Jake lets out a light moan, as his body began to bulk up tightening against his kid like pajama's biceps pushing the already strained sleeves up making them tear a bit. Pec's pushing forward and thickening becoming thin shelves to thicker and powerful. His body broadened a bit causing his shirt to tear down the front and the sides. A 4 pac cements itself on his stomach as he feels them out nice and hard as the rest of his shirt tears off. Jake feels it happening to his legs next, his calves and legs broadening and thickening with muscle becoming stronger along with his tight pajama pants tearing up the side and popping off along his waist. Leaving him thankfully or not in his whities with a nice sized bulge underneath.
Jake was now a good bit taller than his brother and quite fit for age too, looking like a young athlete or a gymnast in build , he flexes and smiles before turning to his older brother.
"So...still think your the bigger brother.." Jake says with a menacing glare, Jason quivered a bit and shook dropping down to the floor dropping the remote on the floor as well. Jake smiles as he picks it up , "Thanks" he says getting what is due to him and saunters back to the couch were he plays out and watches his cartoons.
Jason was baffled, what coulda caused this.....event to happen to his kid brother who once was smaller than him , the literal dweb became looking like the heroes in his shows and it sorta played out as such too. The kid ran around the room flexing and posing in his underwear feeling powerful and triumphantly laughing as well. Jason was scared he might be caught up in it and indeed he was as he turned around he was tackled into the ground by his brother. Feeling like a brick wall hit him but it was nothing more than his muscles that made him so strong and tough.
"Gahh jake.." Jason cried out as he was getting up off the floor, but Jake held him down his black matted hair and eyes looking at his brother with a playful smirk. "get down comrade, there's danger afoot." Jake whispers to his brother, he gives him a wink to play along and looking at the muscle boy being ontop of him he didn't have much of a choice. "O..ooh..what danger is afoot...comrade..." Jason says almost too sarcastically as if painfully acting horrendously but ...Jake bought it and his bright kid like smile propped up. "Mr. Mean is out and about, and i need your help to distract him so i can defeat him.
Jake picks up his brother off the ground and points him toward one of his toys that half hazardly and limply laid against the other side of their couch. Jason rolled his eyes. "Alright...I'll do it.." Jason slowly walks up toward the big stuffed toy animal, a dinosaur of sorts. "Grr..im distracting you.." Jason says unimpressed, and undeniably embarrassed before his "bigger" brother jumps off the couch onto the toy and play wrestles with it. "I got him down...but he's getting away..." Jake says tossing the toy at Jason. with enough force that sends him sliding back, reminding him how much strength he gained.. to the point he was even knocked off his feet and onto the floor.
"oh no, man down!!" Jake shouted as he lept up and tackled the two on the ground. Jason shouted out in pain, as he feels his brother bear hug the two of them , making Jason even struggle and Jake having fun laughing as he lifted up his brother and his toy till the struggle had some ...unforeseen consequence. Unbeknownst to Jason's struggle was the beginning of a struggle within Jakes underwear. already hanging on a thread and his bulge already getting aroused but didn't know what this feeling was beyond something good. "K-keep struggling...i think we almost got him..." Jake says with panting breath.. Jason struggled hard. "Jake let me go!!.." Jason said as he wriggled and struggled in his arms hands fanning over his brothers body, as best as he could. He grabbed his brothers strong hips and arms, doing his best to break free before accidently pawing for his underwear causing the strained clothing to snap off . Jakes cock fliped up and out between the two. All 13 inches of it , already quite sizable between the two young boys. "arggh let go...im don with this game.." Jason shouts as he continues to struggle, pulling forward and back left and right. "A-almost...there..." Jake says panting harder...and harder... as he feels the rising climax come from his brothers struggle. HIs cock leaking pre cum on the floor, on the toy and a bit on Jasons leg. Jason struggled harder and faster before one strong pull, "AHHH..mmm!!" Jake moans out as his climax happened cum shoot up hard and fast onto both of their chest and between the 3 parties.
"Ahhh Jake!!!" Jason shouts out as his chest and pants are covered in his brothers spunk, Jake laid down satisfied with himself before letting out a light moan after his completion. The three now sprawled out on the floor, either covered in spunk or not. but Jason was the only one really not satisfied with the situation.
the boys stood up, staring at each other one in silent anger the other in satisfaction, the 5 foot and a good 4 inches 13 year old Jason compared to the 5 foot 10 , 8 year old muscle boy Jake staring at each other where does their weekend morning go next
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