Mother Knows Best Rebirth 9 – Female Muscle Growth Story Preview

You can buy this story here: Mother Knows Best Rebirth 9

Mother Knows Best Rebirth Chapter 9
By MagnusMagneto
Version 1.0
Approximately 9,650 words
Special thanks to Ritualist and Detritus

[New to the series? No problem! Get caught up here: http://fav.me/dab8c39 ] [Notes: Kiko is a hormonal young woman with a lot on her mind, but she is 18 years of age – legal adult.] [Small sexual content warning.]

1.) Earlier that day – during Chapter 8

At 4:45 AM, Kiko awoke. She glanced down at her nude body – despite the low light in the room, she could still make out its details. Her abs seemed to jut out a bit more; her pecs were a bit larger and further striated; and even while laying down, her quadriceps bulged out a bit more than she last recalled. Kiko brought her arm in front of her face and flexed it, the proportionately large ball of muscle rippling to life. Good, gained more size. And definition. Progressing just as fast as I thought I would if I actually tried. She thought to herself.

A mere few days ago the sight of larger muscles would have bothered Kiko profusely, but now she had a new goal, a net outlook on life; and truthfully, it came a lot more naturally to her than her prior one.

Eager to continue progressing, Kiko started the morning with a rigorous abdominal exercise in her bed: leg raises, reverse crunches, flutter kicks, and scissors – all performed with perfect technique and optimal mind-muscle connection. She even slid out of bed and quickly entered an advance plank position. “Too easy…” she murmured with disappointment as her planking time surpassed what 90% of men could hope to accomplish.

Kiko performed more bodyweight exercises, did some advanced (basic for her) martial arts Katas, and took a soapy shower.

Despite her misgivings about Cory’s change of heart, and her frustration stemming from Tara’s superiority, Kiko had to admit that she felt like she was on top of the world. Her body was flooded with endorphins – far more than usual – biologically reinforcing her decision to start seriously providing her muscles with the stimulation and nutrition they craved. As her fingers ran across the soaked limbs, there was no doubt in her mind: she had grown overnight – especially in this pumped state.

Kiko smirked as she considered what Cory’s reaction would be. She imagined the silly dweeb making some dumb comment about how, ‘Oh my God, did you get bigger overnight?’

After showering, she dried off, and still nude, she examined herself in the mirror. Kiko noticed that her brows were a bit bushier than she would have liked. She had never really paid much attention to them before, but now that she saw it, she couldn’t help but be bothered by them.

“Maybe I should…”

A few moments later…

What the hell am I doing? Kiko thought to herself as another hair was painfully removed. Whatever, may as well finish the job. She reasoned as she continued shaping her brows, powerful muscles in her forearms flickering in response.

After a short while, she finished and observed her handiwork. “Kind of sucked, but I gotta admit they look better.” She murmured to herself.

Kiko then began to scrutinize more of her body. She noticed a scant amount of stubble at the locations her bodily hair grew. Ugh! What if someone notices this!? She thought to herself as she grabbed the appropriate supplies and prepared to shave. As she lathered the skin, Kiko considered how in the past she likely would have waited another day, possibly a couple more if she could get away with wearing covering clothing. Didn’t matter, she was already in the process and might as well finish.

Clearing her underarms was particularly tricky, due to the pocket of power created by her bulging lats and pecs. Despite this, Kiko persisted. She next turned her attention to her legs; in truth, nobody would have noticed anything from a distance, but she was on a mission. Once again, the powerful ridges of muscle on her limbs made reaching every inch of surface area an intricate ordeal. Through sheer focus and dedication, Kiko persevered.

Kiko rubbed her smooth legs a few times, “They feel good… but what if…” she picked up a bottle of expensive moisturizer that was regularly stocked in the guest-bathroom. She squirted some into her palms and began to rub it on her legs. As she absentmindedly applied the lotion, Kiko’s mind drifted, and she thought about what a pain this was to do. Wouldn’t mind letting that dweeb take care of this. She thought, snickering at the concept of Cory awkwardly trying to lather it into her skin without coming off as too creepy or something.

Kiko felt her skin practically drink the moisturizer in, instantly becoming noticeably softer and a bit shinier in the process. It had done this every time she bothered to do so in the past few years; though she could have sworn that at a younger age this wasn’t the case. Despite her confusion, Kiko didn’t care to dwell on the mechanisms of skin moisturizer. Instead she was searching for her next beautification target.

“What about these nails? I mean, already did all that other crap…” Kiko murmured to herself, staring at them.

Kiko decided to paint them, and fortunately the guest-bathroom also had a moderate selection of nail polish to use. She settled on black, and as she painted her nails, she felt a tinge of embarrassment that they were fairly jagged. She thought about Estella and Tara, with their perfectly shaped nails – long, strong, and lustrous. I’ll show them. Somehow… Kiko thought to herself. After painting her fingernails, she decided to do the same with her toenails for consistency’s sake.

Finally, Kiko glanced over at the makeup kit in the bathroom’s drawers. Can’t even remember the last time I tried that crap… She thought to herself, picking up a container of mascara. Well, maybe if I just use a tiny bit I’d look better? She reasoned before applying some. Her application wasn’t exactly perfect, but it was good enough. She also experimented with some foundation and light lipstick.

At last Kiko felt content with her grooming efforts for the day. She slipped on a revealing training outfit, nodding with minor satisfaction at how it had become more snug. Then her mind wandered to something that surprised her: would Cory like the way it looked on her? Would he appreciate how her pert breasts were elevated slightly higher by her expanded pecs? Would he try to sneak peaks at her rear which now consumed more of her athletic shorts?

Why do I even care about that!? Kiko thought, shaking her head and lightly slapping herself. It was strange: she really didn’t find herself particularly attracted to Cory himself, but was becoming increasingly attracted to the idea of him liking her. This made Kiko feel slightly guilty, but as long as she didn’t do anything terrible to him, everything would be okay, right?

Kiko wondered where her mother and Tara were. The house was conspicuously quiet. She could have sworn that she heard them in the living room earlier – did they go out for a run together? She hadn’t heard the door opening; but while her senses were sharp—possibly even superhuman–they weren’t as good as UltraMan’s. Kiko decided it didn’t matter either way, and proceeded to the basement. She pressed against the home gym’s door, only to find it completely stuck. “Da fuck…” she muttered, pressing even harder, going so far as to even slam against it.

Then she felt something – a vague vibration. She held her ear against the wall, and immediately understood – there were people inside, and the walls were covered with those noise-cancelers that Estella always used to “entertain” certain business contacts. Kiko let out a loud sigh and trudged back upstairs.

She walked over to Cory’s door, and felt… hopeful? that he was awake this early. After lingering outside for a few moments, she deduced that he was still asleep. A smile formed on her face as she considered bursting in and waking up, but she remembered that his dorky body probably needed more time to recover from their workout yesterday.

Feeling slightly defeated, and not wanting another confrontation with Tara, Kiko skulked back to her room and meditated.

2.) Later

Kiko heard Estella and Tara scurry into the master bedroom. She released her intense mental focused and sauntered out. A brief stop at Cory’s doorstep revealed that he was still asleep. She considered just going down to the gym by herself, but for some reason she really wanted Cory to join her. Plus, he could whip up a meal as well. Kiko knocked on his bedroom’s door. No response. She knocked harder, forgot her own strength, and caused the entire frame to shake in the process.

“Jus’ a minute.” Cory’s groggy voice came from the other side.

Kiko heard him scramble a bit before his voice said: “What’s going on? What’s up?”

“It’s me. Kiko.” She replied.

“Kiko? Okay, um…”

Kiko continued, “It’s already 5:30 AM! Come on sleepy head, let’s get the day started!”

“Oh… alright… I’ll be out in a bit.” Cory was already awake, so there was little point in fighting it now.

Kiko anxiously waited in the living room, performing various types of push ups in the meantime. Her chest and triceps slowly pumped up to larger and larger states as blood rushed to them. Between her grooming, light makeup, and pumpedness, Kiko aimed to give Cory quite a shock.

At last Cory came out, finding Kiko performing press-holds, the weight of her entire body elevated by her proportionately brawny arms.

“Good morning.” He greeted, dressed in a t-shirt and long shorts. “Did you eat yet?”

“No.” Kiko replied.

“Alright. Any requests?”

“Lots of protein.”

Cory nodded and got to work.

Cory prepared a small feast. While he didn’t need to eat that much, he was unsure about the depths of Kiko’s appetite. And if there were any leftovers, Tara and Estella would surely devour them at some point. “Food’s ready!” Cory announced.

Kiko stopped performing squats and came over. Small beads of sweat had begun to form on her body, causing her sleek muscles to shine. Cory tried not to stare, but found himself still eying over her taut limbs; he had to admit that with each passing day, he was attracted to them even more.

After sitting down and briefly thanking him, Kiko started to dig in. Cory joined her, and noted how much faster she ate than he did. Knowing that his food was directly fueling her body, helping her grow even more, brought Cory a swell of pride.

“Notice anything about me?” Kiko asked.

“What do you mean?”

“Like my appearance. Is there anything different?”

“Hmm…” Cory thought about the question for a few moments. “Well, your muscles are pumped up.”

Kiko nodded. “You like that?”

“You look good, of course.” Cory affirmed.

Kiko squinted her eyes a bit, “Anything else?”

“Umm…” Cory was at a loss. He considered trying to figure something out to appease her, but decided to tell the truth: “Not that I can tell.”

Kiko let out a loud groan. Cory didn’t even notice her beautification efforts! With a huff, she began digging into the meal.

The rest of the meal passed awkwardly. Cory’s attempts to stir up conversation were mostly shot down by Kiko. What he didn’t know was that she was being intentionally moody. He must not actually care about me if he didn’t notice these nails! Or even the mascara!? She thought to herself, shoving another forkful of fried eggs into her mouth.

Cory had thoughts of his own: What’s going on? Why is she suddenly so… difficult? Woke me up just to snub me? Or maybe she just wanted me to cook her breakfast. I mean, seriously, she’s like 18? And she can’t make eggs for herself? Surely she could have just eaten some protein bars or something…

At last they finished.

Cory tried once again to initiate conversation: “Wow, you ate three times as much as I did!”

Kiko’s eyes widened and the look she gave him made him legitimately afraid.

“I meant that as a good thing…” he quickly added. “Like, you know… since you’re trying to gain muscle, you’re able to eat a lot. And since you eat a lot more than me, it should be that much easier for you to build muscle…”

“Right.” Kiko finally spoke again. “Well. Thanks. For cooking that is.”

“Sure, no problem.”

“I’ll put the dishes away.” She offered, picking the plates up and bringing them over to the sink.

“Oh, thanks!” Cory added as she rinsed them and placed them into the dishwasher. It then occurred to Cory that ever since he started cooking for his mother, she hadn’t done that once. As much as he came to respect Tara, he couldn’t help but feel a little miffed by that.

Well, at least she isn’t that mad at me, or whatever, since she’s at least helping out like this. Cory decided.

Kiko considered snubbing him and working out alone, but her underlying desire for him to join her overruled her momentary pettiness. In fact, what Kiko really wanted to do was tease Cory a bit. Without saying a word, she lifted his t-shirt, revealing a small protrusion erupting from his otherwise flat belly. She looked down at her own abs, which had a small growth of its own, but was comparatively smaller than Cory’s.

“Looks like I ate three times as much as you, AND my abs are still flatter.” She said with a smirk.

Cory was flabbergasted by the statement but found it oddly… arousing.

Kiko sensed this, and tickled his belly slightly. “It’s ‘kay though. Still cute.”

Cute? That was the first compliment she’s paid me. I think. Cory thought to himself, blushing slightly.

“But me…” Kiko formed a fist and slammed her bulging upper-abs, “I’m beast-mode.” She declared with a slightly smug look.

“No denying that.” Cory affirmed.

“Wanna help me get even beastlier?” Kiko asked.

“Huh?”

“Work out, dummy. As in, want to go lift weights with me?” She sighed.

“I dunno if I should, I tend to get cramped if I work out after eating a lot.”

Kiko shrugged. “Then guide me. And watch. You want to look at my muscles as they dance around and pump up even more, right?”

Cory cleared his throat, “I suppose I can spot you, sure.”

“Good. Let’s do it.”

3.)

Kiko and Cory entered the gym, finding it in complete disarray from Tara and Estella’s workout (see Chapter 8). They both let out groans of agony.

Cory was upset that things were so messy – that he’d almost certainly have to clean them up at some point.

Kiko on the other hand was distraught by the sheer amount of weight that was left on each barbell. She walked over to the bench press and performed some mental math. “Nine… HUNDRED pounds?” she whined. “There’s no way this was actually used for benching, is there?” She wondered out loud, slipping onto the bench underneath the weight. Kiko placed her hands on the bar, gripping it as if she were going to lift it. On a lark, she pushed with all of her might, the taut muscles in her chest bulging in the process. Her effort was entirely unrewarded; the bar refused to move whatsoever. She imagined what it would be like to have enough strength to lift it: a shudder ran down her spine; Kiko was already lethal enough to be classified as a deadly weapon – but with power like that she’d be neigh unstoppable.

“God dammit!” Kiko shouted. “This has to be a prank!”

“Eh… You’ve seen my mother’s chest Kiko. Really wouldn’t doubt it if those pecs can move 900 pounds.” Cory said.

Kiko leapt off of the bench and stamped her foot on the ground, causing a loud thud.

“Oh man…” Cory was looking at the body-scanner and its latest readings. “Umm… Yeah, she definitely did lift that.” He said.

“What are you on about?” Kiko walked over and looked at the numbers on the screen.

-Basic Check Up Results-
Height: 6’6.7”
Weight: 401 lbs
Bodyfat Percent: ERROR

She didn’t even bother glancing at the specifics for Tara’s measurements. “How is this even possible!?” Kiko exclaimed. “How can Tara be this… this everything!?”

Without another word, Kiko walked over to the dumbbell rack, picked up a pair of 40s and started straight curling them, her thick arms selling up considerably.

Cory chuckled. “I warned you to not worry about it. What if I take a spin in the machine and let it record my stats too, would that make you feel better?”

Kiko remained silent, letting out soft grunts with each repetition, intently staring at her reflection in the mirror, visualizing her arms with even more muscle and power. She was going to catch up to Tara. Somehow. And she wouldn’t even feel bad about it if she did! Tara was practically taunting her at dinner last night! Tara wanted her to grow… for some reason. And Kiko was going to oblige her aunt.

Despite Kiko’s lack of response, Cory had the machine scan his body anyways. It read:

-Basic Check Up Results-
Height: 5’11.5”
Weight: 178 lbs
Bodyfat Percent: 18%

He then ran the advanced diagnostics to get a full reading on his measurements, which had been modified due to his gender.

Biceps: 15 inches
Calves: 14 inches
Quads: 24 inches
Chest: 36 inches
Waist: 31 inches

“Now come over and laugh at how much smaller I am than my mother!” Cory offered with a good-natured grin.

“Yeah, I can see it.” Kiko replied, still curling the weight.

“You can? What does it say?” Cory challenged, skeptical of the claim. “You’re all the way over there.”

“And? I can see it.”

“No way.”

“Says you have 18 percent body fat, 31-inch waist, etcetera.” Kiko slammed the weights down and deeply panted during her resting period.

“Well maybe you should come over and get scanned too. Compare your numbers to mine.” Cory offered.

“Fine. One minute.” Kiko grabbed the dumbbells again and diligently lifted them. Even when clearly enraged she employed mechanical precision with her motions.

A few minutes later, the machine revealed Kiko’s measurements.

-Basic Check Up Results-
Height: 5’6.5”
Weight: 179 lbs
Bodyfat Percent: 11%

Biceps: 16 inches
Calves: 18 inches
Quads: 27 inches
Bust: 39 inches
Waist: 28 inches

“Daaaamn Kiko, you’ve got me smoked already!” Cory cheered cheesily.

“No kidding dude. I only did the scan to humor you.” She replied curtly. “Now are you going to stop fulfilling your measurements fetish and gawk at my muscles or not?”

Cory shrugged and made his way over to Kiko. She proceeded to her third set of bicep curls with the dumbbells.

“Ah… normally you should start with the larger lifts, I think.” Cory said, “Apparently it’s best to work the compound groups of muscles, then hone in on the smaller ones after…”

Kiko merely grunted as she lifted the weight once more, her bicep swelling once more. On her comparatively short frame, the 16-inch gun looked massive, and her olive skin accentuated its definition.

Back to awkward silence. Cory felt a little anxious – Kiko was still acting strange, and there were all these protein bar wrappers all over the floor… No doubt Tara and possibly Estella ate those. But why did they just leave them lying around?

Cory turned his attention back to Kiko, who was perspiring slightly. “Oh hey, your finger nails are black.” he finally observed.

Kiko’s ears perked up. In truth, she was elated, but she still wanted to play it cool, “Took you long enough to notice.”

“Are… you mad at me for not seeing them at breakfast?” Cory asked, suppressing a laugh.

Kiko remained silent.

After finishing the set, she slammed the dumbbells down on the rack.

“Thanks for putting them away. The weights that is.” Cory said, painfully aware of the scattered weight plates and 100+ pound dumbbells all over the room.

“Do they look good?” Kiko asked as she walked over to the dead lift station.

“Do what look good?” Cory asked, following her.

“Frig’s sake! How much weight does Tara have on this thing!?” Kiko cried out loud.

“A lot.” Cory said, unclasping and removing a weight plate, struggling to move it. “Also do what look good!?”

“My nails.” Kiko replied, removing a weight plate from the opposite side with significantly more ease than Cory.

“Oh. Yeah!” Cory replied.

“How can I make them look better?” Kiko asked, already removing a second weight plate as Cory still worked on his first.

“Ummm… I dunno.”

“Bullcrap. There must be something I can do to make them better.”

“Let them grow out a bit I guess?” Cory offered.

Kiko didn’t respond, but she took the advice to heart.

[This is just the first ~35% of the story! Get the full thing by supporting it on Gumroad!]

You can buy this story here: Mother Knows Best Rebirth 9