One Fantasy For Another

Story by Joshiah on SoFurry

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#57 of Incest Stories (Others)

This story sees a pair of siblings retiring to a cave after a long day of intense training, only to see the sister, Nariya, reveal that she isn't all that tired after all!

It only takes a little urging from her to get her brother, Kel, to engage in one of their other classic traditions. Their world is one free of taboo, meaning that their pairing isn't all that unusual, but she does her best to make things a little different when she starts taunting Kel about who he'd rather be sleeping with.

After a quick transformation, she's in a form he can't resist, but two can play at that game!

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If you like this content, please consider supporting me on Patreon or Ko-Fi! https://www.patreon.com/Joshiah and ko-fi.com/joshiah

As always, read, comment and enjoy!


The cave felt somewhat empty with only the crackle of logs as fire consumed them, and the shared warmth of a pair of cuddling bodies to fill it, but privacy was desperately appreciated by the couple that were waiting inside.

Two young tricksters were spent, not physically, but mentally. A long day of training in the mystic arts made for easy sleep for one half of the coyote pair, but not for the other, as she curled up into the arms of the man she was training.

"Come on...stay up and talk to me just a little while longer?" she asked, her ears folding back in obvious disappointment. "I'm not tired enough to fall asleep yet..."

"How are you not? The last time I performed that many transformation spells in a day, I passed out in the middle of the field. They had to drag my ass back to the cave," he protested, even as she burrowed further into his side and nuzzled her forehead into his shoulder.

"I basically dragged you here in the first place," she claimed. "Seems you've never got time for your little sister anymore, even when she's the one showing you the ropes."

Nature was full of creatures that could play a trick on the mind with a toxin, a spell or even a clever riddle, but coyotes had a reputation for being the biggest tricksters of all. Cunning and devious, plenty of younglings were cautioned against ever interacting with a coyote if they could avoid it, but doing that wasn't such an easy task.

When it came to Nariya and Kel, there was an added challenge: They didn't always appear to be the coyotes that they truly were.

"You're just getting me up to speed on the finer details. I'm already so good at this, maybe I should be the one giving you lessons!" he bragged, but for all his bravado, Kel couldn't help stifling a yawn behind his paw as Nariya nipped absently at the fluff upon his shoulder.

She clearly had too much energy to sleep, and even if Kel knew what she was getting at, he wasn't going to make things easy on her. "You're nowhere near my level, big brother. You're lucky I consider your training to be worth my time," she claimed. She gave pause, and a single, crooked snaggletooth dipped from her jowls as she grinned. "But if I was a fennec, like Katiya...maybe you'd think I was worth your time, too."

The walls of taboo didn't exist in the wild, reducing the forbidden act of a brother and sister in naked repose together to little more than playful flirting between single creatures.

That didn't stop Kel from stiffening up as his sister slipped a paw down the front of his torso, digits playfully walking along the lines of his toned abdomen like eager footsteps on a bountiful trail.

"I d-don't know what you're talking about," he tried to lie through his teeth as he sucked in a gasp. A life of training together meant that Nariya knew every one of his most ticklish spots, and she flicked her pawpads back and forth over the middle of his waist like a feather duster, giggling as he wiggled and writhed about helplessly beneath her. "S-she's just a friend, Nariya!"

"A friend that you want to split in half with your cock," Nariya finished the thought for him. "You can't hide the way you look at her from me, you know."

Naked bodies were getting warmer without the help of the dancing flames nearby, and Nariya sped up the process, guiding the flat of her open palm down to the exposed sheath between her brother's thighs. She'd been looking up to him and capturing his gaze, leaving her entirely unprepared for the surprise of his member, tapered and dripping, already emerging from the heated orifice and spilling on the back of her paw.

"I guess you can't hide your excitement, either."

Fooling around was never out of the question when Nariya and Kel were done with a long day of training. That evening, Kel was sure that he'd be too tired to perform, but it only took a single, teasing brush from the fuzz on her knuckles to make his length throb against her wrist.

"You don't know w-what you're talking about," he continued trying to deny it, even as Nariya turned her attention down to the slowly emerging length. "I only like other coyotes."

"I knew that...you've fucked me plenty of times," Nariya reminded him. "But if I was a cute, tiny little fennec, you could watch me struggle to take your cock...so small and _helpless..._what could I do against a brute like you?"

Kel was often aware of how much Nariya pried into his personal affairs, but the extent of her knowledge caught him by surprise every now and again. "This isn't f-fucking fair, Nariya!" he groaned, his body shuddering against the floor of the cave as he felt his sister's paw shifting, even as it began to stroke him.

Her paw was able to comfortably wrap around the girth of his shaft, at first. With just a little focus, however, she was able to shorten the length of her digits, and soften the fur that filled the gaps between them. A quiet hum filled the otherwise silent cave as small particles of energy resonated with the fire, forcing the flames to burn brighter as Nariya tapped into the natural power of the world around her.

Her normally tawny paw turned sandy yellow in the next instant as her entire body began shrinking, save for the already tall, majestic flesh of her ears.

"Part of being a coyote is never playing fair, big brother. If you haven't figured that out yet, maybe you're not taking my lessons seriously enough," Nariya suggested, her brow narrowing as she continued to grin playfully, while showing her disapproval with his sloppy habits. "Judging by the mess you're leaving in my fur, though...it looks like I've finally got your undivided attention!"

Nariya's grin appeared to fade, but it was merely the decline in the size of her muzzle that fooled her brother. Narrower and shorter, her grin was still very present as sandy, light fur spread across her overcoat and surrounded her eyes, filling in from her cheeks and passing up over the tips of her ears, leaving behind only a pair of markings on either side of the bridge of her nose, and tiny droplets in her fur, as if the plush coating were shedding tears.

She was changing rapidly, and her already petite body was shrinking to such a weight that Kel hardly noticed her climbing up into his lap. Already the larger of the two, Kel was starting to feel like a giant as the rapidly shrinking coyote looked up at her brother with an appearance that was more vulpine than anything else, and the shorter length of her soft, puffy tail began to flicker with excitement at what she felt pressing beneath it.

"Still hesitating, Kel?"

Even without societal norms telling him that he shouldn't do it, Kel was always bashful about the intimacy he shared with Nariya. She was typically the aggressor, even when she was in a much smaller body.

"Do you think you can even take it? I wouldn't want to break you or an-

"Bull. Shit," Nariya interrupted, bucking her hips back against the top of her brother's shaft. Her backside was tiny, but held a smooth and rounded curve that allowed her to tease Kel so that he quivered with delight, unleashing a thin mess of precum into the fur upon her tail. "I know what you think about when you see her, Kel. You want to pin that sultry little bitch to the forest floor and fuck her so deep that she has to crawl her way back home..."

Poking the larger beast that was her brother was a fun game, but Nariya had a bad habit of taking things a little too far. She was right about how helpless she'd be against him, and he proved it with a mere swipe of the paws, resting them around her midsection and gripping her tight.

"You're such a little shit," he growled at her. Normally soothing orbs of cocoa were narrowed upon her body, fangs were tightly clenched, and a throbbing length was twitching at the parted folds of her labia, already glistening with arousal that she didn't bother trying to deny. "You act all high and mighty because I've got a crush, but I'm not the only one sneaking peeks at other beasts in the forest."

Nariya didn't want to call his bluff, but if Kel was even half as observant as she was, he wouldn't make such a statement flippantly.

"I...I only really fool around with you, Kel."

Her words were thinner than her lips as Kel pushed her body back, forcing her petals to spread apart on the tip of his manhood. Confident eyes of caramel winced shut as Nariya did her best to adjust to the limitations of her new body, but she couldn't help squeaking in discomfort and delight as Kel pushed her smaller form to the limits with only the tip of his cock. The first few inches left her trembling on his stomach, helpless to stop the slow and easy push of his thighs.

"We both know that's a lie," Kel replied, sneaking an eye open to watch his sister struggle against his larger manhood. "Just admit who you've been looking at, little sis...and I'll turn into him."

Judgment was only a sliver of the fear that Nariya felt as her brother rocked his hips back and forth against her body, dipping the very tip of his manhood into the part of her folds before angling his shaft so that it would pop free and glide over the hood of her clit.

She was more afraid of how tough it already was just to take a couple of inches of a coyote's length, when the fantasy in the back of her mind was something much larger.

"Toren..."

Once bold and playful, Nariya was reduced to a tiny, trembling ball of fluff and arousal, hardly able to voice her innermost desires.

"Did I just hear that right?" Kel asked, flickering one of his tall, sharp ears as if he really didn't understand her answer. "Toren? The big, emerald dragon that skulks around the edge of the forest and looks at you like you're nothing more than a snack waiting to be eaten?"

Nariya winced her eyes shut; she was glad that a jolt of ecstasy was to blame, giving her an excuse to avoid the teasing gaze from her brother's eyes.

Her silence, save for the pathetic whimper that escaped from her lips, was answer enough for Kel. If she'd opened her eyes to look at his once more, she wouldn't have seen the comforting swirls of brown that she'd come to know so well, but a golden-orange glow that was so piercing, she could feel his stare crawling across her body.

"You're probably into that, too," Kel taunted. "I'm not really in the mood to carry you around in my mouth, though."

"S-such a fucking jerk..." she groaned, wincing one eye open to gaze up at her brother, already in the middle of his change. Thick scales of impenetrable green were already growing into life upon his muzzle, coating the bridge of his nose like a freshly built wall of painted bricks. "If you're not gonna indulge my fantasies, what are you g-gonna do to me...?"

The shallow, easy pace of the tip of his manhood came to a halt as Nariya was treated to the unusual delight of a cock changing while still buried inside of her folds. She was used to the pleasant, smooth taper of a canine member, and even as a fennec, she was well suited for taking it.

Her body was pushed to the limit almost immediately as she felt a triangular flare bulge against her inner muscles and stretch them out. Ridges began popping up from the topside of the shaft, leaving even the most subtle motion to drive her wild with earthly delights.

She was panting rapidly, _desperate_to keep the massive insertion buried in her snatch, even if she knew she couldn't handle it.

"N...no, no! Fucking s-stay in there!"

No matter how she clenched, she could feel the flared tip of a uniquely draconic cock pushing back out and parting her labia. They stretched wider than she'd ever felt as the tip popped free, leaving behind the shallow gape of her vaginal passage, still squeezing at the length that it now missed.

Even the precum would have been a bit too much for her to hold. As Kel did his best to model his nethers the way that he imagined Toren's would appear, his inner workings rose to meet the challenge, providing a volume of precum that would match the greater beast.

Nariya was utterly soaked in the mess as it oozed from the still growing tip. "Sorry, sis. Looks like we're just gonna have to improvise a little bit."

"You know I don't mind getting creative," she replied, eager to change into something more fitting for the task but willing to stay as a fennec to entertain her brother's own fantasies. "What can this sweet little vixen do to make you cum, you big, bad dragon?"

Being pushed so close to the brink of orgasm was bringing out the lustful side of Nariya once more. She watched as her brother's limbs grew out of control, with flesh bubbling up on top of itself and building up to the massive, tree trunk arms and legs of a proper dragon, but even as his form loomed over her, she fancied herself to be in control of the situation, and his pleasure.

He'd make keeping a hold of the reins a difficult task if he had anything to say about it, but little more than feral grunts escaped his muzzle as it continued to grow, coated with green scales.

Massive fangs began peeking out from under his jowls, and a long, sloppy tongue slicked over them with glistening saliva, teasing Nariya with the lewd possibility of just how enjoyable it might be to sit in his muzzle, even if it was just for a fleeting moment.

She wouldn't give up on experiencing that fantasy...but now wasn't the time to pursue it.

Now was the time to make her brother cum, by any means necessary.

"If you keep talking like that, you'll be soaked from head to toe without even touching me," Kel admitted; if it were possible for a dragon to blush, he knew that his cheeks would have been burning with obvious fluster. "But that wouldn't be any fun...I'm sure that sweet little vixen would rather get to play with her toys before she puts them away?"

"It's not a toy," she groaned, though she was genuinely appreciative of his playful attitude. "It's a huge, throbbing dragon cock, and I wanna feel what it's keeping from me..."

Kel was still too busy focusing on his transformation to come up with a way to make things work, as massive talons grew out from the ends of his widening paws, each one sharper than the finest blade and darker than volcanic glass. The soft ridges of a pale, white underbelly were hardening where fur once covered up his torso, and shoulders and hips were finally growing to be large enough to make sense against the massive limbs that kept his body so high off of the ground.

Twin nubs popped from the back of his skull as he loomed over Nariya, his eyes burning with intensity, and a question at her intentions. The nubs were growing into long, terrible horns of white as he gazed down between his front legs, standing over her body in a feral pose and replicating a situation that only ever existed in her fantasies before.

Impressive as he looked overall, it was the delicious ridges of pink along his cock that Nariya was most enticed by. Tiny paws reached up to wrap around the head as she pushed crotch up into the ridges, lining her clit up with them just right so that each pass of his length would drive a maddening pleasure through her form.

"Get fucking, big boy...and don't you dare hold out on me."

They'd taken foreplay too far once again, but neither sibling was complaining. Precum oozed with incredible volume over the tiny fennec, making for natural lubrication that was easily up to the task. Her entire underbelly was pressed up to the underside of his shaft, and her soaked, matted fur made for a delightful ride as he began to thrust, gliding his length over her entire body and pummeling her clitoral hood with the ridges along his unique length.

"T-that's it...slowly..." she pleaded, her tiny muzzle only able to swirl a tongue around the tip of his cock before it retreated. She was drinking down every drop of precum she could get as she became a living cocksleeve for her brother, but something much sweeter was rushing toward the tip with lustful haste.

Kel was embarrassed: such a large and threatening creature should have lasted longer, but the downy soft fur of the fennec below was so ticklish and delicate against his already pulsing flesh that he was shocked he'd lasted more than a few thrusts. The slow, easy grind was just was Nariya needed as well, and her tiny paws were quivering as they struggled to hold on.

The dragon abided her orgasmic struggles and lowered his haunches, pinning her under the weight of his cock just as his thrusts came to a rather sudden halt.

"Fuck...f-fuck yes, Kel...just do it; soak me in your cum!"

She'd taken her sibling's mess plenty of times, and there was no part of her body that was off limits.

That was lucky, given the sheer volume of the first gush of draconic seed that spilled from the tip of his cock and soaked the entire roof of her mouth as she opened it to gasp. Excess ran over her cheeks and coated the ground around her tall, fennec ears, with even more than that spilling down her chest and over the length of her torso. A terrifying grunt rang out from the cave as the massive dragon found himself quick to release another torrent of seed, and under the mess of delicious cream, his sister was starting to disappear.

If not for feeling her dripping, eager cunt against the underside of his length, he might not have been able to see her at all, but a squeak of sexual frustration escaped from a muzzle that was so full of cum, Nariya couldn't possibly keep up with it.

It wasn't quite the proper orgasm that she was hoping for, but once Kel finished coating her, she'd give him a few minutes to recover...he wasn't getting to sleep until she was completely satisfied.