Unexpected Growth

Story by poweron on SoFurry

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A short (unfinished) story I put together in some of my spare time. Its basically pure transformation smut with very little story.


A short (unfinished) story I put together in some of my spare time. Its basically pure smut with very little story.


He lay on the bed, the sheets strewn around him. He was naked and staring down his chest at his manhood. He grabbed the salve that he had purchased. It was a black coarse material that hurt his fingers just touching it. He began rubbing it around his crotch as the directions indicated. It left a searing burning sensation that quickly started to feel like it was burning his very skin. He began stroking his member, it bulged and elongated, but it was its normal length and girth, nothing was different. He sighed. After a few minutes nothing was happening and his desire lessened.

Soon he was back to where he started. He began drifting off to sleep when he felt the burning in his crotch begin to intensify. He sat up to see his penis start to stretch, out and out only millimeters a second at first. He started to feel incredibly horny, blood was rushing to his crotch with alarming speed. Soon his penis had gone from a measly 5 inches to almost 7. Precum started to stream out of it and drip down its length. He had never felt so horny in his life. Soon his cock's head started to darken and reshape into a point, his foreskin thickening all the while. A strange pressure was growing at the same time in his mouth. His teeth began biting into his upper palette. White cum began seeping from his growing urethra replacing the yellow precum, dripping down his manhood.

His balls where throbbing, pushing cum forcefully through the base of his clenching penis. Soon they began to convulse, with every shiver and throb they gained size. Within minutes his testicles were the size of small oranges, pressing painfully into his sack. He grabbed his balls with his hands, massaging them to try to alleviate the pain. His face started to push out painfully as black fur started to cover his torso.

His cock was at least 12 inches long by now and throbbing almost painfully. Its huge head throbbing with hot blood, he could feel his shaft beckoning him to ejaculate, a mixture of precum seeped out of him in a small river. Finally he felt himself tense, his huge balls squeezing hard, his cum streamed out of him in a huge arc and landed on the floor with a series of splats. He felt his penis start re-tensing, harder than before, his urethra pressed shut hard, his shaft as hard as a rock. Veins were building out of it. Something was wrong, his penis started growing again, extremely painfully. "No...no...why wont it stop....." he screamed through his sharpening teeth, his face more canine than human.

He arched his back as arcing pain coursed through his body, his penis growing out and out, veins popping out of his neck as his body gained bulk. Dark gray fur was coating his whole body from his crotch. His testicles were now dangling in their giant sac, pulsing with power, the skin around them becoming increasingly tight as they grew. His hands massaging their massive girth. His penis's head was more becoming sharp and canine like with every exertion, every inch his shaft grew huge shocks of pain and pleasure coursed through his body. Soon his balls were the size of large grapefruits, he couldnt hold it in anymore.

A huge stream shot again from his changing manhood, so violently it hit the ceiling. He was losing himself to the lust, the insatiable lust that filled his every thought, he didnt even notice as his legs reversed themselves and huge claws pierced through his fingers. "No....noooooooo!!!!!!!" he screamed as he was filled with heat and desire. "Urghhh....uuuhhhhh.....uuuuurrrrhhhhh" he moaned as his penis began unloading massive amounts of cum in powerful spurts. Every few seconds his penis tensed, his huge urethra expunging a horrifying amount of fluids. His member was almost a good foot and a half long and thick as a small log. His hands had become clawed and massive, big enough to put his hands around his new member. After a while the ejaculations ebbed and eventually stopped. The remnants of his last ejaculation coursing down his member.

He was entirely werewolf now, no trace of his body reflected almost any relation to humanity. Dried cum splattered the room and his fur, his huge testicles were throbbing as they worked hurriedly to produce more semen. He half moaned half growled as he sat up from the bed, he was taller now and his reversed legs were initially hard to stand on. His penis was sagging but still fully exposed from its short sheath. He still was him, his mind wasnt lost in the transformation, besides a werewolf-induced haze of lust swirling in the background.

It was then that he heard the knocks on the door. He panicked, it was Sherry, and she had a key. He ran to the closet to try to put on some clothing, his new body was a tight fit in just about everything. He tried to put on a pair of underwear but his thighs nearly tore every pair to shreds, not to mention what was hanging between his legs. He tried putting it into the pant legs, its huge girth was too much to hold and the pants ripped. Finally he got a pair to stay on, if only tenuously, his giant penis protruding out of the front along his stomach which was the length to one of his thighs. His balls were being squeezed far too tightly, it felt like the underwear would explode at any moment. They were barely covered by the underwear, barely half of their huge furry sac stuck under the strained tidy whities.

He heard the door handle clicking open as he struggled into a pair of his previously baggiest jeans and shirt. "Ron?, are you in here?" he heard Sherry say from the living room. "I...ummm....was sleeping" he said as calmly as he could through the door. Without warning the bedroom door swung wide open and Sherry was there in the hallway. Her eyes were bulging out of her head, she was stuck in almost a mid-scream expression. He walked toward her to explain when his underwear snapped and his already exposed manhood came pouring out. He grabbed it trying to shove it back into the shreds of underwear, anywhere away from Sherry's view. It was no use, and now it was starting to drip pre-cum again and re-harden.

Sherry ran to the phone, and began dialing 911. Ron was suddenly overcome by fear and lust. His penis began swelling again, its huge head flaring as it escaped its sheath. A long moaning growl escaped his muzzle as precum steamed out of him, splashing onto the floor. On all fours he ran down the hall, his huge manhood bouncing up and down, slapping his stomach, his testicles began convulsing halfway down the hall, filling his shaft. Soon he was standing upright and erect in front of Sherry again. He ripped the phone from her hand and in the same movement tore a gash in the side of her clothes. Then with one large thrust he jammed his huge penis into her vagina, piercing straight through her torn skirt and underwear. The head of his shaft was all that he could get inside her, and even that was too tight of a fit. Her eyes bolted open from a mixture of surprise and pain. Her mouth gaped as he unloaded spurt after spurt of cum deep into her.

By time he had regained control of himself the deed was done, he pulled his head out of her with a massive shurlp and left her shivering with cum dripping out her. Her hips were entirely covered with it and her soft pubic hair was entirely matted. A trickle of blood ran down the bottom of her vagina. He tried to apologize but found that he could do nothing but hunch there and stare at her. Deep down inside he knew what was coming. His huge penis temporarily sated sagged to the floor, remnants of his exertions dropping out of its huge head. She was crying, her face was soaked with tears and sweat. She couldnt believe what just happened, what was sitting right in front of her, or how she had just been so violated. Her vagina which was leaking a steady stream of cum from his banging began to redden. Soon it was beet colored, the veins were almost popping out of her skin. Her clit was swelling too, it stood out at full attention, hard as a rock.

Sherry was still crying and barely noticed the changes to her nether regions, until it really started that was. Her vagina started to convulse, her walls pumping hard, she didnt know what was happening. She felt a large tearing inside herself as her vagina struggled to become larger, with every convulsion it grew deeper. Dark black hair started to erupt from her skin and elongate, even though it was encumbered by dried on cum. Her chest started to expand, the bones in her chest pushing her breasts outwards. Even through the shock she felt the tremendous pain in her vagina. Her nipples, unknown to her had turned a dark black color and the aureola had swollen to several times their original size. The pain in her crotch began to feel better and gave way to a tickling sensation. It felt like somebody was brushing her with a duster. Soon the tickling lead to heat, then heat on heat. She felt like she was on fire...on the inside. She moaned, unable to bring herself to sit up. Fur started to spread from her crotch, light brown fur. The fur was pushing up with the heat, all encompassing heat. A sudden rush of blood came from her heart. She gasped, grabbing the carpet with her hands. Her breasts began pushing out into her blouse.

To be continued...