An Explicit Female Muscle Growth story
I want this!By MagnusMagneto
Version 1.1
Originally Published January 2017
Retouched September 2018
Approximately 8,500 Words
1.) Shortly After Chapter 3
Helen is scarily strong now, and you’re certain that given enough time she could accomplish this feat… but to lift a tree already? Whether or not she can do it doesn’t matter. Her fingers have already dug into the wood, and she’s pulling with all her might. From where you sit, you can see the muscles in her back flare with boundless vigor; they bulge so much that it’s frightening to behold.
The ground beneath Helen trembles and her feet sink a few inches into the ground, creating a pair of craters beneath. She starts absorbing more sunlight. Her incredible shift and grow again; her legs and arms lengthen another inch – giving her better leverage uprooting the tree.
Then you hear it: the sound of wood creaking. Slowly, Helen is lifting the tree. Its roots stubbornly cling to the earth beneath her; those closest to the trunk are upended – unduly removed from their resting place. You see that Helen’s fingers are digging more deeply into the wood, giving her a better grip. If she were to let go now, there would be a deep imprint left behind.
A loud, beautiful grunt emanates from her powerful throat, filling the air. More creaking follows, and the tree ascends another inch, as does its roots. You can see its outline surfacing. The roots are like a vast labyrinthine spiderweb. This is no straggler – the great tree took many decades to grow to its proud height; and Helen threatens to dominate it with power gained in a few hours.
Helen’s grunts have turned to yells. She sounds like a character from a video game or anime gathering her strength. Which she effectively is, as she somehow absorbs even more of the sun’s power.
Her glutes, hamstrings, and calves are the focus of this power up. They widen, thicken, and harden all at once. The tiny gap between her thighs tightens – less light pours through. Her calves jut out so far that the individual halves of her diamond-shaped muscles have their own splits of definition; and her hamstrings bulge out further than your quadriceps do.
You want to reach out and grab onto each individual engorged tendon.
The power-up worked. The rest of the tree’s stubborn roots emerge from underground, disrupting the dirt and grass with them. The bulk of the tree floats midair a few inches.
Much like your own experience with Helen, as the tree’s power wanes, hers grows. You find a sharp irony in how the tree, which grew to its mighty size by photosynthesizing the sun’s energy, is being destroyed by a woman who seems to be doing the same.
Momentum was already on Helen’s side, and without roots anchoring the tree, the tide has turned. Helen holds the entirety of the great oak held above her head – but her strength wavers, and she drops it onto her brawny, rounded shoulders.
The tree is firmly on her back, but something is amiss – Helen isn’t standing steady. Her entire body wavers, which is downright terrifying with a multi-ton weight bearing down on her. “Need help!” she yells.
“How can I possibly help?!”
“Think with your Johnson!”
You understand. Without delay, you rush over to her, and as you close the gap, Helen’s new upgrades become more apparent. Her shoulders now look like a pair of small heads, between them lie a collection of traps so thick they threaten to swallow her neck whole; the smaller muscles of her back have developed beyond what you’ve seen on anatomy models; even her erector spinae has thickened, the individual bumps of bone protrude out more—a quick glance shows the same to be true of her elbows—a necessary improvement to accommodate her muscle and strength.
But there’s no time to gawk, despite your desires. You pivot in front of Helen, focus on the task at hand, and start stroking yourself.
Your dark sense of humor kicks in as you think about how ‘this jerk off session is literally a matter of life and death. Can’t get distracted though, Helen needs my help. In fact, if Helen falls here, the tree might crush us. And while she might survive injury like that, I don’t know if I will…’
‘No time for that!’ Instead, you think, ‘All I have to do is give Helen another power up, and she’ll be able to manage the tree with ease.’ The concept of your girlfriend possessing that much strength motivates a quick and easy climax.
A huge spurt squirts out, landing directly onto her exposed chest. It quickly seeps into her skin. She groans with pleasure. The heaving pecs quiver before growing again, her breasts standing higher and prouder.
It’s a good start, but you need to make sure your girlfriend doesn’t die. You carefully collect the rest of your discharge into your palms; it disgusts you at first until you visualize it as a ‘magic lotion’ that will make Helen stronger.
After collecting the lion’s share of your ejaculate, you divvy your ambrosia between both hands, and work the lotion into her biceps and triceps. With the remainder, you thoroughly explore the muscular crevices of her underarms, and take a moment to enjoy the knotted ridges of tendon and bone. Covered in sweat, sun, and cum they glisten spectacularly.
Her muscles quickly drink in your gift and grow ever mightier. Helen’s deltoids have become so large that you can’t wrap your hands around them; her pecs are three times larger and denser than your own; and her upper half encroaches on becoming twice as broad as yours.
“Legs! My legs need it too – losing balance!” Helen yells. “Foundation isn’t strong enough!”
You’re not sure if that’s true, but there’s no time for doubts. You grab yourself and get to work but find that you need more stimulation. You move closer to Helen, crouch down a bit, and manage to stick the entirety of your girth into the deep muscular crevice inside the center of Helen’s thigh.
Surrounded by the tremendous warmth and energy radiating from the leg, you’re overwhelmed with pleasure, and release once again.
Your offering is immediately absorbed into the mammoth fold of feminine power, and Helen groans with delight. “Get the other leg!” she demands – your work isn’t done yet.
You withdraw from Helen’s left leg and move over to her right. Despite having released twice within the past minute, you’re ready again. You rub yourself on top of the other leg.
Your mind considers that Helen was able to lift that tree, and now you’re about to give her a third release since then. The thought of how powerful Helen may become is enough to coax you into another orgasm – which spurs on a growth spurt for that leg.
Helen slowly acclimates to the immense amount of power at her disposal and stands firm – still holding the tree above her head. “Getting easier to hold this!” she announces.
Helen’s expression shifts from pained effort to triumph. Her toothy grin is coupled with a hint of well-deserved arrogance. “May as well keep going since we’ve come this far, right?” she says before squatting down with the immense weight still on her back. Helen’s quadriceps bulge out even more – the gap between her thighs reduced to a mere pinprick.
Slowly, Helen stands back up, and her legs lengthen again as she gains another inch of stature; the gap widens slightly. You’re still taller than Helen, but the difference is only a few inches now. She descends again, demonstrating greater control. She cheers, “Even this is getting easy for me!”
Eventually, Helen becomes bored of squatting with the tree. She places it on the ground, careful to not haphazardly toss it. Even with her caution, the landing makes a massive crash. You feel a tinge of guilt as you stare at its once-majestic roots helplessly exposed – a noble life form snuffed out. Hopefully Helen keeps her feats of destruction to a small scale.
2.)
Helen’s confidence is sky-high. It was rising all day, but after lifting and squatting a tree, she feels invincible.
She lazily floats a few feet into the air, and somehow manages to cross her gigantic legs – creating a dense wall of shapely flesh. Despite her muscular definition, there’s an exaggerated feminine shape to Helen’s figure and curvature. The pose is regal – she’s nascent goddess who knows nothing can hope to stop her.
“Well dear, now what?” Helen asks in a low, rich voice – slowly levitating towards you.
“What are you going to do with that?” you ask, pointing at the uprooted tree.
Helen shrugs. “At the very least, it’ll be a useful weight to continue my training.”
“Oh?”
Helen nods. She floats back over to the tree and lands next to its center. She bends down and puts her hands on it. You hear the wood creak and crunch as Helen’s fingers dig into it – her forearms flare out. She grunts loudly and pulls at the wood with all her might.
As the entire uprooted tree moves, its size unsettles you. Despite her mass, Helen is still tiny compared to it. She deadlifts the tree. Her vast back flourishes with life – dimpled deltoids and triumphant traps explode as they provide enough power to hoist the great oak. She holds it steady for a few seconds before putting it back down.
Helen starts performing deadlift repetitions with the tree. You wonder how long until she’s able to lift the whole thing overhead with a single arm. And just a few minutes ago you had to provide an emergency power up to stop it from crushing her.
Unsurprisingly, each repetition seems easier for Helen than the last. Her grunts soften, and her lats flare even wider – giving her an unreal V-taper.
After the tenth deadlift, she casually puts the tree back down on the ground, as if it were nothing to her.
Helen strides over towards you. “Whaddya say? Am I goddess status yet?”
You stroke your chin a couple of times before replying, “Nah. More like a low-level super.”
“LOW-LEVEL?!” Helen yells and places her hands on her hips in a no-nonsense pose. If she wasn’t your girlfriend, you’d fear for your life.
“I mean… yeah. Even Ultraman would instantly obliterate you in a fight. You’ve got a long way to go.”
“Hmmph!” Helen takes a few strides towards you, intentionally slamming her feet on the ground, causing it to quake slightly. “How can you call yourself a comic fan without remembering that Ultraman would lose his powers under a pink sun like this?”
“That is… a surprisingly great point. But still, how do we know that this sun has the same properties as the one in Ultraman’s world? For all we know it could end up empowering him even further,” you retort.
Helen squints a bit, “But, by your own logic, how do we know that he would be empowered by our sun at all in the first place?”
You ponder the thought experiment, trying to come up with an appropriate response, but fall short. “Touche,” you concede.
2.5)
Helen stands right in front of you. You’re still taller, but her posture is far better than yours. You estimate she’s a proud 5’7” to your slouching 5’10”. Her skin is pristine and vibrant, like an idealized fictional character rather than a living person. Helen’s hair, which was already bright blonde, is now closer to the sun’s radiance in color. In fact, staring directly at it for an extended period of time hurts your eyes.
“You know…” Helen starts, visibly concentrating, “If I try really hard… I can zoom my vision in. A lot.”
“Oh yeah…?” you reply, somewhat anxiously.
“Yeah.” Helen confirms, “I guess I can’t see at a molecular level or whatever, but maybe the uh… cellular? I dunno, I was never too good at that biology stuff.”
At least she isn’t randomly turning into a genius. “Well, what do you see?” you ask.
“I think your body and muscles are pretty normal. But…” She turns her attention to her own before smirking, “Mine are… How to explain this… Well, it looks like I have some kind of energy emanating off of my cells, like they’re super-charged,” she says.
“Makes sense.”
“So babyface, tell me…” She lifts her right arm and slowly tenses it, a massive ball of power rises, underneath it thick tendons fill the deep gap between her upper and lower arm. “How big is this thing?”
“I… I dunno Helen. Maybe like 22 inches?”
“That’s all?” she asks with another huff. “Here, put your hand on my muscle.”
You obey. With your fingers on it, Helen extends her arm out again, and gathers sunlight again. You can feel firsthand as the sunrays somehow moves through your fingers and directly enters Helen’s biceps. Not an atom of it empowers you.
You feel the muscle harden even further before it grows again, physically pushing your fingers apart a little in the process.
“Well, now what are they!?” she asks.
“I really don’t know Helen, I don’t have a measuring tape. But I’m guessing they grew another half-inch.”
“I hate being so weak!”
“Weak!?”
Helen giggles before lightly grabbing your crotch. Despite the stimulation, it remains only at half-mast.
“I guess three times in such rapid succession during the tree incident was a bit much,” Helen says. “So, you probably need a little more… motivation.”
Helen floats up into the air until her crotch is directly level with your face. Helen nudges herself forward and says, “You know what to do.”
You’ve serviced Helen before in the past, but her body has changed so drastically it’s like a new experience. Your face rests a few inches away from her thighs, each of which are thicker than your waist. The heat radiating from them reminds you of the unfathomable potential energy Helen controls.
And the taste… the sweet flavor of her ‘honey’ is even more intense at its source. You lick vigorously – not just to please her, but for your own desires to immerse yourself in the flavor.
“Mmm…” Helen coos, “My hands can technically do a better job, but there’s something about that external stimulation…” she groans.
You disregard the backhanded nature of the compliment and continue your task, increasing the rate you consume and the speed with which you do so. Her moans intensify, which spurs you on, creating a positive feedback loop. You feel Helen’s pelvic muscles contract (her control over which is becoming mythic) and push against them your tongue. This increases her pleasure, and yours as well. Soon comes a gush of wondrous discharge from her sex.
“Drink deeply,” she orders with a final moan.
You comply.
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