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Dad's Growth

In a quaint suburban town lived a family of muscle heads. They were the Brooks. The father who went by Big B was a black Caucasian Shepherd dog. He was a towering figure in person and as the owner of the only construction company in their town. Ever since high school Big B was an avid sports fur, more specifically a star in the wrestling ring. Till today the local high school display his award for bringing home the trophy in the wrestling championship on his own, a feat that no one had ever accomplish ever again.

Sadly after graduation and starting a family at 18 the dog did not maintain his physique. Once a prime example of physical prowess, the shepherd had been reduced to a bear like build. His once hard washboard abs was replaced by a soft gut. What used to be a dense barrel chest and powerful titanic thighs were now soft and smoother a little. Even his once powerful grapefruit sized arms that could carry half the cheerleading team had grown weaker. He was fortunate that his long fluffy fur made it hard for others to see what had become to his body.

Still the other furs respected Big B for his work and effort as a single father. One drunken night after the prom with the captain of the debate team resulted in a shotgun marriage and the arrival of a beautiful baby boy. Big B's wife wasn't satisfied with being forced into the role of a mother at such a young age so they filed for a divorce in less than a year, but the baby would stay with him. He worked hard to build a proper home for his boy, started at the construction company as nothing more than a grunt worker but he worked his way up and rubbed elbows with the right fur until he could set up his own company.

Soon he moved from a run-down apartment to a proper terrace house where his son could grow up well. The pup was named Benny. Like his father the pup was tall, by 15 his head was the same level as his old man. His fur was jet black from head to toe with patches of orange on his back and forehead. He also inherited his father's love of sports as he led the school's football team, and after joining college he continued the sport he loved.

Big B could not deny that he felt a pang of jealousy watching his son reach the same level of musculature he had at that age. It reminded him that he was getting old. Determined to make a change for himself while his son was away in college he would do everything it takes to build his muscles again.

In now times, Benny was due to come home for his 2 week semester break. Sporting a plain blue t shirt and jeans the 19 year old dog slept throughout his bus ride home as the weeks before was crammed with finals and overdue assignments. He could not wait to crash on his old bed. By the time he reached the bus stop his phone showed that it was 6:30 p.m. His dad promised to pick him the night before, but he never showed up. Another reason for Benny to be concerned, already on the phone his dad sounded weird, he kept breathing heavily into the phone and weird groaning sounds came from him.

After waiting for an hour with no dad in sight Benny decided to lug himself and his backpack on foot. The young pup reached home at 7:30 p.m. Panting heavily with his tongue out he really wanted to give his dad a piece of his mind. As he approached the door his ears perked up to weird sounds coming from the inside. Pressing his ear against the wooden white door he could hear odd squishing sounds like someone walking through a puddle. Then he heard his father's gruff voice grunting and saying "Fuck". Was something wrong? Was his dad in danger? Benny had to find out.

Unsure of what to face if there was an intruder he planned to tackle them on sight, and if his dad was injured he had to run fast to get help. His heart was racing, ready to burst out of his chest as he knocked on the door loudly. It was when he heard his dad's reply that all the tension within him was sapped away.

"H-hold on," his dad's voice said.

The door flew open and Benny was left speechless at what he saw. His eyes were staring straight at the largest pair of pecs he had ever seen. They were large enough to be mistaken for watermelons. Benny had to take a step back to see the massive creature taking up the entire door frame. The creature's feet were massive with thighs so wide and thick that it could crush an entire bike. Hard 8 pack abs lined its stomach area. It wore a yellow jockstrap that did nothing to hide the thick semi hard dick the size of Benny's forearm and two massive globes that hung beneath the member. And still that wasn't all of it, the rest of the creature's arms and head was hidden away by the small door frame.

He didn't want to believe it but the creature had to be his father. "D-ad?" Benny called out softly.

"Son?" The creature ducked under the doorframe and true enough it was his dad. The older dog's fur on his head was messier than usual. Benny just stared in awe at his now 7 foot tall father. Questions ran through his head but before he could speak, two thick hands grabbed him from under the armpits and pulled him into the tightest bear hug he ever had. His snout was buried deep in the cleavage of his father's pectorals.

"Son! So good to see you. Look how big you are now," Big B said. The older dog was swinging his son's body left and right excitedly without realizing that his son was beating on his chest with all his might, trying to get his attention.

It was when benny's foot accidentally rubbed against his dad's dick that Big B looked down between his pecs and realized his son wanted to be put down.

Benny gasped and coughed. The scent of his dad's musky and sweaty fur was stuck on his nose. "D-d-dad. What the fuck?"

Big B chuckled. "You like it son?" the older dog raised his right arm and flexed, the thick arm bulged up to the size of a bowling ball. "Daddy's been working out!" he said before bringing his arm close to his snout and licked it.

Benny was unsure of what to say, but he had to get his suddenly sexy dad inside. "Dad No! The neighbors will see," the younger dog pushed his dad on the stomach but the larger dog did not budge.

"Pssh, it ain't something they haven't seen. Heck Bob next door saw me naked yesterday. I'm sure he enjoyed it," Big B replied.

"DAD!"

The humongous dog then started backed away inside just to satisfy his embarrassed son. Benny thought things would be better inside but he was wrong. The entire living room was empty of all other furniture except for the old couch which looked like it was on its last legs-literally. Bottles of protein powder and unknown supplements littered the corner to the left of the door. A lifting bench with barbells and several dumbbells took up most of the living room space. Gone were the family photos and the flat screen TV. Benny noted what looked like wet stains on the ceiling, there were more all over the floor. His nose twitched and he nearly recoiled upon realizing what the stains were-his dad's cumshots.

"What did you do to this place dad?" Benny asked, concerned.

"Just moved some things here and there, the TV is in your room now and the pictures are well anywhere that isn't my gym," Big B said. The hulking dog walked over to the sofa and dropped his heavy frame on it. The poor sofa creaked and bended itself to support the dog's weight.

"I just can't believe this. I go away for 2 semesters and-and you trash the house, and you turn into a muscle monster." Benny started pacing while trying to avoid looking at his dad's almost naked body.

Big B scratched his bulge and replied, "Son relax. So your old man went to the gym and grew a bit. I thought you'd be proud of my gains. "

The two just looked at each other for a minute. Benny was still half dazed by what was going on and his dad didn't seem to care. Even now when he was trying to have a serious conversation with his old man the Big B was bouncing his pecs with a cocky grin.

"Dad..." Benny extended the word. "I need some rest. We'll talk about all of this tomorrow." Benny made his way upstairs.

"Sure son," Big B said with a hint of disappointment in his voice.

Once inside his room, Benny dropped his backpack on the floor. His room was basically unchanged. His bed still faced perpendicular to the entrance with the TV now in front of the foot of his bed. To its right was his closet. The pup locked his room door and collapsed on his bed. He stared at the white ceiling wall and started thinking about his dad. The way he lifted him with such ease, the way his muscles smelt when he was pressed up against him.

Covering his eyes with his right arm Benny unzipped his jeans to release his throbbing boner. Another trait he inherited from his father was a thick fat dick with huge swollen balls the size of golf balls. It paled in comparison to his father's enlarged furhood now. All the questions were just a façade to hide his true feelings. He loved how his dad had grown so huge. He never told anyone before, but he was gay and his dad was now the fur of his dreams. Stroking his leaking cock, Benny imagined growing into his dad's size as well. He imagined ripping through his clothes in public as his pecs balloon out and eventually blocking his view from the rest of the world. Benny moaned loudly. How he wanted his arms to expand and grow in strength so that he could lift an entire car with ease. Pre-cum continued to ooze from his dick, lubing the entire shaft. Then he would outgrow his dad and be able to pin him to the ground. He would then shove his giant dick between his dad's hefty pecs and pec fuck him till he came. The last thought sent Benny over the edge causing him to blow his load all over his shirt and snout.

"Fucking dad..." Benny whispered to himself.

Stripping his shirt off, Benny sneaked out of his room not wanting to be seen. The bathroom was right beneath his room but he would have to go through the living room to get to it. Benny tip toed slowly, his tail was erect just to avoid making a sound with it dragging on the floor.

As he was walking pass the hallway to the stairs he saw his dad's wide black furred back facing him. His dad turned to the side to face the sofa and Benny saw him hold a vial full of glowing neon blue liquid. Benny crouched down to get a better look. He wondered what was that his dad had. Then the older dog downed the entire concoction without letting a single drop spill.

Big B started staggering backwards with his arms locked into a boxer's pose. He started growling and his entire body shook. Benny could not believe what he was seeing his dad's entire body began to swell. His already huge pecs extended out further. Benny gasped as he saw his dad's shoulders stretch further to the sides, he was wide enough to take up three quarters of the sofa. His arms ballooned up to the size of Benny's head. Deep veins began to snake around Big B's arms and legs. The change in height then soon followed slowly but it was very noticeable that the older dog was growing several inches taller with each passing second.

"Argh...Must Grow! Bigger!" Big B said followed by a deep growl.

The growing dog's bulge began to grow as his enlarging dick grew harder. Big B's jockstrap was beginning to rip at the seams struggling to contain the thick pole growing to the size of a traffic cone. With a guttural roar his dad's cock fired its load, splattering the sofa with white spunk and the torn remains of what used to be his jockstrap. He cummed for what felt like minutes, completely covering the sofa with a new coat of paint. Finally when his orgasm completed the muscle bound dog just stood there panting heavily.

Benny was feeling a mix of emotions at what he saw, awe, fear, lust, and disgust all at the same time. The young pup walked slowly downstairs never taking his eyes off his gargantuan father. As he approached he saw another change, that his dad was losing back his gained height.

"D-ad? Are you ok?" Benny asked.

"Son?" Big B was surprised by his son's presence. He looked at his shirtless child and walked closer to the frightened pup. Towering above the smaller dog, his cock sprang to life, slapping against his hard abs with a wet thud. "You saw something you shouldn't have boy," he said menacingly.

Benny gulped and thought to himself, what did he get himself into this time?