“I feel funny again…” that was all Kyle could say before the next wave of change hit. His body surged and pulsed violently, he threw head back from the quick euphoric growth, eyes shut tight, teeth gritted and grunting, arms locked half raised at his side, legs spaced out firmly. He almost looked like a dragon ball z fighter powering up.
Kyle was overwhelmed by all this “Grrrrrrrr… big brother! Ahhh I-I can’t stop-it!! Help!!! He desperately calls out.
Stunned you stammer “I’m here Kyle” you say but what could you do? Your powerless to what ever was going on in your not so little brothers body.
More hair sprouted up on his body. His balls dropped lower and got bigger and hairier, his dick elongated and grew more veiny, then got excited as it pointed up and out leaking.
Kyle was consumed in euphoria at this point “Ah-ah oh-ho b-big bro th- ugh -is feels s-so good… huff”
You knew that if Kyle could move like last time he would be touching himself right now, once again strong that magnificent cock and probably playing with those nipples now spaced far apart upside down on that growing chest.
The bush around his cock grew into a magnificent mane that traveled up his belly as thick abs burst forth and across a widening chest that was blossoming its huge pecs.
“Ohh… gosh-ah big bro…ther oh!” Kyle called out lost in pleasure.
His legs and thighs expanded and grew a dark forest of hair as did his arms that looked like pythons, his shoulders bursted out with his neck following shortly after with a Adam’s apple poking out just as the chest hair sprawled up.
You could not help but think explosion of masculinity would fit this strange situation any better as you watch the final transformation.
Kyle’s face squared off and hardened finally in the shape of a man, hair sprouted his jaw and chin meeting with his mustache and then formed into a lumberjacks beard, with one finally burst his mature body grew more till finally reaching an astounding 50 feet then it settled leaving Kyle with gigantic body of a man in his late twenty’s or early thirties.
“AhhAaaaUugh!!!”
With a mighty bellow Kyle bust his nut and squirted what appears too be gallons of spunk all over the ground. Then swaggered and toppled over onto his back on what was left of the yard, with a mighty crash and earth shaking thunk breathing heavily.
Running over to the giant man that was once your little brother you call out “Kyle!? Kyle!?”
Sprawled out on the lawn in rubble Kyles gigantic body was breathing deeply, eyes lost in satisfaction on his mature and bearded face from the orgasm. Slowly you walk up to his head and place a hand on his cheek.
“Kyle…” you meekly say
Kyle wakes up from his afterglow notices you and slowly turns to face you and says sheepishly “looks like… I’m the big brother now huh?”.