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It would have been wiser for Samuel to figure out exactly what had happened to him at the holiday party before heading home, but caution was thrown to the wind so rapidly that it was utterly shredded in the process.

After all, having that much fun couldn't possibly be wrong. It didn't matter that Samuel would never be able to explain to his family and friends how he'd become an upright canine, much less a 'he' in the first place...but he didn't have concern for answering those questions, as much as he had a desire to enjoy the change for as long as it would last.

The party ended in a rapid and unorganized panic, after Samuel and his fellow canines ended up wrecking the fancy spread with an unexpected romp. Long after the rest of the guests fled the scene, they were still tied together on the floor of the kitchen, with a flood of cum still to be poured into the bitch who'd roped him into everything in the first place.

Now, Samuel was wandering home in the cold, unwelcoming darkness of the evening, navigating the neighborhood almost entirely by scent.

He'd never be able to find his way back to his own house, but there was a safe place closer by, and an unsuspecting person came to a strange noise at their front door, as if claws were raking down the front of the lumber and scraping at the paint.

Krios jumped from the seat of his computer chair and reached for a blunt object on his desk. Late night visitors were a rarity in the quiet neighborhood that he called home, and even if there was family or friends over, they would have knocked, rather than scraping at the door like the hooked hand of a horror movie stereotype.

"...Who the hell c-c-could be here at this hour?" his lower lip was trembling and his throat was dry as he poked a finger through his blackout curtains and glanced down at the front porch. The growth of tree branches kept him from getting a good look at whoever was causing the noise, but he was sure that he saw canine ears and fur when he checked, and didn't see any people around. "A dog? Don't tell me someone just left a stray on my front porch..."

Krios had a soft spot for all things covered in fur, but even he was finding it a strain to get up from his desk. He'd been working into the late hours of the night, and didn't come close to realizing just how late it really was until he was shaken from his work by the canine on his porch.

He wasn't going to leave the poor creature out in the snow, though.

"Alright, alright! Quit ripping up the door; I'm coming!" he yelled down the stairs, his voice carrying on ahead of him as he stepped from the foyer to the front door. "Sheesh...you just got here, pup! You're acting like you've been out there for hours!"

All of his frustration about having to fix his door melted away when he swung it open and a tall, handsome canine bolted through and pounced him to the ground.

"H-hey! Easy on the slobber!" Krios giggled and tried to keep the canine from slurping over every inch of his face, all in vain. "I'm happy to have the company, too, but we just met! At least get my number or something, first!"

Thinking that the dog was just a larger breed, Krios didn't put any stock into the fact that it was even larger than he was, in height, and in weight. Though he likely could have wrestled his way free, the creature was pinning him with paws that looked suspiciously like hands, and in the pits of mostly canine orbs, there was a human intelligence just waiting to be inquired upon.

Samuel took the initiative, instead. "Good evening, brother."

Krios thought he knew panic when he heard a stranger ripping at his front door.

That sensation couldn't hold water next to the voice that crossed his ears, speaking with a tone that was decidedly male, and yet, felt so familiar that he was inclined to believe the mysterious hybrid of canine features on a human body.

"D...did you just talk, boy?"

"I'm Samuel; not boy," the canine replied. "And of course I did! It's not like my body changing made me forget how to speak English or something."

Samuel?_Krios thought. He began scratching at the side of his face, both with inquisitive thought and frustration at an itch that had formed. _And they called me brother...and knew where I lived...holy shit.

" Samantha?!"

"No? But yes? I mean...not anymore? It's a long story," Samuel wouldn't have been able to explain it properly, even if he were so inclined to. "But that's not important right now! What's important is that there's only a few more hours before the sun comes up, and we need to have fun!"

A battle was raging between the human logic that Samantha left behind, and the canine passion for life that Samuel brought to the table. Krios could see it plain as day, even if Samuel himself wasn't able to recognize it so easily.

"Yeah, I...I don't think that _fun_is what we should be worried about right now," Krios disagreed. He continued scratching at his cheek, growing truly frustrated with how deep the itch was. "We need to worry about getting you to a hospital, and finding you a place to sleep...I think I might be allergic to you."

"Oh, those aren't allergies. You're turning into a dog."

" Ha ha, very funny," Krios would be biting back on his sarcasm only moments later as he pulled his fingers away, only to see warm, orange fur stuck under his nails. "Saman- I mean Samuel, you need to start giving me some answers about this right now."

Samuel cocked his head to the side, his soft, black ears flopping as he did. "Why are you so concerned about getting answers? I already told you I don't have any!"

It was hard to be angry at someone so cute, but that didn't overrule the panic that was spreading across Krios' body as rapidly as fur was popping up from his skin in thick, pliable tufts. "You've got to know s-something about this! It happened to you, first!"

"Oh! Well, some girl at a party licked my face, and now I'm a dog!" Samuel was painfully single-minded and straightforward in his approach. "And then we fucked...a lot. And I just licked your face!"

The story was so simple that Krios didn't bother asking Samuel to fill in any of the gaps or finer details. He was busy trying to figure out any method to slow down the change, but his arms were already almost entirely covered with an overcoat of soft orange fur, and a strip of cream that matched the fur that engulfed his navel.

It was hard to imagine what kind of insane party his sister went to, but Krios was going to get a firsthand experience of what she'd been through before; greater changes were happening under the guise of the growing fur, and in the pit of his stomach, Krios could feel it starting.

From just behind the soft, stretchy flesh upon his sack, the pinned male could feel something shifting around, and the moment that it began forming, Samuel took notice of it and looked down at his mostly human brother with a different gleam in his eyes.

"You...smell really nice, Krios."

It was a statement that Krios never could have prepared for, and didn't want to hear from his own sister, or in this case, his new brother. "Okay; that is seriously not helping to make this any better, Samuel!"

"It's just a compliment," Samuel claimed, though the way his tongue fell easily past his fangs and brushed across Krios' neck was a step beyond complimentary. "Why are you so tense, anyway? I said we were gonna have fun!"

The thought never occurred to Krios before that moment, but the obviously corrupted mind of his brother's new form was intent on getting one thing out of the encounter.

I'm your fucking brother, Samuel. What on earth happened to you?

It was a chaste thought, and one of the last such thoughts Krios would be able to manage as a shock ran down his spine, all the way over his rump, and to the new separation of flesh between the back of his legs.

That can't be what I think it is.

Bones were starting to shift in the pinned brother's face as Samuel hurried the process along with more of his tainted saliva. With each lick, the changes became more intense, forcing Krios to wince in discomfort as his face elongated away from itself, carrying his nose and lips out to the end of a rapidly changing muzzle.

To call it panic-inducing would have been an understatement, but Krios had given up on finding a way to stop the process.

"What...kind of fun were you thinking of, Samuel?" Krios did his best to speak with the lips that weren't quite adjusted to moving upon a longer face just yet, and his words came out sloppy as Samuel went about his business, slurping his tongue further and further down along Krios' neck, until he reached the edge of his collarbone.

Where there should have been flat, firm pecs, bumps were starting to grow and press against the edge of his shirt, but Krios thought it was nothing more than clumped up fur, still getting ready to smooth out.

Samuel knew better, and eagerly moved his paws from his brother's shoulders to his chest.

It only took one squeeze to confirm Krios' suspicions, and he cried out with unexpected delight as he experienced the first pleasure of having his budding breasts fondled so playfully.

"S...Samuel, this was not part of the plan!"

"I wouldn't know what the plan is," Samuel admitted. "I'm just doing what feels natural, and I can smell a bitch beneath me...a needy one, at that."

I'm not...no...

Krios was still sporting a dick, but there was obvious moisture coming from the separation that formed behind his sack, in addition to the already impressive bust that had formed upon his chest. Two breasts would have been enough, but proper canine anatomy wouldn't allow Krios to fall short of the extra rows of nipples that were starting to pop up along his slim, narrowed torso.

He wasn't just a perfect blend of human and canine anatomy, but of male and female, as well, making him the ultimate plaything for Samuel to take out his sexual frustrations on.

"Samuel...we can't."

The words were every bit as weak as they were empty. Krios' throat was dry, his voice unable to muster the kind of rejection that he should have offered to his lustful brother.

Resistance was melting away with every pulse of the transformation through Krios' body, until words of denial were every bit as meaningless as they felt.

"I hope you don't honestly think that," Samuel replied. "I'm pretty sure you're adequately equipped for this now, bro."

There was a lack of tact in the voice of the first one to be transformed, as if canine mannerisms made Samuel aloof in his linguistic nature.

It was enough to draw a giggle from Krios; she couldn't help finding it cute.

"I'm pretty sure you mean 'little sis,' don't you?"

Samuel should have been floored by the transformation that had taken place in front of him, but part of him believed that he was just seeing Krios in her real body for the first time.

The canine aspect of his brain was just happy to see and smell the needy bitch he'd been looking for.

"Guess you're right. There's nothing masculine about you anymore, is there?" Samuel asked, surveying the tatters of clothes that were left behind by Krios ripping out of her outfit, in no small part due to the thick tufts of fur that had stretched fabric well past the normal limits. "Not that I'm gonna complain about that."

Samuel wasn't aware that he was wrong in that assumption. Though it was retreating into the warm captivity of a full, fuzzy sheath, Krios was still outfitted with both sets of genitals, even if there was only one on Samuel's mind.

He couldn't have guessed what she was planning to do with the hidden length; his mind was between her thighs, and his body would be only moments later.

"Nothing that I can see," Krios replied. "But there's something you should definitely feel if you're still concerned."

Were he entirely human, Samuel would have been surprised to see how quickly Krios was coming around to the idea.

His blended mind was less concerned with her expeditious lust, and more concerned with getting her into a proper position to mate.

"...Get on your knees, Krios."

"Kleo," she replied, even as she rolled over onto her hip, before her short, curled tail began wagging with enticing delight to her brother. "It sounds...fitting."

Her choice of words was no mistake. The blend of a slender human and a full, powerful Akita breed, Kleo was retaining more of her human personality than Samuel was, and easily could have pressed her palms and knees into the floor faster than she was.

She knew that dragging out the chase would still appeal to some part of his mind, and the sight of his cock jumping free from his sheath and throbbing at the air as he knelt behind her was all the confirmation that she needed, but it was far less than she wanted.

She was lucky to have a brother who was so eager to meet her needs.

"I like it," Samuel was more simplistic in his reply. The wild beast within was truly winning the battle with his consciousness, even though his physical form was still such a careful blend of the two bodies. "And I like you , Kleo."

She giggled as she looked back around her shoulder, her hips still wiggling from side to side in a classic move of enticement. "I like you too, big brother. Why don't you show me how you feel instead of just talking about it?"

Samuel didn't need the extra incentive or teasing glances. His mind was already on a singular track and his body was starting to follow as an impressive volume of precum spat at the floor, flinging from the tip of his throbbing cock.

The heat of the mess landed just between Kleo's knees, making her whimper with frustration; every second was an eternity unto itself in the moments of anticipation before the storm.

"If...if you're sure," Samuel was the one hesitating at the moment of truth after his aggressive approach, but it wasn't the bashful nature that Kleo suspected.

He was just carefully lining up his shot before taking it.

"Should I lift my tail a little higher for you? I don't if I c...c-can...yeeees..." Kleo fought with desperate moans as her brother lunged forward unexpectedly, taking the time to aim his length before plunging it forth instead of blindly stabbing like a canine was wont to do. "Took you l-long enough, big brother!"

The sensuality of anticipation would be lost on Samuel in his current state, but the remnants of the more feminine mind he once held knew the value of building up the main event. Kleo was dripping with lust, and it coated Samuel's member as it easily passed through her transformed folds and filled her inner muscles.

Inexperienced, Kleo was guided purely by instinct as she held still for her brother and raked her claws against the floor.

"I hope that's not a complaint I hear?" Samuel asked as he scooched forward on his knees, until he was forced to prop his stance up on his hind legs. Their bodies were so perfectly aligned in their transformed state that the new angle gave Samuel an extra inch of depth, and his arms quickly locked in around her hips, but only settled there for a moment. "If it is...I can always pull out."

It was brave talk; Samuel couldn't possibly back out without a climax anymore, but Kleo met it with reckless desperation all the same as she pressed her breasts into the floor, forsaking their comfort to throw her arms back and grab his own.

His paws were already sliding up her torso and ruffling her fur, en route to cupping her chest and squeezing each full, delicious bump with carnal hunger.

"D-don't...don't you dare!" Kleo demanded, her expression dipping away from the silly bliss that was painted across it, even if it was only for a moment. "Keep that cock inside...keep it in until you k-knot me, big brother!"

Kleo was quick to catch on to the changes in their bodies. She couldn't have known that Samuel was sporting the usual bulge of flesh at the base of his length, but the rest of his shaft was tapered so fittingly for her hybrid of canine and human anatomy, leaving her to cry out her need for it, even if that need wasn't to be met.

She was in luck that their transformations were so complete.

"Everyone is so eager to get my pups inside them," Samuel murmured, his voice curious and his mind spacey as he revealed his previous activities that evening. "Even my own little s-sis...wants a tummy full of them!"

The frustration and eager lust on her face mingled into a sultry gaze as Kleo looked back at her sibling. "Damn right I do...f-fucking do it, already!"

Holding tightly to the full, swollen breasts upon her chest, Samuel pumped deep from the hips and completely filled out his transformed sibling, his every inch of flesh spreading her deflowered folds apart and leaving them to stretch even further as the bump of his knot began emerging from his sheath.

What started as an unwelcome and unexpected visit was turning out to be the night of Kleo's life, and her muzzle spread wide open to declare it as she felt her brother's knot ease into her womanhood with a subtle pop.

"Yes...Samuel, yes! I feel it...all that t-tasty fucking cum rushing in!"

Her insides were already drowning in the flood of a proper, canine yield, the volume spraying across every inch of her vaginal cavity while the luckiest mess poured into her womb. As if to simulate how she felt inside, Kleo melted down to the floor, her tongue slipped from the side of her muzzle and drooling on the floor as she collapsed under her brother, still tied to his crotch.

Samuel moved on instinct own his own end, his hips driving with furious speed as orgasm wracked his body and forced his fangs to clench tight together. His claws couldn't help raking the tender flesh of his sister's bosom as release took control of his form, but the tiny hint of pain was worth every wave of pleasure that rolled over her body, as her panting brother slumped over her lower back.

She had just enough effort about her to lean up and slurp affectionately over his nose, her muzzle painted with an eager, genuine smile and her tummy bulging just the slightest with the yield of brother's affection.

His paw was rubbing against it delicately as they slowly gave in to a pleasant exhaustion.

**