It was a scorching hot summer day.
14-year-old Josh was busy shooting hoops in his backyard as sweat started to drip off his body. Exhausted, Josh decides it was time for a rest as he made himself towards his home. On his way there, he happened to come across his little sister, and her two friends, the three of them of course were heading towards the kiddy pool out back under the tree.
"Watch where you're going squirt" He said to his 7-year-old sister.
"You watch where you going!" His sister, Ashley teased back. Her friends Jennifer, and Brittney just walk onwards not minding too much of their little dispute.
Jennifer was a brunette with long hair, brown eyes, and round cute face, her skin was also quite fair but a little tan. Brittney on the other hand was a perky light blond, who's hair slightly curled out, her eyes were a bright blue, and her skin was more pale than her two friends.
Josh finally making his way into his house, ran into his mother unpacking grocery she just bought.
"Hey Josh, I need to head out really soon again, so be sure to watch over your little sister and her friends, okay? I'll be back later today."
Josh groaned, but continue to make his way to the bathroom in order to take a shower.
"Here take this" his mother said, tossing her son a blue shampoo bottle that was clearly design for kids. Josh was taken aback a little by this brand, but his mother retorted that it was all they had for the moment.
Josh starting the shower, and rinsing the sweat off his body, latter up his hand with the shampoo as he began to scrub. A pleasant feeling washed over his body at that moment, as Josh felt a warm glow extend to every point in his body. Just then after a minute he felt his body push out, becoming larger, stronger and taller. Josh started to get a little aroused from this sensation, as his dick slowly begins to stiffen. Again another minute passed as Josh grew again, causing his hard dick to throb as it stretched in length, and increase in girth. "Oh my god," he groan, his voice maturing "this shampoo making me grow".
Again a minute passed, and again another as Josh body continue to grow out and bulk up, his throbbing dick now large and fat. Rinsing his hair now, and stopping the shower, Josh paused for a moment to catch his breath as he looked down at his 18-year-old body.
"I need a woman so bad" He moaned looking down at his throbbing cock, but the only girls right now that was even near Josh were just 2nd-graders that couldn't even satisfied his lust, needs, and desire. But then looking at the shampoo, Josh begin to smile, for he knew that he could change that.
Outside Ashley and her friends were enjoying the nice refreshing coolness of the kiddy pool, when they saw Josh making his way out back, carrying a shampoo bottle for kids.
"Hey Ashley, isn't that your brother Josh?" one of her friends ask. "Doesn't he look a little bigger now?"
Ashley didn't quite understand what her friend meant, but as Josh approached closer, he did indeed look bigger, and older. Josh reached them finally as he towered over them, they look up at him with their wide eyes.
"Josh? Did you get bigger" His little sister asked with a quivering voice.
"Yup, and I'm here to show you how I did it, but I'm going to need a volunteer." Upon asking this the girls look at and forth between each other. "How about you Jennifer?" He finally asked.
Jennifer was a little reluctantly, but slowly made her way out of the kiddy pool, standing in front of Josh. The height different was enormous as little Jennifer stood barely at his waist. Because of this she couldn't help but be a little intimidated.
Josh just smiled down at the frighten little girl. "You don't have to be so scared" he said in a calm voice, "all I'm going to do is wash your hair with this shampoo okay?" Jennifer just nods as Josh spun her around, wetting her hair with a hose nearby, and latter his hand with the shampoo, begins to scrub her hair. Jennifer began to relax as she felt a pleasurable feeling race across her body, Josh of course was waiting with anticipation on the growth that was bound to follow.
The girls back in kiddy pool didn't really understand what all of this had to do with Josh becoming bigger, but just as a minute passed, they saw with their own eyes as Jennifer seemed to have expanded taller just at that moment. The girls gasp as Brittney said with excitement, "did Jenny just grow!" While it did look like that, they all watched for another minute, Jennifer thus expanded out once more in front of them.
The girls eyes began to widen as Jennifer slowly but surely began to outgrow them. As the minutes passed they watched her height rise taller, and her body fill out, stretching the once fitting 2-piece swimsuit across her body.
Josh watched as with every spurt her height slowly rose higher up his body, making it easier to continue scrubbing her hair. Several minutes has already passed as Jennifer let out another moan as she grew once more. This time her breast began to push out, forming pointy mounds for her budding nipples.
"I'm getting boobies" she gasp. Josh hearing this couldn't help but feel slightly aroused as she was now becoming more like a woman, and thus sped up her scrubbing due to excitement. Minutes continue to pass as the two little girls couldn't believe that their friend had became a teenager in such a short amount of time. Jennifer body was now taking a womanly shape as she continue to grow.
Hitting another growth spurt, Josh couldn't help but watch Jennifer 15-year-old hips expand even more, pushing her ass outwards. Josh was now getting hornier by the moment as her body became more and more developed, his cock now was increasingly throbbing. Just then another minute passed, as Jennifer moan as her 16-year-old body bulged out, her boobs were becoming quite large and round, and her ass expanded again causing her to pout it towards Josh. But because of that Jennifer's buxom ass brushed up a against Josh's throbbing cock, making her jerk away quickly, but then she sank her ass out again, finding his stiff cock, and shifting it in place between her cheeks as she slowly began to grind it.
Josh couldn't help but let out a small grunt of pleasure, as Jennifer turned her head looking at Josh, then down at his cock, and smiled as she continued to stroke his cock with her ass cheeks. But from the front, Ashley and Brittney had no idea that this lewd act was happening right before their eyes.
Jennifer continue to fill out her womanly assist during the next 2 minutes, pushing her ass out against Josh, and letting out a sensual moan every minute that she grew. Jennifer had already almost caught up to Josh's height as she now stood slightly below him. Josh considering that it was time to stop, rinsed the shampoo off the now 18-year-old beauty.
Jennifer smiled as she finished her growth, and twisted her body to order to meet Josh. Her face was stunning, and her breast magnificent, Jennifer then brushed one of her long shapely legs against Josh as she pressed her body closer to him, wrapping her arms slightly around him.
Josh was breathless as he look upon her, placing his hand down her slim waist, resting them on her flaring hips. "You're so sexy" he softly moaned. Jennifer smiled in response, flashing her perfect teethes.
"You're not so bad either" she moan in a seductive voice, placing one of her hands on his chest. The two close their eyes and they began to lock lips, making out for the first time.
"Ewwww!" the girls back in the pool echoed together. This made Jennifer slowly break her kiss from Josh as she looked him in the eyes.
"How about we go leave these kids to play by themselves, and we continue this someplace more private" she suggested as he stoked down Josh's toned arm. Josh then wrapped his arms around her waist pushing her alongside him, Jennifer rested her head on his broad shoulder, as they both head back into the house. The girls just watched as their now grown-up friend left with Josh.
"Did Jennifer just kissed your brother? That's so gross!" Brittney said with a disgusted face.
"I know, grown-ups are so icky" Ashley said in response.
"So... what do you want to do about this?" Brittney said picking up the shampoo bottle.
"Hmm... I know!"