Dan glared at his cousin, unable to contain his annoyance with the girl any longer; she might be tall for her age, but she still acted just like a little kid. Would it kill her to be just a little more mature... no, scratch that, a lot more mature. At that moment, time appeared to slow in the world that surrounded Dan, all else fading into the background save himself and his cousin Laura. His gaze was still locked on her, but he could tell that something strange was happening, an unusual pressure building up inside of him. Strangely, the only thing that he could think of were the words he'd uttered not a minute ago: "You're so immature - I wish you would grow up a little." Then, just as suddenly as it came the pressure vanished, a faint popping sound emanating in his ears, causing them to ring. Sighing softly, the boy tried to return to his breakfast, but found his form held fast, unable to look away from his little cousin; he blinked, reaching up and rubbing one of his eyes. That was funny, for a second it had almost seemed as though the girl was...
"Bigger," he mouthed, his lids opening wide as they beheld the sight before him. Laura's height had always vexed him to a certain extent, since even though she was 3 years younger than he was she'd somehow managed to end up just as tall as he was, even thought puberty hadn't really caught up with her yet. Dan was embarrassed to be seen with his younger cousin, since it just wasn't right for a girl her age to be that big; it made him feel somehow... inadequate. Now, he watched with rapt attention as Laura started to stretch even larger, her legs somehow lengthening before his very eyes, the rest of her body soon following suit.
From her already striking height of 5'6", the girl slowly grew to a statuesque and imposing 6'2" before the spurt finally halted, her head now several inches above that of his older sister Ashley. The changes weren't yet finished, however, as her body began filling out to match her new frame. Laura's legs swelled within her pajamas, eventually sending tears streaking down the inadequate garment as her 'pants' struggled to contain the mass within; a quick glance down saw her bottom now comfortably filling the entirety of her seat, with a little bit even left to spare. His cousin's tummy lengthened and then flattened, all of the baby fat that had formerly comprised her torso now centering solely on her chest, a pair of small, perky breasts already poking through her top. The shirt would go on to fight a losing battle against Laura's burgeoning boobs, more and more flesh getting packed into the pair before they finally settled at a small D-cup. The girl's face matured just as much as the rest of her body, her cheeks thinning and her lips growing subtly more plush, a mischievous gleam finding its home in her bright green eyes.
Finally, her clothing shifted as well, the straining pair of pajamas becoming a tight, white T-shirt that hugged her huge tits and left just a single, pale line of midriff in view and a close-fitting pair of yoga pants that left nothing about her full, lengthy limbs to the imagination. Laura's hair was tied back in a pony tail and her body seemed to slouch slightly, relaxing with her long legs spread wide beneath the kitchen table. In a matter of mere moments, his cousin was 'little' no longer, appearing to be a... very nicely grown-up girl so far as Dan's eyes were concerned. Then, with another blink, time finally started to flow once again, his gaze able to fall back to his breakfast as the rest of his family continued to eat as though nothing had happened. A quick glance confirmed that the Laura across from him was still the much larger version of herself, his cousin now subject to what he could only describe as a series of jealous looks from his older sister.
"So, how was the last day of school for you two kids?" His Dad queried amidst a mouthful of toast, earning a brief glare from his mother.
Laura smirked just a little, her attractive lips pursing before she spoke. "Agonizing. Can you believe that Mrs. McCarthy kept our last period class until 10 minutes after the bell? Still, short-stuff here kept all of us amused with some Grade A jokes until she finally decided that we were free to go." She reaches over and pats Dan right on the top of his head, a faint few giggles coming from the other people at the table. The boy was too shocked to even respond to the teasing however, a startling realization hitting him: this version of Laura was only 14? No wonder Ashley was jealous of the girl; she was not only taller than his 'big' sister, but had bigger breasts too. All of that while she was still 6 years younger than his sis; Dan had to resist the urge to let his own jaw drop, Laura's current position giving him a perfect view of her sizable chest. The boy manages to limit his response to a gulp, glad when the girl finally returns to her seat, slowly craning his eyes back towards the rest of his family.
"Well, at least you two managed to make it through okay," his mother giggles, one of her hands held protectively over her lips. "More importantly, what are your plans for today, now that your summer vacation has finally arrived?" At that moment all eyes, Laura's included, turn to Dan, looking at him expectantly. The boy gulps again, his eyes briefly flicking to his cousin before he manages to open his mouth.
"Well, ah..."