*Note, while the picture contains no adult themes, the story below however, does, please use discretion when viewing!

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Borgo knew he was adopted, there was no if ands or buts about the fact. His father, a hulking, brawny silver back gorilla, was easily pegged as his foster father, Borgo being a German shepherd and all. It wasn’t something the two had ever spoken of formally, between them however was a silent understanding and thereby, there was no real need to discuss it any further.

Borgo didn’t adore him any less than a real son however, given to the fact the big gorilla, however gruff and bestial his appearance, was as warm, gentle and loving as any father should be. There was only one thing that Borgos father detested about his son however, and that was his somewhat bizarre habit of getting into the gorillas underwear drawer, and trying various articles within it on.

Now, the muscular gorilla Grogan could hardly blame his adopted son for his fascination with his under things. It was true; the gorilla favored more sensual, stimulating and attractive undergarments, by way of bikinis, string bikinis and even speedos now and again, Ranging in every solid color and combination of hues imaginable. But even so, he tired of finding them missing, and even catching Borgo in them now and again on several occasions.

“Son!” The huge gorilla had said gruffly “It’s perfectly normal for you to be into these sorts of things, however, you need to get your own. You’ve your own job, in your 20’s, and it’s not normal for you to keep doing this!”

Much as he always had when his father had caught him red handed, and reprimanded him for his actions, Borgo would feign a guilty look. Giving the big gorilla those wide puppy-dog eyes, that always seemed to sedate his temperament.

“I’m sorry Dad, won’t happen again.” He’d say, much as he’d said a million times before, and that would be the end of it.

At least for a day or so.

Soon however, Borgo would be rummaging through the drawers again, donning a pair and strutting around much like his father did. For as much as Grogan tried to stomp out Borgos odd urges, the gorilla didn’t help much by regularly tromping about the house in nothing but his underwear.

“Son! I mean it this time!” Grogan had snarled feral, hackles upon his sinewy neck raised in frustration. Very rarely did the gorilla get this enraged, but for once he caught his adopted son wearing something he really didn’t want him too. It was leopard print loincloth with a bright neon green bikini which he wore as a costume for his part-time job as a circus strongman.

“I catch you in my things one more time, there will be dire consequences! These briefs and other things are for daddy gorillas only, and not for young whelps!”

Hurt as well as frightened by his fathers tone and frustrated features, Borgo nodded obediently with a truly apologetic expression. Consolingly Gorgan had embraced him afterwards, apologizing for his own mistakes and explaining his anger better. Both at ease again, that seemed the end of the outlandish behavior on the German shepherds behalf.

But only for a few weeks.

Borgo, for all his efforts to behave, and heed his fathers warnings of a reckoning should he put on his bikini briefs again, soon gave into his unrelenting urges. Especially fascinated he was with the loincloth attached to the neon green bikini, why had it upset his father so for him to have worn it? It was easily the most alluring and arousing of his fathers briefs, with its spandex bikini, slinky lointcloth, and a leather black belt that attached it to his waist.

He couldn’t resist it…going for as long as he had without wearing it had been agony.

When he believed his father gone, Borgo crept into his bedroom, as he had so many times before, and went straight for his dads large black oak drawers. But as it happened, instead of the brief being in the top drawer, Borgo spotted the loincloth/brief folded neatly upon his dads bed. Momentarily stunned, given the fact his dad rarely did things like this, Borgo was at first, hesitant to go over and put it on. But any reluctance he might’ve had quickly vanished the longer he looked upon the brief, and soon was unable to resist any longer.

Quietly the German shepherd tiptoed over to the brief, taking off his own loose fitting shorts and boxers, and slipping the slinky spandex bikini on afterwards. A somewhat exhilarating sensation exploded into his loins the moment the Lycra slid over them, the bikini was still slightly warm, as if the big gorilla who normally wore it had just taken it off only minutes before. Borgo was instantly hard at the thought, grunting softly as he ran a paw along the outline of his swollen shaft through the loincloth that hung over it. The feeling of Lycra slipping upon Lycra through his paw fingers was intoxicating, and Borgo could barely contain a moan of excitement in response to it.

Normally, when Borgo put on one of the big gorillas briefs, he’d pose in it for awhile, perhaps wear it beneath his clothes for a few hours, just for the thrill of it. But this time he felt especially aroused, the need to paw at himself almost unbearable, a sensation he just couldn’t ignore. He didn’t want to risk being caught like this, but the German shepherd couldn’t help climbing upon his dads bed upon his stomach. Paw to his groin, he began grinding into it, grunting and huffing deeply, unknowing as to why he felt so strongly aroused, but not really caring either, as it felt so wonderful.

His dads bed, covered with a soft black down nylon comforter, was even more stimulating. The sleek, shiny and satiny material beneath him cushioned the front of his body, rustling almost hypnotically.

“Feels so good…”Borgo moaned, as if in a trance, as he continued to feel himself through the clingy fabric rubbing up between his paw and privates.

So consumed by the thrilling sensations occurring all over his body, he didn’t even notice the peculiar changes that began to occur all over him. It started with his footpaws, slowly, gradually changing color from tan to a darker, more grayish hue. The same thing occurred to his front paws, so diligently massaging and kneading his bulge Borgo was none the wiser to their strange new tone. His body fur too began to change, darkening, his fur lengthening upon his arms and legs. His once lithe and somewhat lanky body, became slightly more defined, taking on a more swimmers build appearance then it had before.

Borgo could’ve gone on entirely unaware of what was slowly happening to his body, were it not for the fact of the sudden swelling of his stomach, pushing itself into his forearm.

“W-what…?” Borgo pushed himself up suddenly with both arms, only to cry out in alarm at what he saw. His fur, still darkening, had taken on a more grayish hue, and his fingers and toes were elongating more noticeably then before. “What is this!”

In shock, Borgo leapt from the bed, only to stagger upon legs that were twice the width they had been before. Unused to such muscular brawn, both his arms and legs felt awkward and heavy, and unable to curl his mind around the sudden changes, the hapless German shepherd fell back upon the bed.
Again Borgo tried to stand as a sudden panic overtook him, and he rushed over to the tall mirror in his father’s bedroom he so often posed before. What he saw, staring back at him made him cry out in shock. Beside the changes occurring to his arms legs, paws and feet, his face was transforming as well. His nostrils, once miniscule were suddenly widened holes, his skull taking on a more simian appearance as his head lengthened. Further still, the soft fur that once lined his features was slowly dissipating, becoming grey, and more leathery looking.

“Oh my god!” Borgo screamed, throwing his much brawnier and hairier arms above his head and screaming in terror. Unable to do anything but watch as the changes took place, Borgo began to weep in utter despair, unknowing what was happening what he could do to stop it, he was truly and utterly frightened.

“Oot, Oot…dad, help!” Hunched over slightly, and speaking in a deeper bass rumble the powerless Borgo started to beat his chest in frustration. No longer resembling anything of a German shepherd, he was now a fully-fledged hulking grey gorilla.

Grunting and moaning to himself, Borgo felt his once capable mind slipping away from him, more primitive and savage thoughts taking hold. “Wut…Ookhruk…wut happen to me?”

There was no answer to the question, but Borgo could hear the approach of someone to the room, his leathery brow furrowing anxiously. Suddenly feeling very tired, the big ape climbed back into his dads bed, rumbling deeply. Sinking into the soft downy nylon covers, Borgo soon found himself drifting fast asleep, entirely unaware to when his dad entered the room.

“I told you there’d be consequences, boy.” The big gorilla growled.

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Another picture to have taken ages...probably because I spent too much time procrastinating on it. Something I've wanted to do for awhile is a gorilla transformation, and I finally got around to it. Was a bit of a pain to get the scales right but all in all, I was happy with what came out of it.