Obligatory Content Warning: The following story contains GRAPHIC SCENES of a SEXUALLY EXPLICT NATURE between UNDERAGE FURRY CHARACTERS, including VAGINAL PENETRATION and ORAL, as well as IMPLIED INCEST.  If any of this offends you, DO NOT READ ON.  By reading beyond this point, you waive your right to be offended by my work, because YOU WERE WARNED.  For those of you who I haven't scared off... enjoy!

Chuck's ears perked up as he looked at the fox.  "I-I guess... w-w-whatcha gonna do?"

"Yiff," Becky said, winking at the border collie.

The pup's cheeks flushed at the word.  "Oh... o-ok..."

"Aww!  No fair!" Ellie said.  "You guys get to yiff, and Martin's prolly yiffing daddy, and I'm left alone!"

"You won't be alone, Chuck will be with you!" Becky said.

"But I can't yiff HIM!" Ellie protested, not noticing as the pup tried to sink deeper into the chair, his face becoming a deeper red.  "He doesn't like yiffing!"

Robbie sighed.  "Tell you what.  I'll yiff you tonight after my friends go home.  Deal?"

"Deal!" Ellie said, giggling in triumph.

Becky grinned and grabbed Robbie's paw, dragging him at full speed out of the den, leaving Chuck and Ellie alone.

As soon as they were gone, Ellie leapt up and hopped onto the couch, then patted the cushion next to her.  "C'mon, Chuck!  Let's grab the couch while they're gone!"

"I-I'm fine here," Chuck muttered.

Ellie raised an eyebrow, then got up and walked back over to the recliner, retaking her seat next to Chuck.  "Chuck... are you ok?" she asked.

The pup looked pointedly away from her.  "F-fine," he muttered, failing to stifle a sniffle.

The vixen wrapped her paws around the pup, giving him a little squeeze.  "It's ok, Chuckie... you can tell me what's wrong."

For a minute, Chuck remained quiet, starting to shiver.  Then he whispered, "Y-you don't l-l-like me..."

"What?!  No, that's not true!  I like you, Chuck!" Ellie protested.

Chuck sniffled again and shook his head.  "Y-you d-d-don't like me... c-'cause I won't y-y-yiff..."

Ellie's eyes widened.  "Oh... no, Chuck, that's not what I meant at all!  I do like you!  Honest!"

For another minute, the pup remained silent.  Then he whispered, "W-would you like me... i-i-if I y-y-yiffed you?"

"Ye... no," Ellie said, catching herself.  She considered his statement for a few seconds, and thought back to the talk she'd had with her parents.  "No.  Not unless you really did wanna do it, and you weren't doin' it jus' so I'd like ya.  I want you to do it 'cause YOU wanna, not 'cause I want ya to."

Chuck nodded, then turned to look at her.  "E-Ellie... I... I do wanna try it again... b-but you gotta keep it secret... ok?"

Ellie nodded and smiled at Chuck, then gave his nose a quick lick.  "Ok... but, uh... lemme go do something real quick first," she said, getting up.

The pup nodded and watched as Ellie ran from the room.  A minute later, she returned, followed by her mother, Terry.

The older vixen sat down on the couch as Ellie climbed back into the recliner with Chuck.  "Now, what's this you want to talk about?" Terry asked.

Ellie looked at Chuck, who was blushing anew, and then at her mother.  "Chuckie wants to try yiffing me again," Ellie said.  "But I don't wanna keep goin' if he wants to stop and I can't hear him tell me.  So... would you watch, and stop me if Chuck wants to stop?"

Terry's ears perked, and she looked from her daughter to the pup sitting next to her.  "I suppose I could... if Chuck's ok with that.  Is that something you'd want to do?" she asked, reaching out to rub Chuck's arm.

The pup shivered uncontrollably as the older vixen made contact.  He remained quiet for a few seconds, then nodded.  "P-p-please don't tell Robbie," he whispered.

Terry smiled and leaned in to give Chuck a quick kiss on his forehead.  "Your secret's safe with us, sweetie."

Ellie grinned as she leapt up, pulling off her dress as quickly as she could.  Her panties followed right after.  "C'mon, Chuck, get naked!"

Slowly, Chuck got to his feet, and fumbled with the button on his shorts.  Once they were open, he released them, letting his pants fall to his ankles as he pulled up his shirt and took it off.  Last to go were his briefs, which he pulled slowly to his ankles.  The pup shivered as he stepped out of his pants and underwear, and wrapped his tail around his crotch, blushing fiercely.

"Isn't he cute, Mommy?" Ellie asked.

Terry smiled and rubbed the pup's arm, then leaned in and whispered, "Remember, you can say 'no' at any time."

Chuck nodded and looked over at Ellie.  "S-s-so... h-how do ya w-w-wanna... d-d-do this?"

The younger vixen grinned and licked Chuck's nose.  "Sit down in the chair!  And yur gonna have to move yur tail," she said, placing her paws on his shoulders and guiding him back to the recliner.

"Now, now, don't rush him," Terry said, reaching out and pulling Ellie over to sit in her lap.  "Let Chuck set the pace, sweetie."

The border collie blushed deeply as Terry pulled Ellie away, and took a few deep breaths before sitting down in the recliner, moving his tail away from his crotch.  "Umm... I th-th-think I'm r-r-ready," he whispered.

Almost before he finished saying it, Ellie launched from her mother's arms and into the recliner, straddling the pup.  "It'll be ok," she whispered as she reached down, a grin spreading across her muzzle as her paw found his hard cock.

"Just relax," Terry said, reaching a paw across and ruffling Chuck's headfur.  "If you change your mind, just say the word, and I'll put a stop to it."

Chuck nodded to Terry, reaching a paw up to grasp hers briefly, then turned his attention to Ellie.  "S-s-so... w-w-what do I h-hafta do?"

Ellie giggled as she lined up Chuck's tip to her already-moist entrance.  "Just sit back and enjoy," she whispered.

A small gasp escaped Chuck's muzzle as Ellie pushed her hips down, the pup's cock easily sinking into her waiting pussy.  The vixen's paws wrapped around the pup's chest, pulling him in close as she let out a little moan.

Chuck shivered uncontrollably as he felt his cock sink into Ellie's warm folds.  He squeaked as he suddenly felt a large paw on his shoulder, his head snapping to his left to look at Terry.

"Relax," Terry whispered.  "We'll take it slow."

The pup nodded, and looked back at Ellie, noticing that Terry had placed her other paw on her daughter's back, halting the vixen.

Slowly, Chuck reached forward, wrapping his paws around Ellie and giving her a little squeeze in return as she sat in his lap.  It was perhaps the oddest sensation the pup had ever felt: his cock buried in a younger female's pussy, with her mother watching!  An odd mix of embarrassment and excitement overwhelmed the pup, and he buried his muzzle in Ellie's neck, inadvertently inhaling her scent.

After a minute, Chuck started to relax.  The vixen's pheromones were oddly calming to the pup.  Before he even realized it, pushed on by instinct, his hips began to squirm under the vixen, Chuck's member starting to slide in and out of Ellie's welcoming sex.

"Mmmm... havin' fun, Chuckie?" Ellie whispered.

"Y-yeah," Chuck gasped, squirming a bit as he felt the older vixen's paw lift from his shoulder.  He squeezed his eyes shut as the vixen grabbed the back of the chair, focusing on the feeling of her body pressed to his and the incredible warmth enveloping his cock.

The younger vixen grinned as she gripped the recliner, using it as leverage as she rocked her hips in time with Chuck's movements below her, pressing her crotch in against his each time he sank fully back into her.  Her tongue lolled out as she shut her own eyes, concentrating on riding the pup below her.

From the couch, Terry found herself in a struggle against her own libido.  How she wanted to touch herself!  But she knew she had to keep an eye on the two kits for Chuck's sake.  Besides, it'd make wonderful masturbation fodder later.  Or perhaps lead to something else...

A soft whine from the younger pup drew the adult back to reality.  She leaned in and whispered in Chuck's ear, "You doing ok, sweetie?"

"F-feels... s-so good," Chuck panted, his paws moving down to Ellie's hips and gripping them tight as he started thrusting in faster, quickly working into a fast rhythm, his hips slapping against the vixen's.

Ellie moaned softly herself, nuzzling between Chuck's ears as he thrusted faster.  She grinned as she suddenly pulled back, leaving the pup whimpering.  "I've got an idea," Ellie whispered.

Chuck watched as Ellie pushed herself off the recliner and sat down on the coffee table in front of the couch, her legs spread wide.  The pup's cock twitched as he watched the vixen presenting herself to him.

"Well?  Whatcha waitin' for?" Ellie asked, wagging a finger to summon him.

For a few moments, the pup was frozen in place, mesmerized by the sight before him.  As her words sank in, though, he stood up, fumbling a bit, and looked down at Ellie, bending his knees a bit to get his cock lined up with her waiting pussy.

Ellie grinned and threw her legs around the pup's waist, pulling him in, both kits gasping as his cock found the mark on his first go, sinking back into the vixen's eager, moist sex.  "Yesssss," she whispered.

Chuck yelped as he nearly fell forward, catching himself by grabbing the sides of the table.  He found himself face to face with the vixen, and Ellie threw her arms around his torso, pulling him into a kiss as his hips resumed their work.

As the two kits lost themselves in their own pleasure, Terry slipped a paw up her skirt.  She smiled a bit, inwardly giving herself a little pat on the back.  Today was a good day to forego panties.  A little murr slipped from her lips as her fingers began to trace around her clit.  It took all of her willpower to keep from doing more than teasing herself, but right now, her focus had to be on the cubs' pleasure, and in particular on Chuck's comfort, though from the looks of things, it wouldn't be much of a problem this time around.

A sudden squeak from the pup drew Terry's attention.  Chuck's tail stood straight out, his hips no longer moving, his eyes shut tight as he lay frozen atop the gently squirming younger vixen.

Terry giggled a bit and slipped down onto her knees, and leaned in toward the two cubs.  "Tied the knot?" she whispered.

Ellie murred and nodded, reaching a paw down between them.  A few seconds later, and she was panting herself, squeezing Chuck with her free paw.

A few seconds passed with Chuck remaining motionless, save for the twitching of his cock as he spurted his seed in the vixen's waiting cunny.  Once he finished his body went limp, tail drooping between his legs as he looked down at the vixen.  "S-s-sorry," he whispered.

Ellie giggled and licked the pup's nose.  "For what?  You feel nice inside me," she whispered.

Terry smiled and rubbed Chuck's back.  "Wasn't so scary, now, was it?" she asked.

"I-I guess not," Chuck muttered, resting his head next to Ellie's.

The adult smiled and nuzzled the two, then looked down at Ellie.  "How about you?  Happy now?"

Ellie murred softly and nuzzled Chuck's cheek.  "Uh huh... Chuckie's awesome."

Chuck's ears drooped a bit as he blushed.  "Y-you d-d-don't mean that," he muttered.

"'Course I do, silly Chuckie!" Ellie replied, giving him a little squeeze with her arms, her legs hooking behind his thighs to give him another little tug against her, making both gasp and murr.  "Think ya might wanna do this again?" she whispered.

The pup shrugged.  "Dunno," he replied.

"There's plenty of time to decide that later," Terry said, giving Chuck another little reassuring pat on the back.

The next few minutes passed in silence, until, with a small pop, Chuck's knot deflated and slipped from the vixen's pussy.

"G-guess we gotta wash up," Chuck muttered.

Ellie grinned as Chuck got up, and pushed herself up right after him.  As soon as she was on her footpaws, she pushed Chuck back into the recliner, and dived between his legs, her tongue working around his retreating member and working her juices out of the pup's crotchfur.

A soft yelp escaped the pup as he found himself pushed down.  It was quickly replaced with a murr as he felt the vixen cleaning him with her muzzle.  He shut his eyes, gripping the arms of the recliner as Ellie's tongue cleaned him.  When she was done, Ellie stood and patted Chuck's muzzle.

"All clean," she whispered, leaning in and giving him a quick lick on the nose.

Chuck blushed and opened his eyes, then glanced between her legs.  "D-do you want me to... y'know..."

Ellie giggled a bit.  "Only if you wanna!" she said.

The pup's ears drooped as he shook his head.  "N-nah really..."

Ellie nodded.  "It's ok.  You don't have to."  She squeaked as she felt her mother's paw touch her shoulder.

"Well, then, perhaps I could?" Terry whispered.

Ellie looked at Chuck, then up at her mother.  "Sure!  But, uh... maybe in another room."

"Exactly what I was thinking," Terry said as she took her daughter's paw.  "We'll be back shortly."

A couple minutes later, Ellie was back in the den, curled up on the recliner with Chuck.  Both had dressed, and settled in to watch some cartoons.

Terry sat down on the couch and looked at the two cubs.  "Everything going to be alright?" she asked.

Ellie looked at Chuck, who nodded, snuggling a little closer to Ellie.  "Y-yeah," Chuck whispered.  "I think so..."

The older vixen nodded and stood up.  "Good.  In that case, I'll go start dinner.  Have fun, you two!" she said as she left.

For a few minutes, the two sat in relative silence.  The only sounds they made were giggles at the cartoon antics unfolding on screen.  As a commercial break began, Ellie leaned in and whispered in Chuck's ear, "You sure you wanna keep this secret?"

Chuck nodded.  "Y-yeah... f-f-fer now, at least... it's just... k-k-kinda weird... I mean... yur my f-f-friend's sister..."

Ellie giggled a bit and nodded.  "Gotcha.  But, ya know," she said, putting a paw on Chuck's cheek and turning his head to look into his eyes, "I'd hope I can be yur friend, too."

"R-r-really?" Chuck said, his eyes widening.

"Why not?" Ellie replied, giving him a quick peck on the lips.

Chuck couldn't help but to grin, his eyes lighting up in a way the vixen had never seen before.  "I... I'd like that," he whispered.

Ellie grinned and gave him a little hug, and the two settled in to enjoy their show until the other cubs returned.