So first this is a scene from a story I did. Art provided by  Thunderkid92 I had been on a fat Shad kick and thought it be fun to go all out.

FAIR WARNING extreme fatness ahead so read the story at your own risk. Also some swearing too if you're not a fan of either. No hard feelings if you don't want to read it.

Here's the story

Shadacus was busy working on a new potion one that once it was laced on food it would multiply it over and over again. With a few tests Shad saw it was a wonderful success and started to bottle the liquid into little glass bottles. Halfway through Shad felt a bit weird around his stomach. It was a rather fuzzy feeling like a sudden surge of warmth. He thought he was getting sick so he hurried bottling all of it up. Rushing only made him spill a bit more of it on him.

When the work was finished Shadacus stripped naked out of his work clothes and took a nice long hot shower. Kat was out for the day and would be home late but Shad didn't mind he laid in bed hoping his stomach pain would go away. It didn't, and it seemed to get worse and worse. Later that evening Shad stirred to a bewildering noise, a terrible growling sound could be heard from his stomach. He sat up to see what the matter and much to his suprise.

Shad saw his once trim stomach was now a chubby ball sticking out in front of him. He gently poked it a few times and sure enough it was him all doughy and soft. He jabbed it once more with some pressure and it didn't go away. Tho he heard something behind make a noise. He gulped and looked behind him, nothing seemed wrong, he slowly got up and had a look in the mirror. Looking at himself in the full length mirror he could see his ball of a gut pushing out against his shirt but not much else seemed wrong.

"Wait since when...?" He paused as he looked at himself again. He didn't see anything at first but he gasped at what he saw next. Before his eyes he saw his arms begin to puff up with fat. Not alot but it was enough to notice. His legs swelled up starting with his hips and thighs as they widened and thickened. His once loose boxers become uncomfortably tight across his fat thighs and began to tear. The legs of them quickly lost the battle but the groin area and what bit of fabric covering his butt held on as his waistband stretched.

Shad wasted no time, he had a usual cure all for mishaps like this and had some of it tucked away in his room. He went to it's hiding spot near his dresser and opened a secret compartment. There waiting for him was a glass bottle with a glowing white liquid inside. He drank it hoping that should solve his problem. It seemed to work as he felt all his growing stop. Shadacus slowly walked back to his bed and laid down hoping if it was done right perhaps he'd even shed the weight off.

Little did he know it only aggravated his condition. He opened an eye just in time to see his belly surge forth. It spilled over onto his lap and down his thighs. Shad groaned as he didn't want to get fatter. He didn't seem to have much of a choice as he heard a familiar groan and ripping sound. His butt dramatically swelled in size ripping what remained of his poor boxers. His legs swell in size as they began again now some of the blubber getting into his shins and calves. Frozen to the bed in shock, all he could manage to do was sit up onto the bed as two heavy moobs surged into view. He gave them a squeeze to make sure they were really his. To his suprise they were, as was the rest of his growing form. With a belch he saw his gut grow out more.

Shad groaned as he watched his figure swell in all directions. His once toned back now softened and began to form a couple rolls. "Thankfully my hands are..." he stopped as he looked at his hands and nearly screamed as he saw his hands were now thick with ample amounts of fat. He knew if things kept up all of his body would be like this. He had to act fast if he wanted to work this off and mobile for that matter. "Come ooooon THINK!!" he scolded to himself.

Then the idea struck him like a bolt of lightning "Of coarse! I keep a reversal in Kat's lotion box!" He said as he went over to his lover's little box where she kept all sorts of lotions. His body swelling up made the short journey seem to take nearly forever as he wasn't used to carrying so much mass on him. He remembered all the times he had playfully put some secrets into her lotions. Tho he always kept on hand a reversal bottle that eliminated any and all magical phenomenons in someone's body. The problem now was he couldn't find it, quite a few bottles were in the box, and any he did recognize as his little gifts to her. Had no labels to speak of on them. This gave him only one idea. Coat himself in as much of the stuff as possible and hope it works.

Lucky for him he was already naked except for his now pretty small shirt. Which he swung off him before it ripped off him and began to splash as much of the various lotions onto his body hoping one was the neutralizer. He put some on his swollen fat cheeks, his chins, his moobs his gut, everywhere he could possibly reach til his furry skin was caked in his cocktail of lotions.

The room fell quiet and he didn't hear a sound. He sighed in relief and climbed back to bed. He sat there breathing a bit heavy. Now stuck somewhere around nine hundred pounds he was definitely having difficulty with mobility. He perked up when he heard something short of a gurgle from his gut. Like a bubble was brewing in his stomach.
"Oh please let it just be a fart!" He thought to himself. Out of nowhere Shadacus let out a sneeze, this sudden disturbance caused his short gas bubble to expel out his rear making his poor bottom surge forth again with growth.

Shad looked back in horror and realized what this meant. He slowly turned his head towards his front to see his paws grow thicker than his hands. Developing some cankles they began to sag over his swollen paws. His gut grew wider and fuller and began to spill over his sinking knees. His arms grew flabby and sagged more as he developed some very large bingo wings.

"Oh damn, oh shit!" Shad panicked in his mind. He was swelling bigger and bigger at unprecedented speed. He huffed as he was amazed at how fast he was swelling. Already a few minutes in and now his gut was reaching past his knees and headed for his swollen cankles. Now realizing his mistake all he could do was ride it out. He let out a soft moan as he rubbed at his gut. The upper part of his arm was starting to look like a huge frosting bag half filled with lard as he kept growing. Shadacus was starting to slowly find a pleasure in all this growth. In some weird way it just excited him. He cupped his swollen moobs with his sausage fingers watching them ooze out of his hands before letting them go. He watched as they pushed towards the crest of his belly. His gargantuan gut swelled and flowed it's way forward and to his sides covering his massive legs. His tail wagged a bit as heavy rolls on his back began to push towards it. There was no mistaking it he was getting huge and quite quickly.

The bed soon began to seem smaller and smaller as he grew wider and fatter with each moment. There was no sign of it stopping and he was running out of space. In no time his flab began to ooze off the bed and began to fill all around him. Shad was actually a bit excited as he watched himself grow, groping whatever paw fulls of flab he could grab. His flab continued to flow onward, along the bed and out towards the rest of the room. He continued to swell and grow through the evening.

It was late when Kat came home having had a lovely spa day with her mother courtesy of Shadacus, she strolled into the manor.
"Shaddy! I'm ho~ome" she called cheerfully.
No response could be heard, she was used to this and began to check his usual places she could get to. He wasn't in the den, nor in the study, why she didn't even catch him making a late night drink in the kitchen.
"Hoho early night I bet" she mused to herself as she went up the steps to their room. She came to their door, opened it and nearly fell over in shock. There in their room emanating from their bed sat a big blob of wolf fat. Shadacus was now colossal in size at least two to three times his height in girth and width. He leaned his head into his enormous cheek towards her.
"Oh ehheh hiya hunny" he said a bit nervous. "Have a good time at the spa?"
The room was a bit of a mess what with some of his blubber had pushed into objects and furniture that was near the bed. This usually would of made her mad but seeing him like this she now had other ideas in mind.
"Why yes hun very nice time" she purred and slowly strolled towards him. She grabbed hold of a belly roll and began the climb up to his fattened face. Nestling her lower half of herself on his softened chest between his humongous moobs. She gently pecked one of his massive cheeks.
"Had fun playing in your own potions huh?" She teased purring louder. Shad blushed hard not sure what to say about all this.
"Uuh something like that" he said.
Kat purred loving how huge he was and gently played with one of his chins. At this size he was nearly helpless, his limbs were prettt big. He could hardly lift an arm without some struggle and forget if he could stand with so much mass to move. Even if he could his hands were surrounded by rings of flab from his wrists, forearms, and upper part of his arm. Tho it seemed to stop before it could even get halfway there. His paws suffered a similar fate as his thighs covered what must of been a quarter of his shins and cankles. His ginormous hips puddled to his sides as they were riddled with rolls of fat.
Kat loved his bloated shape as she examined him over with a growing lust in her purr. She finally turned to him and put her nose to his.
"So tell me, do you like this? Being this fat?"
Shad began to sweat realizing the shoe was on the other foot so to speak. Then he realized something as his expression suddenly changed on his fat face.
"Yeah as a matter of fact I do." He said with a big grin.
Kat giggled softly "Good because this is just skinny to me" she teased.

"S-skinny?" He shrieked "But look at me I'm a-"
Kat put a finger to his lips purring louder still "A stud is what you are" she cooed as she reveled in his flabby form. She giggled softly as she got an idea and slowly disappeared from his sight to return moments later with a familiar looking bottle with a familiar liquid inside.
"Is that?" Asked Shad.
Kat only giggled and came up to his head and put the bottle opening in his mouth "Don't worry just drink up" she teased.
Shad could only do so but he was curious to see what Kat would do. After the last drop of potion touched his lips he felt very hot all of a sudden and could only watch as he began to grow bigger again. His stomach surged forth as it rumbled and gurgled growing even bigger and flabbier. Slinking along the floor as it grew. His hips now massive and heavy sagged off the sides of the creaking bed. The bed may have been built to hold massive amounts of weight but it had never been tested like this and was slowly losing the battle as the frame bent inwards from the sagging matress. The box spring long since broken.
Kat only purred louder and whispered in his ear "Grow fat boy" she said as if to encourage his body. Shadacus grew, and grew, and grew some more. Then there was a loud snap and tho he didn't have far to drop it was clear the only thing separating some of his undercarriage equipment and the floor was now the broken remnants of their bed. Kat giggled with glee. She watched as his filled out fingers sunk into the flab that made up what was his hands and even those were sinking into the ring of flab that was once his wrist.
His once chizeled jaw line now sunk into the ring of fat that stemed from his neck. More rings of fat formed as he was more flab than wolf by now. Huge puffy cheeks easily marked his face as they rose higher and higher and higher towards the tip of his ears. His once some what defined forearms slowly covered his fatty wrists and were now being consumed by the giant flab pillars that were his arms. His legs soon fell victim to a similar fate. Much to anyone's suprise Shadacus's biggest features were easily his growing gut, his widening hips, his colossal ass, and above all those sagging heavy moobs. Kat sat comfortably between his cleavage as he grew and swell. Shad moaned loudly in excitement reaching a climax he didn't think possible from growing alone.
When he finished growing and he filled more than the room itself as part of him spilled into the hall and the room next to theirs with his gut. Kat giggled and snuggled in his flab.
"Well big guy hope you're ready because now it's my turn to get off" she teased as she crawled about him playing a game of her own. What soon ensued anyone could guess.