Timmy yelped as his BIG brother roared once again. The small, blonde child recoiled in disgust as he watched a river of clear, opalescent fluid leak out of Jamie's penis. He couldn't believe his own brother was peeing on himself. Timmy shoved the door close, the rumbling inside shaking the house's foundation.
Timmy runs down the stairs, all the while his brother was swearing up a storm. The kid sits in the living room, holding himself, almost sick to his stomach. The sounds coming from his brother were almost inhuman. They continued for a good couple of minutes, the beast stamping about as he unleashed in his room. After a couple more minutes, low, lewd moans emanate from Jamie's lips before the house goes eerily silent, Timmy almost holding his breath.
He was about to make his way back up, his youthful curiosity getting the better of him, however, there's a knock at the door. He was about to ignore it, but the person was persistent. "Yo, Jamie, where are you, bud?" a deep voice calls from the other side. The knocking becomes thunderous. "YO! IT'S ME, CHARLIE!"
Timmy knew better than to open doors for strangers. But he did know that Jamie's best friend, Charles, used to always swing by. But the man on the other side of the door didn't sound like Charles. He sneakily makes his way to the door and gets onto his tiptoes to peer out the peephole.
Standing there was a strong, muscular teenager. He looked the same age as Jamie and Charles, he even had the same colour of hair and eyes. But where as Charles was soft and almost formless, this Charlie guy was sharp, angular and masculine, and if he was lucky he was half as good looking to Timmy as his big brother was.
"Charles?" Timmy asked meekly through the door.
"Fffu- Timmy, that you, kiddo?" Charlie asked.
"Yeah," the kid called back.
"Can you let me in, little guy? I'm here to give your big bro some hand-me-downs."
"O-okay," Timmy replied, slowly opening the door.
"Geez, kiddo, long time no see, remember me?" the big jock chuckles, a warm smile on his face. Timmy noted that he had a strong scent of cologne on... but that still couldn't mask that pungent smell... the same one Jamie was making in his room. "Gosh, it looks like you've seen a ghost, kid."
"It's Jamie," Timmy replied. "He... got really big and started touching his... you know, wiener. And now he's peeing all over himself."
"Oh... uh," Charlie coughed, the jock having the decency to blush. "Sick fuck, right in front of a kid." The big brute gets on one knee to level with the kid. "Timmy, that... that's not pee. Y'see... when you're older and you get real... uh, 'happy' sometimes your wiener will make that stuff."
"So it's not pee?" Timmy asked, inquisitive as ever.
"No, most people call... ugh, can't believe I'm telling a kid this. Most guys call it 'cum' and we make it when we really want to get... uh... close with someone."
"Like, wanting a hug?" Timmy asked, a little more jovially. Duh, Jamie just wanted company that was all.
"Heh, not really, maybe a little more than that. You'll understand when you're older, kiddo," Charlie replied with a wink.
The jock began to make his way up the stairs, Timmy following suit a couple paces back. The teenager knocked on Jamie's door.
"Yo, Jamie, heard you jerked off in front of your kid brother, what kind of sick-" However, as Charlie opened the door, he stopped dead in his tracks.
A wave of heat washed over him, Jamie's epic body pouring out heat like a sauna, rivulets of sweat mixing with the sperm coating his hairy, almost furry pecs. The smell of sex and briny sweat assaulted Charlie's nose, the musk taking over him. His eyes drank in the sheer size his former nerd-friend had grown to. The beast lying on Jamie's bed was a freak of nature, 6' 9" and packed to the brim with rock hard mass. Jutting from Jamie's crotch was the world's largest cock, still hard, the 17" monster oozed the last remnants of Jamie's seed, the payload coating his entire body and most of his room.
"Fuck- Charlie?!" Jamie blurted. "Charles," he tried to correct. His hands stopped grazing at his monumental length and he tried to pull the covers over his massive man-meat to no avail.
But if he was expecting a reply from his friend, he would be disappointed. Charlie blushed furiously, the jock straining to keep the growing pressure in his loins under control. He couldn't let Jamie see what his massive, brutally thick body was doing to him. He ran out of the doorframe, down the stairs and right out the door.
Realization hit Jamie slowly, first a pang and then full-on heartbreak. His erection, throbbing and full, thick as a wine-bottle, began to flag. His afterglow cut short, the giant sighed and rolled over, sitting up on the edge facing away from the door and Timmy.
"Can you leave me alone, Timmy?" the beast of a teen asked, his voice gentle like Timmy knew him to be.
"Okay, Jamie," Timmy replied, slowly stepping out of the room and closing the door. He thought he could hear Jamie begin to cry a little from inside.
***
Timmy had gone back downstairs and waited... and waited and waited. By the time evening rolled around, Jamie still hadn't come out of his room. Peeved that Jamie hadn't fixed him lunch or dinner, the kid had resorted to making a peanut butter and jelly sandwich for himself. When it became obvious that Jamie wasn't going to read him a story goodnight, the kid stormed back up the stairs.
"Stupid, Jamie. Getting mad that Charles didn't want to hang out. He should know better than to 'cum' all over the place. It's gross! Besides, I would have kept him from being lonely," Timmy harrumped.
He pulls the door open to see the lights all off inside Jamie's room. The teen-beast was slumbering gentle, his epic chest rising and falling slowly. But most notable of all, was the massive 17" boner jutting out of Jamie's crotch from a bush of dense pubic hair.
Timmy sighed, Charlie had said guys do that when they wanted to get 'close to someone.' Well, if that was the case. "You owe me one, Jamie," he grunted. He climbed on top of the bed and slowly placed a hand on top of Jamie's engorged shaft. The beast stirred slightly, a light smile crossing his handsome face. Timmy smiled back, knowing that his brother enjoyed that. He slowly began to work at Jamie's shaft, making sure to keep his head far away from the stream of liquid coming out of Jamie's cockhead. "Gross, eww," Timmy whimpered. But if it made Jamie happy... he'd do it. "C'mon you stupid wiener, make that stuff already." He began to tug at the foreskin just underneath Jamie's head. The big beastly brother lets loose a low moan, but thankfully didn't stir from his sleep.
Just then... Timmy yelped as he felt something change. Jamie began to groan... or more accurately... his body did. Little did Timmy know, he was about to witness the daily growth spurt the pill caused in Jamie's body first hand. First, Jamie's body began to grow hot, almost dangerously so. The milky skin on the giant grew pink, head radiating out of him, sweat slicking his body, giving it an almost ethereal sheen in the moonlight filtering into his room. Jamie's muscles began to expand, his physique bloating further into freakdom. There was no way for him to ever pass as normal, his muscles had grown too full, his pecs pushing his nips down, his arms forced out slightly at an angle, his traps began to swallow his neck. Forever more, Jamie would have a pronounced bodybuilder's swagger, his epic cock and balls dangling pendulously between his bloated legs. Speaking of which, his cock began to push out even further, inching longer and thick, pushing Timmy's fingers out of the way, the kid now no longer able to even get both hands around to circle around his girthy circumference.
As the growth tapered off, the now 7' tall behemoth, built like a brick warehouse with a freakishly thick 19" cock and balls that put cantaloupes to shame, began to buck his even stronger hips, the need to cum overtaking him.
Timmy let out a little cry as his hands slipped on Jamie's slick shaft, his face on a collision course with Jamie's cockhead... As his lips part around Jamie's dick, the sensation was enough the send the teen-beast over the edge. A blast of semen roiled forth, out of his cock and right down Timmy's gullet. The blond kid sputtered and pulled back immediately. He reeled away as his brother continued to cum, semen flying all around the room as the newly-grown shaft bobbed and swayed with abandon.
Timmy ran out of the room and into the bathroom, incredulous of what had just happened. The 'cum' in his mouth, it didn't taste bad, a little salty, but it wasn't too intolerable. What was worse was the goopiness! It clung to his lips, his face and his hair. He turned the sink on to rinse as much of it out as he could. He vowed right there and then, no matter how much Jamie needed 'company' he'd never do that again!
However, as Timmy got the last of it out, and as he made his way back to his room, he could feel a warm feeling spread out from his stomach. Unbeknownst to him and even Jamie, was that during Jamie's daily growth spurts, his testes produced a special cocktail of hormones to fuel the change, a burst of androgens permanently changing his body... A cocktail of hormones that was now making its way into Timmy's body.
As Timmy laid down on his own bed, he began to feel weird. He felt an immense pressure in his elbow and knees. He whimpered as the limbs began to lengthen, his body rudely and forcefully flung into the throngs of puberty. Timmy's cries begin to deepen, his Adam's apple beginning to push its way out. The rapidly growing kid's body grows a light dusting of blond hair as his muscles begin to push out of his frame. His physique goes from a child's to a waifs, to average, then to a jock before finally resting somewhere between a highschool wrestler's and a teen bodybuilder's. Timmy moaned lewdly as his arms destroyed his pyjama sleeves, his now tree-trunk thighs doing the same. In mere moments, Timmy had gone from a small kid to a 6'2", 240 pound musclehead. He could feel stubbly hair pushing through his jawline, his visage becoming ever just as rugged as his older brother's, and just like his brother, if anyone had to guess, they'd say he looked in his 20's, a far cry from the vulnerable child that he was.
The newly-minted stud grunted lowly as he felt a new need... His hands roamed down to rest on his small, 2" cock. It could use a little 'company.' He began to stroke it, feeling the thickness flowing right into his shaft. The blond stud bucks his hips as new sensations enter his faculties, his back arcing wildly as he picks up the pace. His balls grow to the size of lemons, churning with his own beastly cum. "Frick!" he wailed, unable to bring himself to curse like Jamie does. His cock shot up to 4" before he really began to tug at it. His eyes rolled back as he continued to pleasure himself for the first time and 4" became 6". With more room, Timmy smiled as he began to really work his shaft, his hand making an audible slap against his pelvis with each jerk. When it got to 8", his other hand joined in the self-worship. He touched his muscles, felt how hairy he had become, felt how powerful he had become. New feelings entered his head, dominance, submission... all the new dirty things he wanted to do with his big brother. Heh, all the the things we wanted to do TO his big brother! His new jock-cock sputtered, the pre that had been leaking out suddenly stopping as all 10" of his shaft throbbed painfully. He felt a static in his head, the tips of fingers going numb as he experienced orgasm for the first time. And it was glorious. Cum jettisoned out of his giant shaft, splattering arcane patterns into his comically small sheets. Five huge spurts later and he was reduced to a dribble, his big dick slowly going limp as he drifted off to a peaceful slumber, his arms and legs dangling off his kid-sized bed.
***
Morning rolled in, and it hit Jamie like a freight train. The 7' behemoth shot up from bed and looked at himself. Even from his heavy breathing, he could tell... he had grown again. He stood up and made his way to the now tiny mirror in the corner of his room. Gods... he'd gotten even hairier from last time. His shaft slowly began to inflate with blood as he took in his improved musculature, the slow realization that he could never be too big, never be too muscular was settling in. If only... if only Charlie was into it as much as he was. That was enough to keep his shaft from reaching its full 19".
However, that was about to change. As he made his way to the bathroom, he could hear deep gruntings coming from within. He peered inside and his rod shot straight up to full hardness... and then some. Standing in the bathroom with his back to him, was the hunk of his dreams. Dark blond hair cascaded down to just above the muscleman's shoulders. His back muscles were wide and corded, rolling with every small movement. Best of all was the hunk's muscular bubblebutt. It didn't take long for Jamie to imagine plunging his enormous cock into that perfect ass. The hunk's arms writhed, his thick triceps moving in a lewd display as the stud pleasured himself, stopping to flex his biceps in the mirror. That's when he noticed he had an admirer.
"Jamie?" the stud said, turning around to face an ever growing monster. The stud's blue eyes light up as he drinks in... drinks in the sight of his big brother.
"Jesus... Timmy?!" Jamie blurted out. He knew it was wrong... but as the news settled in... he could only feel himself get even harder...