Jake and Elliot are always a pain in the ass for their parents. Always doing stupid pranks and mocking around like nothing cares. However, Adrian and Julia had a plan to enjoy this vacation without worrying about their problem children.
"I think I'm going to the beach. Do you want to join me?" Julia asked her husband but before he could reply, their sons started to fight each other. "What's going on?"
"Jake said I'm a baby because I u can't swim." Elliot was sobbing. "I'm not a baby! I'm a big boy who doesn't know how to swim!!"
Jake and Elliot started to fight each other again. Julia looked at Adrian and they nodded at each other. It was time to put their plan in action.
"Ok, boys. Calm down! I'll be in the beach, if you need me you can find me there!" Julia told her sons who were still fighting and left the room. Adrian stayed with his brat boys. He managed to separate them with his big arms and told them.
"You two. Listen to me!! Your mother and I came here to have a peaceful and relaxing vacation!!" He looked at his sons' eyes. "She won't be taking care of you, and me neither!!"
"It's fine, I can take care of myself." Jake grinned. "But I won't be babysitting him!!"
"I know you won't." Adrian said. "That's why we decided to turn you into adults."
"You what?!" Jake managed to shout before he and his brother started to feel pain in their bodies. They held their stomachs and kneeled as they struggled with a weird feeling going through their bodies. They suddenly got taller in an instant, several inches taller which is insane for any kind of growth spurt.
They were going through a fast puberty. Adrian's sons' bodies were aging at a super fast rate, they would be aging and growing the equivalent of one year per minute. In only five minutes Elliot had turned into a 13 years old guy, just like his brother, except that Jake was 18 years old by now.
None of their shoes fit in their huge feet anymore and suddenly their toes popped out. Their feet had oversized their small shoes and now they have huge size 14 feet. They are going to be barefoot starting now.
Also they were getting even taller than before, Jake went from 5’2 to 6’1 in a couple of minutes and Elliot had gone through an even larger growth spurt and became 6’10. Their bodies have grown hair everywhere and their voices turned very deep.
The changes stopped after fifteen minutes. So Elliot was now 23 years old while Jake had became 28 y.o. They were panting and gasping like if they were completely exhausted after a long workout. Their bare feet were sweating and emanating a strong foot odor and their pants and shirts now looked like painted on their bodies.
"Dad!! What did you do!!" Jake shouted with a voice way more deeper than his former one. He got scared of that and covered his mouth, only to realize that he now has a beard.
"My clothes hurt a lot!" Elliot yelled with a deep baritone and astounded his brother who turned his sight back and discovered that he was facing a mountain of muscles. His little brother was way more taller than him now! Elliot made an involuntary flex and the fabric on his shoulders and back suddenly ripped off leaving his wide chest totally exposed.
"Holy shit!! Elliot? Is that really you?" Jake shouted as he gaped at the humongous man towering him. His nose got briefly buried between his brother's pelt of chest hair on his huge pecs.
"Jake?! You're small and hairy like a monkey!" Elliot replied as he looked down at his older brother. Then he noticed how big was his chest and put his hands on his rock-hard pecs. "What the-?!! My chest is huuuge!! And why is it so hard and hairy?"
"If I'm a monkey you're a fucking simian!!" Jake shouted back as he pushed Elliott away. Despite he was stronger than before, his brother barely moved. The little boy now weighs over 250 lb and his wide feet gave him extra support.
"Hey!! Why did you push me?!!" Elliott moved towards his brother with an imposing pose, they were too close now that Jake could smell some musk emanating from his brother's pores. "Stop touching me!"
"Uh? I'm not touching you." Jake tried to sound as intimidating as Elliot, but despite of his deeper voice he didn't make it.
"Yes, you're touching my pee-" Elliot was midsentence when he looked down and noticed that it wasn't Jake who was touching him. At least, not voluntarily. Their dicks which a few moments ago were as big as little nubs now were obscenely bulging out of their small underwear.
"Aaah!! Something is inside my undies!!" Elliott yelled as he noticed the wild bush of pubes protruding from above. "It's big and furry!!"
"It's just your dick, son." Adrian said as he stayed behind Elliott and then he suddenly ripped off his son's small underwear. Immediately, Elliott's big soft junk jumped out and started to sway side to side for a while like a living creature happy for its freedom.
"What the-!! What happened to my pee-pee?!! Why is so huge?!!!" Elliot started to cry while his dick kept flopping around. "I don't like it! I don't like it!!"
"C-calm down, Elliot." Jake said. He was stuttering as he watched astonished at the huge appendage hanging between his brother's legs. He was so focused on it that he didn't notice his father standing behind him until he pulled his undies down. They got stuck between his thick thighs but it was enough to free his own humongous cock. It was as thick and hairy as Elliot, but a little bit smaller. However, it was his balls which were significantly bigger than his brother. In fact, they were so big and hanging too low that they were still resting on the fabric between his thighs.
"D-dad!!!" Jake yelled trying to sound really upset but the truth was that he's embarrassed of himself. He can't believe it. He was huge. Elliott was even more huge. It was too much for them to process.
"Wow, I'm impressed." Adrian said as he stared at his naked sons panicking as they explore their new hairy selves. "I can see I'll be proud of the men you'll become. Take this opportunity as a sneak peek of your future."
"So, that means I'll be bigger than Jake?" Elliott asked as he felt his juicy hairy pecs. Adrian nodded and he smiled. "Ha! Do you hear that? I'll be the big brother!"
"Good luck finding clothes for that thing." Jake sarcastically replied as he slightly slapped his brother's fat cock.
"Hey! Don't do that or I'll put it in that giant butt of yours!" Elliott yelled as he spanked his brother's new bubble butt.
"You wanna fight, don't you?" Jake got angry as he felt his sore buttocks. "I don't care if you are bigger. I can still take you down!!" He jumped on his brother and knocked him down. His hefty balls were resting on Elliott's hairy belly.
"You won't beat me this time!!" Elliott shouted as he tried to push his brother away. However, Jake was too heavy even for his newfound strength. He was trapped, but he didn't give up. He won't lose, not any more! So, he did the only thing that he could think of.
"Aaaahh!! What the hell are you doing?!!!" Jake yelled as he felt his anus being penetrated by Elliott's monster cock. He screamed in pain as his tight hole opened for the fat mushroom tip that raped him.
"Stop!! You two!! Calm down!!" Adrian shouted as he tried to pull them apart.
"Tou cannot tell us what to do anymore!" Elliott yelled as he tried to push his cock deeper on his brother. "We're adults now, remember?"
"No, you only have adult bodies. You're still my children!" Adrian replied. "And I can turn you into babies if you won't behave properly!!" He managed to separate his sons. "Now, get dressed and meet me and your mother in the pool." He threw them a pair of speedos. They reluctantly took them and watched them for a while.
"They look small." Elliott said. "I mean, they're bigger than our former undies but they won't my new pee-pee."
"Really? You have just raped me and you still call your dick pee-pee?" Jake said as he tried to ignore the huge pain he was feeling on his ass. "But, yeah. You're right. Dad, these are too small!"
"I'm sorry. I didn't think you'll be so... endowed." Adrian replied as he watched his sons trying to wear the small speedos. Elliott's mushroom tip was clearly visible through the fabric while Jake's balls were slipping out constantly as he walked. "I'll buy you new underwear tomorrow. But, for now. I'll see you in the pool!!" He left the room leaving his uncomfortable sons alone.
"Um... I'm sorry for putting my pee... I mean, my penis inside your butt..." Elliot apologized as he rubbed his cock through his speedo.
"Nevermind.." Elliot replied as he adjust his balls inside his own speedo. "So... Do you wanna go to the pool?"
Elliott was thinking. They could have some fun together as brothers plus they could use some time to explore their bodies. But they could stay in their room and have some fun in there.