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Another step, another breath, another bead of spittle rolling down from his tongue as he panted: Achan was putting in as much effort as he could, but some part of him knew that the morning runs were only effective at keeping his waistline trim.

There was only so much a musclebound werewolf could do to slim up in the first place, but Achan wasn't running through the woods for the sake of his sculpted stomach.

It was all a vain attempt to burn off enough energy to contain himself; taking a moment on the front porch of the small cabin and watching the sunrise finally catch up to him, he knew that he hadn't burned through enough intensity to keep his paws to himself when he opened the door.

She knows that she needs to wear something under the apron, right?

Achan closed the door behind him with impressive restraint: every gentle thing he did became noteworthy, thanks to the sheer size and power in his upper body.

It wasn't a quiet enough gesture to keep Adina from realizing he'd come in the front door, but she was anticipating his company...and the subtle lift in her already curled tail was no coincidence.

"That was your longest run since we came to this place. You think it's starting to help at all?" she asked, tending to a skillet. A full pound of bacon was cooking in its own grease and filling the quaint cabin with the heavy, salty aroma of a fulfilling breakfast, and in that same boiling fat, a pair of eggs were turning from translucent puddles to perfectly soft rounds of white.

The scent and sight of the food coming together was _almost_enough to keep Achan's thoughts from the sight of his sister's backside, but she knew exactly what she was doing: the entire trip to the cabin was her idea, after all, as she hoped that getting away from everything and getting back to nature might help the transformed werewolf to learn a little self-restraint.

Meditation and exercise were doing wonders for his control, but she hadn't been pushing the envelope at all, until that day...and she ripped the seal apart with the slight bend in her hips and the lowered tug of her apron, allowing her cleavage to spill over as she turned to face her brother.

"I feel like there's nothing I can do to exhaust this body...but I am a bit hungrier than anything else," he confessed. "Not that trading one addiction for the other solves either problem, but if I'm gonna work out three or four times a day to keep from jumping your bones, I might as well be eating my fill while I'm at it."

The transformation was the cause for his spike in libido, and Adina took it to heart that all of this was at least partly her fault, but she had two bad feelings about the situation when her brother returned from his run.

The first was obvious enough: that he would have spent all morning running around the forest, only to feel as much arousal as he had when he woke up, that day.

The second was at her own behest, as she realized that she was part of the problem...much as she convinced herself that the lack of clothing was a test for his level of restraint, she silently wanted him to fail, instead of leaving her to tend to her own arousal while their breakfast settled.

"I didn't mind fronting the rent for this place since it was my idea, but if you keep eating like this, I'm gonna put you in charge of the food bill," her warning came as a tease, but even a playful wink from the red husky was a bit more than Achan could handle, especially when she bounced in place and turned back to the skillet.

The heave of her breasts captured his attention and left his shorts a step beyond the unbearably tight nature they already held; clothes for werewolves weren't a hot commodity in the town where they lived, and shirts that would actually fit Achan's new, expanded frame were out of the question.

His body was silently begging to be let free from the fabric of those gym shorts, and the delicate pheromones of his aroma were still sharp enough to pierce the scent of roasting meat and tickle Adina's nose, until she was actively fighting the urge to lean over the stove and present herself.

In the same turn, the werewolf couldn't ignore the presence of her bouquet...and what started as a subtle, enticing tickle under his nostrils was becoming overwhelming as he watched her work.

Need to do something... anything...the hell can I do to help? He wondered, and looking around, he saw that the coffee was already brewed, the table was already set, and the last element, the bread, didn't make sense to toast before the rest of the food was ready.

"Anything, uh...a-anything I can do to help?" Achan shifted the topic just to take his mind off the flirty wink his sister offered him, but her tail refused to settle, and her body was displaying the same lack of restraint that he was working to control. "Nothing else needs to be cooked?"

"All you need to do is take a seat at the table and recover from your run," Adina suggested. "As long as you were gone, I can't even imagine how far you went."

Such long, powerful legs and an indomitable spirit had turned the once modest and meager Achan into a force to be reckoned with, and that extended beyond what he could do in a weight room, when he had the chance.

10 miles went by so quickly that he didn't have a clue how far he'd actually gone when he returned; he ran using things that he saw in the woods as markers, and at each one, his mind drifted to how he and Adina might take advantage of the space, knowing that no one would happen upon them in such thick, overgrown wilderness.

Kinda defeats the purpose of meditating like I have been,_he thought. _But I swear, I'm trying the best that I can!

If he were alone in the cabin, it might have been easier to make strides toward that elusive self-control, but due to her own guilt and involvement in the transformation, Adina felt some sense of obligation to spend the time with Achan, hoping she might help him to get better.

After a week, it was hard to tell if her presence was keeping him on the level, or if she was just as guilty of giving into her urges as he was into his own uncontrollable lust.

"It was...w-well, I gotta be honest...I have no idea," Achan admitted, chuckling. "I just went out to a pond that I've seen a couple times and curled...I...I mean...looped back around from there."

She could feel the weight of his stare on her tail and her backside, even before his words gave such an obvious slip.

Knowing that she was proving too much for him, even after such an exhausting run through the woods, did too much for her ego...and absolutely nothing for her sense of modesty.

"You know that your eyes are too intense anymore, right?" she asked, giggling. "I know exactly what you meant to say, and yes, I already know what you're looking at...guess I should be flattered that you could be so hungry and still want to eat me more than you want to eat a full pan of bacon."

She picked her words carefully, wondering if she might be immediately lifted from the floor and consumed by her brother...and if they took that plunge again, there would be no sense of the word left undiscovered.

Upon arrival at the cabin, the pair began a small marathon session, but thereafter, Adina changed her tune and ordered Achan into the difficult regimen of meditation and exercise that seemed to be working.

"Pretty sure my stomach can wait," Achan suggested. "It's been rumbling all morning, already...what's another hour gonna do?"

"Another hour?!"

Even though she'd experienced his new, impressive stamina a few times already, hearing the realistic scope of it out loud was thrilling in its own way, even if her logical mind struggled to believe that he could go that long without taking a break.

Her passionate mind, on the other hand, just needed a reminder of what he was really capable of. It was pushing guilt to the side, if only for the duration of the romp, to keep her from giving anything less than her all to the beast that was sizing her up...and it shared a visible inkling of the same as a single, glistening bead of arousal gathered at her narrow petals.

"Yeah...should probably be enough to get me warmed up, at least."

This was exactly what she thought she wanted when she made the tiny adjustment to his workout shake and caused him to transform in the first place, but Adina didn't think she'd end up going back to her brother for seconds and thirds, much less that she'd end up losing count of the times they'd crossed the line into taboo.

Feeling the weight of his knees against the floor before she felt the press of his tongue against her petals, she already knew what was coming...but that knowledge wasn't such that it dulled the sensations of her bliss as he lapped up that first drop of arousal with ease, leaving a trail of his own spittle in its place.

"I'm starting to think y-you...you might not be trying as hard as y-you could be," Adina murmured, keeping such a tight grip on the skillet that she nearly pulled the cast iron into herself. Digits were curling of their own volition as she did all she could not to lean forward and invite a fuller taste, but the curl of her toes into the floorboards told the tale of her conflicted emotions. "That maybe you think this cabin in the wood is j-just a pleasure cruise, for us..."

His paws were just cupping her rump and spreading the cheeks when the words reached him: he kept her flesh in his grasp, but his tongue hesitated.

"Says the girl that had her tail lifted, her hips bent, and her legs spread just a little bit when I came in the door?"

"Yes, that girl," Adina confirmed. "The one who's trying to test you and see if you've learned anything about controlling your urges."

"Maybe start with a pair of shorts under the apron, at least?" Achan suggested, knowing that she was just as eager for him to keep going as he was to take another taste...but until she confessed her role in everything, he'd find a way to keep himself restrained. "I'm not sure I can convey how hard it is to keep from acting on these feelings when I see... that."

His eyes were peering into the subtle pout of her folds, watching the warm, pink flesh entice him with a greater volume of her glistening arousal.

"And the whole reason for us renting this cabin and getting away from it all was so you could learn some restraint. Not like we can go back to regular society until you do."

"And you still haven't found a cure for this thing that you did to me?"

"Working on it."

"Then I guess we're gonna be out here a while," Achan conceded and pressed his lips into her mound, letting her feel the heat of his panting, eager breath right against her most tender flesh. "Might as well make the most of it...since that's what you wanted me to do, anyway."

Adina's motivations were a seesaw of moral ambiguity: she'd wanted to help him with his workouts, but when she saw what he'd become and how he reacted to her, she couldn't keep herself from enjoying the unintentional benefits.

As it followed, when she rented the cabin for them to work on his new body and overwhelming instincts, she couldn't keep herself from reaping the further benefits of the first day or two of privacy, but now, she was wondering how much of her efforts were sincere, if any of them were.

"And...if...t-that's exactly what I w-wanted?" she asked, trying to leave even a hint of possibility on the end of her question.

Her brother saw through it all from the very beginning: she knew him well enough to know that he hadn't learned that kind of control over his new body by then.

Nothing short of working himself into unconsciousness would have been enough to keep him from seeing an opportunity in the kitchen, much less taking it into his own paws and spreading her thighs a little wider.

At the heat of his paws, the eager grip in his fingertips, the overwhelming strength in his hold...she simply melted, helpless to do anything but shift her grip to the edge of the counter and pray that the massive werewolf would have mercy on her for toying with his emotions and lust.

"Then you should have just said so and saved me the run this morning," Achan recommended. "You, uhm...y-you know how to sew, right?"

"Achan, don't you fuc-

Riiiiiiip.

His claws were sharp enough when he was still a husky, and anywhere close to his sister's smaller frame.

As a full, massive werewolf, a single claw would have been enough to make quick work of his shorts, but the dramatic effect of using every claw to utterly mince the garment was a better way to get his point across.

It wasn't enough to silence her; that was all due to the eager press of his tongue, moving past her dripping folds and penetrating her with a deep, fulfilling thrust that could put plenty of cocks to shame.

"...ing...d-dare..."

She wasn't sure how she held onto that thought, but she wasn't able to cling to her sense of disappointment when she could feel her stresses melting away before they had a chance to take root.

Though she didn't know it, her brother's tongue was plenty skilled before she changed him into a massive beast, and the combination of size and skill left him able to silence her frustrations; it couldn't keep other sounds from escaping her lips, but he was just as happy to hear the slick, internal clench of her muscles around the organ as she sucked in a breath, fighting back on the words that he needed to hear.

If I don't say it, maybe he'll be able to stop himself, she theorized. If I don't tell him to breed me like a stupid, eager bitch, maybe we can just stop at this...?

She couldn't help but feel like she was forgetting something else of dire importance at that moment, but lust was clouding her mind as quickly as it was eliminating any sense of proper judgment; nothing could be as important as letting her brother ravage her.

Trembling knees and slipping paws were struggling to keep her upright, and the shift of her weight against her brother's tongue were rushing her right along to an orgasm. She wasn't foolish enough to think that she'd be satisfied with just one, and she knew better than to pretend that he'd let her off the hook...but then, he'd pegged her for that from the very start.

She did want him to lose control, just one more time...and every time he did, she'd tell herself the same lie: that this would be the last time they'd let it go this far.

"We both know that's n-not enough for you, Achan..."

He was already losing the struggle with his instincts, grunting in reply to her admission and slurping the juices from the deepest reaches of her passage: when his tongue could reach no further, it eased back and slathered her petals with the mingled heat of his spit and her own arousal, making a terrible mess of her crotch...but one that she wasn't upset with in the least.

Sex with a werewolf, she found, was always a bit of a messy practice.

"Damn it...y-you're...you're really gonna make me say it, aren't you?"

She wasn't sure if it was the departure of his better senses, or a genuine effort on his part to force the words out of her first: he was grinning either way, and the dominant nature he'd taken to was pushing her legs to quiver that much more.

Adina would drop to her knees if he didn't catch her, but if he did, she knew what she was in for.

"Damn you...f-fucking mongrel..." she was whimpering with near-orgasmic delight, but she questioned her own moral compass for trying so hard to point the other direction, this late in the game. "You wanna fuck your own sister; you'd damn well better do it right...put that tongue away and fuck me already!"

Her claws raked over the counter as she nearly lost her stance, but she wasn't worried about the deposit on the cabin, or the damage they'd do before the end of the day: she wanted the fullest experience Achan could give her, and thick, eager growl tickled the back of her ear as he sprang up and wrapped his arms around her, pushing his cock against the small of her back.

At just over five feet, Adina was smaller to begin with, but her brother stood a full three feet over her, with a member that was already spitting precum onto her shoulders; she'd be walking funny all day if he went at her with unbridled intensity, and after such a lengthy tease, she knew he didn't have the willpower to avoid doing exactly that.

"First your shorts," she whispered, as she was turned from the counter and pinned on the table, the sway of her breasts knocking silverware to the floor with an errant clatter. "And now the f-fucking dishes...maybe just once, you could fuck me without wrecking the place...?"

Achan gave her a brief idea of just how far gone he was when he gripped the base of her tail and yanked it hard , revealing both of her holes in a single tug and only providing her an ounce of relief when he picked the right one: a tapered tip eased through delicate petals and spread them wider and wider as his sheer size pinned her in place.

In the midst of such a brutal push, there was just enough cognition for him to grin and remind her of one thing: "You love it when I wreck the place first...and we both know it."

Ears folded back, pretending not to hear those damning, confident words, but it was already too late: Achan had his sister all figured out, from the way that she liked to be taken to the unbridled passion that she wanted him to exhibit.

She never would have thought that the incestuous connection would become an afterthought, but it was still present enough to have an effect: knowing that it was still Achan, even after his transformation, added a final, sinful element of sensuality to the act that pushed her into an orgasm...

...Right as he was starting to thrust with any sincerity.

"Damn...d-do you keep getting bigger e-every fucking time?" she looked back over her shoulder, eyes riddled with desperation and disbelief at how much flesh he could offer her with a single pass. "Stupid fucking wolf...y-you're gonna ruin me!"

Achan snickered as he released her tail, finding the grip of her hips gave him better purchase to pick up his pace and lend her his weight like a genuine canine. "You're welcome," was his only offered reply, that voice coming with such a thick growl that flattened ears couldn't resist the vibrations.

Tiny and quick as it was, there was no denying the squirted streak of feminine ejaculate that leapt from Adina's body as she gripped the tablecloth in one instant, tore it in the next, and finally, she pushed herself back on Achan's length the best she could.

Against a werewolf with solid ground and eager legs, she couldn't come anywhere close to his pace, but she could wear a stupefied grin and lean into the table as he put the quality of the craftsmanship to a very unexpected test.

"That's it? That's r-really all you've got?" Adina had already dug out her own grave, and now, she was willfully falling into it as she felt the table trembling beneath her, and heard the sound of hips crashing into her full, supple backside, but she couldn't control that flirtatious part of her personality, even then.

As much as this was a trip to help Achan control his new form, she realized that she had a few things left to learn about restraint, and with her brother around to breed her at the drop of a hat, she wasn't going to learn anything anytime soon.

"In case that huge cock is s-shrinking your brain, I was asking you to g-go harder ," she said, offering one last taunt to a beast that already had her trapped in a compromised position.

She wasn't at all upset by that turn of events, but she was on her way to a second orgasm and feeling the demands of the same as the weight of her brother's knot kissed and teased her already stretching petals.

"If you keep this up..."

His voice was so thick with a growl that Adina could hardly understand his warning.

"I'm gonna spend this whole fucking day breeding you...pounding your tight, little pussy in every room of this fucking cabin...until you can't think, can't walk, can't breathe..."

Those words took her pleasure to new heights, and with the slip of his knot past her last line of resistance, she broke into orbits of bliss that she never imagined possible.

Her mind was blank as she felt his seed pumping into her womanhood, flooding her womb with such a volume that she could feel that bulging weight at the front of her stomach, settled against the table...

**

Cum was still leaking from Adina's womanhood when Achan finally shrunk down enough to ease his knot from the well-fucked muscles of her passage, but with the size of his orbs and the volume he could produce, she wasn't going to bother putting panties back on; she'd be changing them every few minutes.

She was thinking about the apron on her body, however, when she came back down from her otherworldly bliss, and smelled the one thing that was more prominent than the scent of her brother's yield.

"...Uh...y-you like your bacon burned, right?"