As soon as he clicked the 'apply' option, Brad could feel his body start to change. A warm feeling washed over him. The heat completely enveloped him, and the teenager smiled widely as he transformed.
His muscles quickly expanded to much larger proportions. Biceps swelled and gained more than a few inches, while forearms thickened with more beef. Brad's deltoids became ripped and wider to the point that he could easily accommodate someone on them. Veins crawled all over his skin to feed his muscles.
Similarly, the boy's legs thickened with sinews as his quads inflated. Dense muscle mass appeared out of nowhere, turning his limbs into strong pillars. His calves practically ballooned outwards to keep up with the upper part of his legs. Even his glutes became rock hard.
Brad grinned while the program turned his chest into armor; a total of eight dense abs grew on his belly, creating an impenetrable wall of muscle, and his pectorals grew to the size of book covers. The teen's back packed on a hefty amount of new, sturdy tendons that gave off the impression of a tapestry of defined muscles.
The sensation subsided quickly -- it only lasted for about fifteen seconds or so -- and left Brad with a body that was perfect. He looked at himself in the mirror nearby, seeing a young stud that looked akin to a professional bodybuilder.
"That's what I'm talking about." He chuckled loudly. Brad struck a double bicep pose, watching with glee as 22 inch biceps popped up, "I'm the man!"
His clothes were now accustomed to his new body, having being updated by the Universal Program. Brad was currently dressed in nothing but a sleeveless shirt that was taut around his incredibly muscular torso, and shorts that left little to the imagination.
The buffed up boy continued to admire his body, enjoying the raw strength that he felt course through his veins. All of his muscles were ripped and vascular, but Brad knew that he was even stronger than he looked, since he'd made sure the program would alter that as well.
He turned his wrists so that his fists pointed outwards, before doing a perfect flex that he remembered seeing in a bodybuilding contest. Massive biceps the size of melons swelled even larger, and he could see veins throbbing.
Much to his delight, he noticed a rather large bulge down below. Brad took off his pants and marveled at his giant rod. It was insanely long and fat, looking more like something straight out of a porn fantasy. Big veins similar to those on his muscles were spread out like rivers under his skin.
The seventeen-years-old boy laughed with confidence. He was an absolute muscle stud!
"And if everything went right, I shouldn't be the only one who got better." Brad chuckled as he headed straight for the door.
Information that he had never known before was now inside his head. Apparently, his mother had a genetic disorder that caused muscle hypertrophy, which was then passed on to him and Britney, but not Keith. As result, the three family members were insanely muscular and had to do little effort to maintain their muscle mass.
Doctors around the country were baffled by their genetic abnormality, which was something that multiple scientists had written articles about. After all, the human body wasn't meant to gain muscles at such an alarming rate. At age ten, his sister had already been able to arm wrestle grown men and actually beat them.
The program came in handy if it could change backstories just like that. Then again, it had already proven its use by turning himself and the others into muscular versions of themselves.
Brad went down to the living room, and was floored by what he saw.
Sitting on the couch while his little brother played videogames on the TV, was none other than his younger sister Britney. However, she was anything but the previous sister he had had. Britney was leaning against the edge, with her feet resting on the coffee table.
The blonde teen was dressed up in a sky-blue top that showed off some skin and was tied just underneath her bust, exposing her flat belly. The only other article of clothing left was her shorts, which reached down to around her mid-thighs.
But what really got his blood pumping was how big Britney had become. Huge muscles covered her entire frame, and her short height meant that she looked extremely bulky with all that ripped mass.
Her skinny arms had transformed into thick logs of muscle, becoming wider and defined. Her forearms alone were already thicker than what most guys had -- even among adults -- and then there were her biceps; round and big enough to allow her to compete with bodybuilders. His sister's triceps hung underneath like horseshoes.
Dear god, the blonde girl's shoulders were so wide she took up all space on the couch. They were almost as big as soccerballs, and the lack of sleeves showed off how striated they were, resembling peeled onions. Her tendons were pulled taught everywhere. Her barrel-like chest was a mountain of muscle, with two slabs of pectoral meat slapped on to it. Those same thick pectorals were holding up her E-cup sized breasts, which were perkier than they should be considering their size.
And those abs of her were absolutely shredded! Someone could put a coin between those hard bricks. Brad's gaze traveled further downwards, passing her narrow waist that then expanded as he reached her wide hips. His sister's thighs were massive; teardrop-shaped quads that swallowed every bit of room they could. To him, they looked so dense and hard, yet so soft and invitingly -- albeit intimidating too. Her calves were bigger than a person's fist and would make it difficult to wear long socks.
The program had turned his previously average sister into a sexy powerhouse, who had more muscle on her short frame than most people in the gym. Britney was bigger than an amateur bodybuilder.
But Brad's changes had made sure that despite the added muscle mass, she was even more beautiful. Perfect rosy lips that were just the right amount of plump, eyes that were intense enough to make his muscular legs tremble, blonde hair that was dazzling, gorgeous features that made his heart beat faster... And then there were her curves; out of this world and enhanced by her muscles, but Britney's huge breasts and massive muscle butt definitely contributed. She looked as if she came straight out of a porn movie!
Britney stopped looking at her phone and caught him staring lustfully at her massive body. However, she didn't react negatively -- on the contrary! His sister smiled slyly as she shifted on the couch.
"See anything you like?" She teased him, lowering her eyelids in a seductive fashion.
"I'm absolutely loving it." He responded immediately.
And it was true. Brad loved his sister's bodybuilder-sized body and massive tits. They were exactly as he had imagined them in his fantasies.
And much to his delight, Britney seemed to be ecstatic at his response, "I'm so glad to hear that. I know we're roughly the same size now, despite me being younger. Of course, I know you don't mind it that I'm working out so hard and getting so much bigger. Being huge has so many advantages. The raw power is amazing, and I look absolutely stunning, but the best part is how I can make you happy with these strong muscles of mine."
Britney's voice oozed pure sex appeal, and combined with how she rubbed her hands over her extremely-muscled body, she was causing his huge dick to stiffen. Her eyes lit up in recognition and delight.
"Are you getting excited, dear brother of mine? Because of this?" She flexed one of her massive pipes, forcing the muscle to dance at her command. While her bicep swelled larger, Britney raised a leg and did the same to her thigh, causing it to explode with dense muscle mass, "You can tell me. After all, good sisters love and do anything for their handsome brothers."
As if to go even further, Britney smiled cutely as her free hand inched closer to her massive burst. Her fingers caressed her huge tit and even squeezed it. His sister licked her full lips sexily, and at that very moment, Brad knew he had turned his sister into an amazon seductress.
"Ew! That's gross, Britney!"
Brad rolled his eyes at Keith's interruption. Stupid little brothers...
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