***
Next morning, Aaron woke up. His body felt like lead. He couldn't move. His stomach and balls felt like they'd been put through the wringer.
"Hey, little bro," a familiar voice chuckled from the shadows. Aaron's eyes adjusted to the light. He could make out the gigantic figure of his brother, a 3rd arm beetween his legs, a veritable river of seed dripping out of it and onto the floor.
"Wha..." Aaron tried to croak, his throat felt like sandpaper.
"Here, little bro, have a drink," Kyle boomed, picking his smaller brother up, a small trickle of seed.
"Ha, ha.... I will feed you till you understood how to share family secrets, and the value of blood, and the power of your own body." with these words Kyle opened his mouth and the head of his cock went past Aaron's lips, sliding deep into his throat.
"You can't even imagine how it felt, baby brother, having your mouth around my cock. You are the last one who can handle it" said Kyle as his dick went deeper.
He started to slowly thrust his dick into Aaron's mouth and throat, each time going a bit deeper.
Aaron was so exiceted with the muscle giant Kyle was and his cock was getting rock hard and bigger.
His balls started to ache from the need to cum and his hole was twitching.
Soon Kyle was all the way inside Aaron's mouth and throat.
"Ohhh yeah. Suck your father, little son" he yelled as he came deep down his brother's throat.
Aaron was struggling to keep his eyes open. He didn't have enough strength to resist.
After few seconds, the cum flow stopped and Kyle took his dick out of his mouth.
"Now you are fed and ready to do some excercises" Kyle took Aaron in one hand and lifted him up easily, with his body in one hand Kyle went to the home gym.
"Let's get to work!" he said and placed Aaron on the bench.
"I don't think you have the strength to lift anything, but if you try hard, you might manage a few push ups of normal weight"
Aaron had no other choice, so he tried his best.
He could hardly get the first rep done.
"That's more like it. One more push up and I'll reward you."
Aaron managed another push up.
"Great job! You have earned a treat."
He stood and moved towards Aaron, his massive erection in full view.
Aaron looked at the giant cock.
"What... what are you going to do?"
"Well, you are a good boy, you have earned a treat"
Kyle grabbed the bottle of lotion and squirted some on his hand, rubbing it all over his massive member. He placed the head of his cock between Aaron's legs and slowly inserted the head into his asshole. Aaron couldn't help but scream.
"Relax, this will hurt less."
He then started to push.
"Fuck... FUCK!!"
"That's right. Take it, little one. Take your father's big cock."
Kyle pushed in deeper. Aaron could feel his insides being stretched out.
"Ahhhhhhhhhh..."
Kyle's hips were moving, and his dick was pushing deeper into Aaron.
"Ooooooh, fuck yes, little brother."
He pulled back out.
"Fuck, I missed this. Your ass feels so fucking good."
He started pumping again.
"So fucking tight."
His dick was fully in.
"Fuuuuuuck."
After Kyle was done, he pulled out, panting.
"You did so good, little brother."
He patted Aaron's head.
"Another set, and we've just started."
It took Aaron all his willpower to keep from fainting.
"That's it. Keep going."
Aaron managed three more reps.
It was there toutine for a whole day. And the next one, and the next one, and the next. When Aaron was not able to move Kyle did his own workout and ordered tons of food to keep his body growth.
At the end of the week Aaron mentioned that now his head was almost reach Kyle's shoulders. He knew that he grew but it looks like he grew faster than Kyle! He started to work with more entusiasm.
The two weeks passed and now they were almost equal. Aaron still played his role of the Kyle's son. He called Aaron the biggest, the hugest, the strongest. It was right, because noone on Earth was his weight or height. When they became the same height Kyle prefered to hunch a bit, to be smaller. It was hard because his chest were now huge and wide like two pillows parked one after the other.
After a week he not only drink all cum Kyle was able to provide, but also asked to feed him with the food Kyle usually ordered for himself. Also, when Kyle was sleeping Aaron started to work with the more heavier weights, than Kyle did. After next two weeks Aaron totally outgrew Kyle, he was now 14 feet tall and 1800 pounds. He had dark thick beard, his skin was covered with a thick layer of body hair.
It was a standard morning when Kyle woked up Aaron to feed him with his cum, but this time when Kyle was done and tried to pull out his cock out of Aaron's throat his brother didn't let him.
"What the hell, brother?!"
"You are not done feeding me."
Kyle was shocked.
"What do you mean?"
"I need more of these" he pointed to Kyle's massive nutsack.
"But I just finished my morning cum"
"That was only a warm up"
He use his enurmous arms to lift Kyle into the air and he started to suck his cock.
"Ohhhhh... Fuck!"
Kyle was moaning.
"I can't believe it. I never had a blowjob this good."
"Of course, noone is as hungry as me"
Kyle was getting closer and closer.
"Fuck... Oh fuck, Aaron, I'm going to cum. Oh shit."
"Mmmmhhmmmm..."
Kyle came hard.
"Oh fuck!"
Kyle was breathing heavy.
"Wow, little brother, that was amazing."
"Of course. Now we are equals. But now, I need more of your seed."
"Oh fuck."
Aaron sucked Kyle's dick for an hour, before Kyle started to beg.
With every shot Aaron's body aborbed every energy from his brother's cum and add to his own. His cock grew another inches, his muscles became bigger and thicker.
After an hour Kyle was exhausted.
"Are you happy now?"
"Of course, brother."
Aaron stood up, towering over Kyle.
"We will continue, later."
Kyle was too weak to move, and was afraid to face his brother. Aaron was in their gym trying to find anything that he was capable to call a training weight.
The same situation reoccured on lunch time and at the dinner. Aaron's hunger was unstoppable, his body needed more and more calories. He ate all food they usually ate together and he was still starving. He told Kyle to order triple more next day and went to his bedroom. His heavy steps made the whole house shake.
At morning Aaron was awaked by feeling that someone is touching his morning wood. Kyle was trying to jack him off, but his tiny hands were not able to go up and down his entire dick.
"No, my little father, this is not for you" Aaron's voice was very deep, but somehow sweet.
"You are a good son, you are taking care of me, but I need more to become the biggest."
"No, no, no... you have to feed me and you will do it" Aaron took Kyle by the neck and lift him up, like a child lift a puppy. Kyle's dick were hard and ready to feed. So Aaron with one hand hold Kyle in the air and by his lips he was sucking Kyle's cock.
"Oh fuck... FUCK! What are you doing? Oh fuck, stop it. Ooooh, I'm gonna cum. Aaaaah..."
Kyle cumed hard and Aaron's body started to grow again. He was already over 16 feet and 2100 pounds, but the growth continued.
"No, no, please, stop... Please"
"You will feed me, little father. You will be my nourishment. Your cum will fill me.
"Noooo!"
Kyle was crying and begging. When he was empty, Aaron started to suck his own shlong. Somehow his cum were more powerful and nourishing for him, than others. When he was done his balls were full again. He was find himself when his leg crushed the pine in their yard. Kyle were laying on his hip, exhausted.
Aaron stood up in his whole glory. His 170 feet tall body were huge and powerful.
"Noone is big like me." His voice echoed.
He was like a mountain of pure muscle, hair and testosterone. His weight were near 30000 pounds. His muscles were like solid stones, his arms like a tree trunks. His thighs were so big, that he was able to sit on them and his dick, his dick was like a tower, hanging between his legs. The dark thick fur covered his chest and the dark beard were hiding half of his face. He was so hard that his cock started leaking.
It was a chance for Kyle. He runned to drink the fresh, tasty cum. Aaron was watching his little brother started to grow again. In a few minutes he was near 20 feet tall. Aaron saw this but he decided to help his brother and lifted him in the air and with one hand he put Kyle on his dick. It was so big that Kyle was sitting on it. Kyle went to the head and started to eat cum just tight from that. Aaron was trying to be calm but then he came. The vulcano of cum exploded.
Aaron cumed so much, that their house and all the neighbouring houses were gone. He was moaning and grunting. Kyle dropped from Aarons dick just into the river of cum. It was his own ocean of meal. In a few hours Aaron noticed that Kyle grew noticably and became 100 feet tall. He weighted till he was 130 feet and caught wis all his size.
"I grew you not for your pleasure but to feed me"
Kyle was so ashamed.
"No, please, not again, you are huge. You are the biggest"
"But I want to be even bigger"
Kyle forced Aaron to put his cock into Kyle's mouth. After a short period of time first cum started to grow his bigger brother. Aaron's muscles started to bulge and grow and his cock grew another feet.
"No, you will not do that again. You are huge and big and strong. You are the biggest and noone can compete"
"I'm not asking you" and he continued to suck.
Kyle tried to escape from his brothers grasp but he was too weak. Soon he started to cry and begged him.
At the evening Aaron was 200 feet tall and his little brother 150 feet. Aaron was satisfied and Kyle was not able to move. He was crying all night. The growth speed declined because of the nanural dependecy: each pound of muscle required musch more energy than an inch of height. After a few months Aaron freed Kyle. He became a god with the weight 5000000 pounds, he was over 400 feet tall. His cock was so big that it could crush a house as nothing. His hairs were so thick that people asked to trim him with special laser just to obtain new strong material.
Kyle was now so small . Aaron didn't let him cum or suck him, only sometimes he allowed him a bit of his cum. But Kyle was standing 270 feet tall and had the weight 400000. He was still not the biggest and this fact made him crazy. He wanted to grow but Aaron didn't allow him to eat.
In the meantime they both became legends.