingers down to your shaft – her hand feels much comparatively smaller than yesterday, so she’s right. “These too,” she points to your testes. “Must be how you’re making soooo much juice for me!” She giggles and smacks her lips.
Helen continues, “So, let’s look at like this way – my body is evolving to become all-powerful, and yours is evolving to give me even more strength!” She giggles. “It’s a uh, symbiotic relationship, I think it was called in biology class.”
“I’m not too sure what I’m gaining out of the deal,” you reply.
“I mean your Johnson is at least 8 inches now… Pretty wide too…”
“Yeah… so just like you said, you change to become all… ultra-powerful, while I change to better pleasure you!”
“Mmhmm!” Helen agrees.
You let out a sigh of exasperation.
“This is really how it ought to be, you know?” Helen winks.
“Like what?
“Me: ultra-strong, with unlimited stamina, near invincibility, and the capability to keep gaining more and more power.” She shifts her attention to you, “You… the same as always, but with a bigger dick and even hornier than usual.” She giggles madly.
“I think all this power is going to your head Helen.”
“Really?” She raises a brow. “I’m kind of disappointed you think I’m different mentally. I’ve always been like this – you know, with a bit of a dominant streak. It’s just that now I have a body to back it up!”
It’s true. While those dominant tendencies have now been amplified exponentially, there’s no denying that this is more or less what you imagined would happen if Helen was in one of your FMG stories.
3.)
“Time to continue pushing this body,” Helen says as she scans the area for something to test her strength with.
Helen spots a large rock, (or perhaps a small boulder), waltzes over to it, and picks it up before moving back over to you. She tightly wraps her fingers around the stone, and you have a good idea of where this is headed. She presses against the rock, her muscles bulge and ripple – her forearms bunch up to a size you thought would be impossible attached to such small hands.
She lets out a feminine grunt, and determination creeps into her face. You realize that this is the most challenging thing Helen has encountered yet. Despite her effort, the rock remains unaltered.
“I don’t think you’re quite ready for that…” you say.
Helen gives you a death glare before returning to the task at hand. She grunts more loudly and tries harder – but even with renewed determination she’s unable to crush the rock.
You say, “I think you’ll need some more help from me if you ever want to shatter that thing.”
“Hmmph! You may think you’re so important to my ascension, but that couldn’t be further than the truth!” she shouts with childish fury.
“Oh, come on Helen, there’s no way around it. All of your major power ups come from my spunk.”
She takes in a deeper breath, forcing her body to grow stronger to meet the task at hand. Her forearms, triceps, and shoulders tremble and quake. Then right before your eyes they grow slightly.
Cracks form on the rock’s surface, and you hear it crumbling a little. Helen takes another deep breath, collects herself, then pushes with everything she has; deep splits form down the center the stone, and a moment later it collapses and shatters between her fingers, leaving smaller chunks and pebbles.
Helen grins wildly and she dusts off her hands, brushing aside the rock’s residue.
“You were saying?” She winks.
“Um… Well, you know… You had simply loosened the rock up beforehand…”
She squints at you slightly before turning away in an exaggerated fashion and locating a second rock. After retrieving it, she collects herself and repeats the feat again. This time the rock’s foundation crumbles sooner, and Helen doesn’t exert herself as much. She grunts cutely before going all out, and a few moments later, the second small boulder is also reduced to debris.
“If I’m strong enough to crush a boulder like that, can you even imagine what I’m going to be like after this load?” Helen says in a low voice as she struts towards you – like a lioness claiming her prey. Her tone and demeanor send chills down your spine.
Part of you wants to resist. You fear so much power being accumulated by one individual. But your love for Helen, (and your love for muscular women), overrides this: you’re ready to give her even more.
“I thought you didn’t need me anymore,” you quip, still trying to hold out some snark in the face of Helen’s increasingly overwhelming superiority.
“Oh, don’t get your panties in a bunch,” she teases with a giggle.
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