It was a bright, sunny spring day.  A perfect day for a walk in the park, Nicki thought.  Just grab an MP3 player, a comfortable shirt and pair of shorts, go for a little jog.  That's what Saturdays are for, right?

"Hey, Seika?  I'm heading out for a jog," Nicki called as he got to the front door.

"Alright," the female replied.  "See you when you get back!"

Nicki inhaled deeply as he stepped outside.  The air was warm, the smell of freshly cut grass wafting in on the breeze.  The German shepherd put in his earbuds, turned on his music, and began his jog, heading down toward the nearby park on the edge of town.  It had a number of trails winding through the adjacent state forest.  That seemed like a good place to go to enjoy the weather with plenty of shade.

Everything was going fine.  He was on one of the lesser used trails, going a little deeper into the woods on the outskirts of town.  It was quieter there, perfect for contemplating.  But as he ran, he noticed something moving in the bushes, something pink.  Nicki came to a stop and turned off his music, pocketing the music player and perking his ears.  Those sounds... it couldn't be, could it?  He had to investigate.

Using all the stealth his species lent him, the German shepherd crept around the bush, and what he saw shocked him.  Two pink cubs, nearly identical save for one being male and one being female, at least if their attire was an indicator, where making out behind the bushes.  From their height, he guessed their age to be around eight.  Their faces looked almost vulpine, with huge ears, though their muzzles seemed a little short for foxes, and their tails were massive, far more fitting on a squirrel than a fox.  The boy had a paw under the girl's skirt, the girl with a paw in the boy's pants.  They didn't seem to notice Nicki's approach.  He wondered if maybe he should make his presence known, but then the girl opened her eyes and gasped as she spied the shep.

"We've got company," she whispered as she pulled back from the kiss.

The boy gasped, and both looked at him.  They didn't seem to be embarrassed to have been caught in such a compromising situation, though.  Quite the contrary.  Their grins were almost scary.  It was as though they WANTED to be found.

"Guess you win," the boy said, removing his paw from under the girl's skirt.

"Guess we BOTH win!" the girl said, walking up to him.

To the shep's surprise, both cubs reach forward and pulled his shorts and underwear down, exposing him to the elements.  Nicki had been watching just long enough to get hard, and now it was on display to these two innocent (or not-so-innocent) cubs.

Before he could say a word, two paws wrapped around his shaft, the boy and girl each working the dog's meat in tandem.  These two have done this before.  They grinned up at him, and the boy said, "Can we suck it?"

Nick's jaw dropped.  He were at a loss for words.  What if someone else caught him with them?  He glanced over his shoulder toward the path, a worried look on his face.  The cubs responded by leading him deeper into the woods, their paws never slowing their stroking as they guided the shepherd down to the ground by a thick bush.  No way anyone would be able to see them here if they stuck to the path.

They took his silence as consent.  After all, he was so much bigger than them!  He could have left any time he wanted.  But Nicki didn't want to leave.  This was an opportunity he wasn't about to miss out on.

A gasp escaped his muzzle as the two cubs leaned in, their tongues flicking over his tip.  The sensation was wonderful, those soft paws stroking his member, and their delicate tongues teasing his sensitive flesh.  The boy latched his muzzle onto the dog's tip, suckling it as the girl moved to lick the shaft.

"Gods," Nicki whispered, laying his paws on the back of their heads.  "You two are good at this..."

The cubs grinned at him, the boy pulling off the shep's tip with a slurp.  A shiver ran down his spine as he felt the cool air on his tip, but it wasn't exposed long.  Almost as soon as the boy was off, the girl leapt in to take his place, her tongue swirling around his tip as she suckled on it.

"Thanks," the boy whispered, climbing up and giving him a quick peck on the lips.  "My br-- uh, my twin and I really like makin' guys feel good."

His lips connected with Nicki's again, holding this time, his tongue seeking entrance into the dog's muzzle.  He granted it, his hips starting to buck into the girl's mouth while the boy made out with him.  This was not the day he expected, but he wasn't about to complain.

The boy pulled back from the kiss, and Nicki gasped.  As the boy returned to the German shepherd's groin, the dog looked at the two.  "Can I touch you, too?"

The twins looked at each other, the girl pulling off the canine's cock.  They exchanged a mischievous grin, then stood up, each pulling their bottoms down.

To his surprise, while the twins were boy and girl, they weren't the ones he was expecting.  The one he thought was a boy turned out to have had a vagina, and the one in the skirt was sporting an impressive four inch boner.  They seemed to relish his surprise, wiggling their hips and showing off their groins before getting back down on their knees on either side of him.

The pink twins didn't wait for Nicki to start touching them before resuming their work on his cock.  Their paws wrapped back around the shaft as they wrapped their muzzles around his tip, their tongues swirling around it.  The shepherd knew he wasn't going to last long.

"Ngh... I... g-getting close," he gasped, barely able to make the words through the haze of pleasure fogging his mind.

This only encouraged them.  Their tongues worked faster, their paws stroking his shaft fast and hard.  They were milking him for his seed, and there was no way the German shepherd would be able to resist their demands.

Nicki's head rolled back, and he bit down hard on his lower lip as he felt himself exploding in their muzzles.  His body trembled, his paws fumbling wildly for the twins' genitals as he pumped their muzzles full of seed.  In the back of his mind, Nicki marveled at the fact that the two seemed to be keeping his seed in their muzzles.

As his orgasm subsided, the two cubs pulled back, grabbing onto the dog's paws and grinding their groins against them.  Damn, these cubs were horny!  He looked down, opening his eyes, and saw that, yes, they had caught every last drop of his cum.  His dick was still raging hard despite the powerful orgasm.  The shep were ready for another go, and both of the cubs knew it, too.

They allowed him to masturbate them for a few moments, before pulling back.  Nicki pushed himself up to sit up, watching the two as they got down on all fours in front of him, wiggling their butts in his face.

"Wanna hump us?" the girl asked.

He stared at those two butts for longer than he cared to admit, and nodded.  "Gods, yes," he whispered.

The twins giggled, each looking at him expectantly.

"Well," the boy said, lifting up his pink fluffy tail.  "Who first?"

Nicki kicked off his shorts and undies, which had still been around his ankles, then pulled himself around onto his knees behind the two cubs.  Which one first?  That was the million dollar question right now.  He took a moment to consider the two rumps behind him, then scooted up behind the girl.  "I think I want your sister first," he said, wrapping a paw around the base of his cock to guide it as he probed between the girl's legs.

The girl murred, pressing back against the canine's cock.  Nicki could feel the warmth from her body, and as he swirled his tip around her entrance, he found her quite moist.  Damn, were these two horny!

"Go ahead and put it in," the girl said, her tail swaying as she looked at Nicki over her shoulder.  "I can take it," she said, giving him a little wink.

Well, that was an invite he just couldn't refuse.  His free paw gripped the girl's tail base as he pressed his tip against her folds, feeling that wonderful heat engulfing his member as he pressed in.  Once he had the tip buried, however, he stopped.  "Wait... you, uh... can't get... you know..."

"Can't what?" the boy asked, looking up at the dog.

Nicki gasped, a shiver running down his spine as he felt the girl's hips pushing back, a couple inches of his cock sinking into her pussy.  Gods, the feel of that snug, velvety puss had nearly made him forget his question.  He shook his head to clear it, his paws moving to grip the girl's hips.  "Umm... you're... too young to get..."

The twins burst out in laughter at his words, making the canine blush.  The boy stood up and walked up close, and whispered in his ear, "Don't worry, we're infertile hybrids.  Our doctor said so.  So have fun."

The canine raised an eyebrow.  It seemed a bit odd that the boy would know that word.  But then, given the trouble he and his sister seemed to enjoy getting themselves into, their parents probably thought it best to check.  Besides, he knew that far off hybrid species were usually infertile, anyway, and surely these two were curious about their genetic heritage.  "Umm... w-what are you two, anyway?" he asked.

The boy grinned.  "We're squirrel fox hybrids!" he said.  "I dunno why we're pink, either.  But it's cute, right?"

"Oh, very," Nicki gasped, and turned his attention back to the girl.  Certainly in the clear now.  He squeezed the girl's hips as he started to thrust into her, his tail wagging behind him as he probed her depths with his member.

As the German Shepherd worked into a steady pace thrusting into the girl, he was surprised by just how deep she could take him.  Each thrust eased in more and more of his shaft, until he had a good four and a half inches buried in her, nearly getting to the top of his knot.  His eyes eased shut, his head rolling back as he let himself get lost in the feeling of that snug preteen vagina squeezing his member.

Nicki gasped as he suddenly felt a new sensation.  His head rocked forward and he looked down, a shiver running down his spine as he figured out what was happening.  The boy had slid in under his sister and was giving his balls a tongue bath.  It also appeared that the girl was sucking her brother's member while the boy busied himself the dog's genitals.

"Oh, fuck," Nicki muttered, letting out another moan as he pressed his hips forward, keeping himself buried in the girl's love tunnel as her brother's tongue moved from his sack to his knot.  "You two... are something else." 

Despite his recent release from the oral treatment, the canine could already feel himself working toward a second peak.  Buried nearly to the knot with two horny cubs out in the woods -- it was electrifying.  And a little voice in the back of his mind teased that his sister might be a little jealous of his play time, too.  He'd have quite a story for her when he got home!

A shiver ran down Nicki's spine when he felt one of the boy's paws grab onto his knot, holding it from the base and tugging gently.  Yeah, these two DEFINITELY knew what they were doing!  It was quite obvious to the shepherd that the boy was simulating a tie, since there was no way he'd be getting his knot into the girl's depths.  The efforts were certainly appreciated, especially when he felt the girl moving herself along his shaft, leaving his own hips to remain relatively stationary as her brother's muzzle returned to his balls, the boy easily slipping one of the dog's generous orbs into his muzzle.

It was all too much for the dog to bear.  He gripped the girl's hips tight and pulled her in against him, the top of his knot just kissing her lips, his tip pressed deep inside of her sex, and he moaned out, a little louder than he'd intended.  But right now, that wasn't important.  His cock pulsed in the girl's pussy, filling her with thick bursts of his cream.  His load quickly filled the crevices of the girl's sex, and started leaking out.  A sudden burst of cold hit Nicki's balls as the boy popped off, his tongue lapping against the dog's knot as he lapped up overflowing semen.

Nicki's body trembled, the dog slightly overwhelmed by the force of his orgasm.  He leaned down over the girl, his arms slipping up to hug her as he rolled his hips, leaving the last few squirts of his seed deep inside her pussy.  "Wow," he whispered, the only word his pleasure-addled brain could formulate.

The girl giggled, and twisted around to give the adult a quick kiss on the lips.  "Feels like you had lotsa fun," she said as she crawled forward, letting his cock slip from her well-used cunny.

The dog's ears perked as he picked up that gentle squelching sound from pulling out of the young girl's puss.  He let out a soft moan, then rolled onto his back, sprawling in the grass, his cock still stiff and glistening with a combination of his own seed and the girl's copious sexual fluids.

The boy crawled up and grabbed onto his knot, leaning down to kiss his tip.  "Want us to lick this clean?" he asked.

Nicki shook his head, and looked down at the boy, a grin spreading across his face.  "No," he said, his tail starting to wag as he spread his legs.  "I... I think I'm good for another go... so why not... use your sister's cum... as lube?" he said, panting a bit from the exertion of his recent romp.

The boy giggled and returned the grin, and crawled up over him, straddling the dog.  "Mmm... sounds fun to me!" he said, easing himself back, his paw guiding the dog's tip to his tailhole.

Nicki's eyes widened.  "W-wait... d-don't you need to streeeeeee..."

His objection turned into a moan as his question got its answer.  With surprising ease, the boy pushed himself back, his snug tailring easily accepting the dog's tip.  Slickened with sexual fluids, the boy easily slid down, until his tailhole was pressing against the top of his knot.  He grabbed the boy's hips, and pressed his own up, hardly believing how easily the boy took him, even as his rump was a tighter squeeze than his sister's pussy!

"Hey, puppy," the girl whispered, one paw stroking Nicki's ear.  He turned to see her kneeling next to him, her legs spread, showing off her puffy pussy, his cum dripping from her folds.

"Oh, we can't have that," Nicki said, releasing the boy's hips and grabbing the girl's instead.  "C'mere..."

The girl giggled and allowed him to guide her over his muzzle, her legs straddling his face.  As soon as she was in position, Nicki pressed his muzzle up, his tongue diving between the girl's lips and lapping up his cum.  At the same time, he felt the boy start bouncing in his lap.  A twin at each end.  What could be better?

After a minute or so, the girl pulled back.  She crawled back a bit, grinning at the dog, then straddled him the other way, scooting up to her brother.  Nicki watched, first curious, then extremely interested, as the girl hugged her twin, one arm wrapping around his chest as her other went down between them, very clearly guiding his cock into her pussy.  Once his dick was in her, she wrapped her other arm around her brother, and the twins locked lips, making out as the boy bounced on the dog's cock.

Well, that was unexpected.  Certainly not unwelcome, though.  The German Shepherd reached down toward the twins and rubbed their hips and sides, his own hips starting to buck into the boy as he watched their incestuous mating.  His cock pulsed, dribbling pre into the boy, the fluids keeping his rump nice and slick for his member.  "D-don't suppose I could tie with you," he said.

The twins broke off their kiss and giggled, the girl slipping back and turning around again, straddling the dog with her back to her brother.  "Oh, I think my little brother would prefer it," she said as she laid down on Nicki's chest.

The boy slapped the girl's rump, earning another giggle from her as she scooted back and grabbed his cock.  "Beeeelle, we're twins!  We were born on the same day!" the boy whined.

The girl giggled as she guided her brother's cock into her pussy, her hips rolling to match his bounces so he could yiff her while he rode the dog.  "I know, but I was born a whole seven minutes before you, so I'm the big sister!" she said, looking at him over her shoulder and sticking her tongue out at him.

The boy returned the tongue, then grabbed her hips, pulling her into him as he ground his butt down against Nicki's knot.  "Whatever," he said, his paws slipping under the girl.  From what Nicki could feel, his paws were probably at her groin, fingers teasing the girl's clit.

The exchange between the siblings had caught Nicki off guard.  It seemed pretty typical for twins, and he probably would have found it funnier if he weren't so horny from having his dick buried in one of them.  His paws grabbed onto the boy's hips as he felt him pressing down against him, that impossibly tight tailhole stretching around his knot.  There was no way his knot was going to fit in there!

At least, that was what he thought.  As his hips bucked up to greet the boy in his lap, he felt a sudden jerk, followed by his knot being engulfed in warmth.  Nicki's eyes bulged in disbelief, a paw reaching down under the boy, his fingers confirming what his body was telling him: his knot was firmly buried in the pink boy's butt.

"Aaah... fffffff... oh gods," Nicki muttered, his hips rolling up against the cub in his lap.  He squeezed his eyes shut and moaned out, his back arching as mind caught up with his body.  The dog's cock twitched wildly, squirting his third load of the day deep inside the young boy's rectum.  It was impossibly tight, the boy's ring hugging his shaft and knot far more than he would have suspected possible considering the relative ease with which he buried his knot in there.

Atop the dog, the boy murred, rolling his hips to ride the dog's cock as he was filled up with spunk.  His sister pressed her own hips back, easily taking her brother's knot into her sex and grinding against his groin, earning a moan from the two of them.

"Mmmm... I can still feel his seed inside ya, sis," the boy said.  "It's so warm and sticky!"

A shiver ran down Nicki's spine as he heard the boy declare that.  Damn, was that hot!  Knowing that the boy could feel his seed in his sister's pussy while he humped her was just... divine.  His cock twitched as he pressed his hips up against the boy's bottom, an extra couple squirts of cum into him punctuating the jolts of pleasure from that naughty knowledge.

Nicki gasped as he felt the boy's tailhole clench tight around his cock again.  From the way he was shivering, he was fairly certain that the boy was hitting his own climax in his sister.  He reached up and caught the back of the girl's head with a paw, and pulled her down, pressing his lips to hers and pushing his tongue into her muzzle.  A grin spread across his muzzle as he heard her surprised squeak and felt her tongue eagerly swirling around his.  He didn't hold the kiss for long, letting the girl go and lying back as he let out a contented sigh.  The dog was spent.  He'd just rest his eyes for a moment and try to recover some strength...

When Nicki opened his eyes again, he was alone.  He sat up and looked around.  It was still afternoon, but based on the position of the sun, a couple hours must have passed.  He gasped as he realized that he was still naked, and looked around for his clothes, letting out a sigh of relief as he spied them laid out neatly nearby.  The German shepherd shook his head as he pulled his shirt and shorts back on, then stretched, wondering if he'd really just done what he thought he did.

As he started making his way back to the path, he spied something in the bushes near where his clothes were.  He bent down and leaned in, a grin spreading across his muzzle as he saw them.  He reached forward and grabbed two pairs of underwear, a pair of briefs and a pair of panties, clearly cub sized.  Those twins must have left him a little present.

He stuffed them in his pocket, and felt a piece of paper in there along with his mp3 player.

"Hmm..."  He withdrew the paper and his music player, and put in his ear buds before unfolding the paper and reading it.  All that was written was an address -- one not that far away from the park.  A grin spread across his muzzle as he folded it back up and pocketed it.  Oh, he was going to have fun with these two.

Nicki paused as he reached the trail.  He hadn't gotten the cubs' names!  Not the boy's, at least.  He'd called his sister something... Belle, was it?  Something like that.  And the cubs certainly hadn't gotten his.  Well, that would just make things more interesting if he showed up at the door.  Just play it cool.  He shook his head, and resumed his jog, eager to get back home and share his little encounter with his sister.