"Anonymous, BAU BAU!"

The twin demon guard dog sisters thank another superchatter at the end of their stream. Fuwawa, the older one, sits in front of Mococo, on the shared seat of the computer chair.

Fuwawa reads the comment. "Anonymous has a question: 'Since Fuwawa and Mococo live together, do you share belongings? If so, which ones?'"

"Thank you for the question!"

"We answered something similar on Kiara-senpai's Holotalk—we share almost everything, but for some things like clothes there's, well…" Fuwawa's voice starts to trail, "a bit of a difference."

"A difference?" Mococo enquires skeptically.

"Yeah, you could say that…"

Fuwawa shifts her weight, her soft enormous breasts jiggling from the movement. She giggles and a demoralized "un" from Mococo can be heard in the background.

The chat fills with messages: "lol" "chest…" "lmao" "poor Mococo"

Below the viewers' gaze, Fuwawa harbours a less obvious secret—she is completely pantsless, her ass and pussy exposed to the open air.

A downy tuft of dark blonde hair covers Fuwawa's pubic mound and runs along the sides of her pussy lips. Her labia are thick and puffy, and at present spread apart, resting atop and surrounding a white cloth-covered cylindrical tube laying parallel to the seat. From the way the fabric clings to it, one can discern the outline of a dick, though the impression isn't entirely human. It is leaking at the front end, soaking the clothing that it presses against.

"But it's OK, Ruffians! Because the differences between us are what makes us special. Right, Moco-chan?"

"U-un," hesitently Mococo affirms. The meat shaft belongs to Mococo, and right now she is fighting to control it as her sister tantalizingly slides her slimy sex across its surface.

Easy for you to say, Fuwawa. You got the tits while I'm stuck with this extra thing between my legs, Mococo thinks to herself.

For nearly two hours Mococo had been teased—in both senses—by her older sister while they streamed to thousands of viewers. The edging has gotten nigh unbearable, yet the end is so close in sight. The panties Mococo is forced to wear add another layer of agony as her erect dog dick stretches the material to an extreme. Mococo's hard cock elongates the undies so much that the seams dig into her juicy ass cheeks and threaten to cut off circulation to her legs. Just a few more superchats.

"…chan, Moco-chan?" Fuwawa's voice snaps Mococo out of her introspection. "Moco-chan, we have a request from a Ruffian for a pup talk."

"Eh? A pup talk? Right now?"

"Yes, this Ruffian has been having a difficult time and could use some motivation. They asked for you specifically," Fuwawa answers with a tinge of dejection.

"Um, I can try." Mococo doesn't want to disappoint a fan, even if she is struggling herself at the moment. "But, I'm not really prepared, so no promises that it'll be good. OK, Ruffian?"

"Here, I'll move out of the way," Fuwawa shifts forward off the seat, careful not to lift her bare waist into view of the camera. She goes and sits behind Mococo, keeping her body hidden from sight. A thin sticky strand follows from her crotch. The weight off of Mococo's cock is a welcomed relief. She felt more confident that she can handle this request now.

Fuwawa leans in and squishes her breasts against Mococo's back, whispering from behind, "Go ahead and start, Moco-chan."

Mococo puffs her flat chest out. "H-hey Ruffian! It seems like you're really going through it," she begins.

Fuwawa's right hand darts out around Mococo's hips and grabs her dick. Mococo flinches. Meanwhile, Fuwawa's left hand slithers under Mococo's rear and probes around for her pussy.

Mococo continues haltingly, "S-sometimes, it may not be easy. Things might be-"

"So hard," Fuwawa whispers seductively into Mococo's ears as she grips her red rocket. Fuwawa can barely wrap her fingers around the girth.

"s-so h-hard for you," Mococo gulps.

Fuwawa commences stroking the shaft. The texture of the panties adds friction that heats Mococo's crotch like an oven.

"There may be times when you think you're at your l-l-limit."

The fingers of Fuwawa's left hand caress up and down Mococo's pussy slit. When she reaches the top, her index finger traces circles around the clit.

"At times like that, it's OK if you need a helping hand! We all nn-need help sometimes."

Her sister's hands help themselves to another squeeze of Mococo's privates.

"But just remember! 'This too shall pass.'"

Fuwawa increases her pace. She alternates rubbing the head down-forward with her thumb and upwards from below with her remaining fingers, taking advantage of the slippery precum dripping out. With the other hand, she stirs Mococo's pussy with her forefingers.

"Even h-hard things can't last forever. There's light at the end of the t-t-tunnel! And when you have the s-support of someone else, the end is so close, it's- it's-!"

Fuwawa bears down with a final command, "Come."

"-come, cumming!"

Mococo's cock gushes out gobs of semen, drenching the panties and leaving Mococo in a spasming fit of ecstasy.

"That was great, Moco-chan!" Fuwawa pops out from behind Mococo to take her rightful place in front again. Her bare butt cheeks plop down on the warm jizz that managed to rupture through the panties in a small puddle on the chair.

"Well, that's all the time we have for today, Ruffians. Remember to tune in tomorrow for another Fuwamoco morning! BAU BAU!"

*

Mococo clicks the button to stop broadcasting.

"Is it off?" Fuwawa asks through smiling teeth.

Mococo nods.

"Good," Fuwawa stands up, dropping the grin, "don't get too full of yourself."

She mutters her internal dialogue aloud, "Asking for a 'pup talk'… I may have to give the Ruffians another reminder about excluding me again tomorrow…"

Mococo quietly starts to get up from the chair.

"Where do you think you're going?" Fuwawa snaps. "Your little moment in the spotlight has left a mess here." She points at Mococo's underpants, sopping wet with cum.

"Those panties are from our senpai. They've been passed down from every generation to the next until reaching us. Do you realize the prestige that carries? And you couldn't even contain yourself for a couple hours."

"But you-" Mococo prepares to protest, but is silenced by a stern look from Fuwawa.

"You need more discipline, Moco-chan. We have to prove ourselves extra hard, especially to our JP senpai. You know that."

Mococo stares at the floor. She doesn't want to admit Fuwawa is right about that.

"Hand them over," Fuwawa holds out her upturned palm, waiting.

Mococo sheepishly stands up and grabs the waistband of her panties, then lowers them past her thighs and lifts her right leg to step out of the opening. Her flaccid dick flops to the side. It's shimmering in translucent cum, which also coats the panties and pools in the gusset. She gingerly lays the underwear onto Fuwawa's open palm; a dribble of jizz drips down the side onto the floor.

Fuwawa sighs and repeats the process in reverse. Lifting the panties up to her crotch, she feels the wet smack of her sister's still-warm cum as it attaches to her skin.

"On the ground. Lie down on your back." Fuwawa demands.

Mococo does as told.

Fuwawa walks the length of Mococo's body then turns about and straddles over her head. Mococo watches apprehensively as her sister's wide ass lowers down onto her face, casting her vision in shadow.

Fuwawa lands her pussy directly down until lips touch lips and form a seal over Mococo's mouth, forcing her to breath strictly through her nose.

"You said you like huffing pussies, didn't you, Moco-chan?" Fuwawa snickers.

Mococo tries to refute the misunderstanding that she actually likes huffing cats, but Fuwawa only feels a muffled vibration against her gash when Mococo speaks. Fuwawa ignores it and continues.

"Well, how's the smell?"

Mococo's keen canine sense was not a blessing in this situation. A nose that's sharp enough to detect whether someone is trustworthy is overpowered when facing the onslaught of scents left in that pair of used panties. With the smallest of whiffs, Mococo is assaulted by the intense funk of her own wet semen. The scent transports her back to adolescence when she first learned how to masturbate and managed to inadvertently spurt in her own face. Of course, this time it isn't an accident that she is sniffing her spunk.

Her older sister's taint is the second strongest scent that registers in Mococo's senses.

"That's right, Moco-chan. Really breath it all in."

Fuwawa's sickeningly sweet voice belies the smell of her crotch—a blend of fresh sweat, secretions, and stale piss.

"I've got something else you might like," Fuwawa teases and slides until her butthole locks directly over Mococo's nostrils.

Mococo chokes, unable to breath from any orifice, and a merciful Fuwawa rocks back until she can feel Mococo's hot breath run across her pussy. The unmistakable scent of her sister's asshole enters Mococo's nasal cavity. The same scent that wafted out of their shared bathroom every day after Fuwawa dropped a deuce in it. The stink that Mococo had to stew in if she wanted some privacy while jacking off on the toilet.

A kind of Pavlovian response triggers in Mococo, and her dick hardens again.

"Oh my," Fuwawa exclaims as she watches her sister's penis perk up towards the ceiling. "Aren't we naughty? Let me help you take care of that, sis."

Fuwawa bends forward, sliding all the way until her tummy rests atop Mococo's. Her breasts envelop the erect phallus, the enormous mammaries nearly burying her sister's sizable cock, leaving only a few centimeters peeking out from the top of her cleavage. The remaining semen and Fuwawa's boob sweat are enough lubricant to allow her to perform paizuri by rocking forward and back, the head of Mococo's dick disappearing momentarily beneath the pillowy mounds as they undulate together before popping out like a fleshy game of whack-a-mole.

The oscillating motion of Fuwawa thrusting her upper body and the friction of rubbing her squishy belly across Mococo's abs sets off a reaction in Fuwawa's gut that sends a train of bubbling gas traveling down her lower back.

"Open wide, Moco-chan!" Fuwawa barks way too late as a series of wet sputtering farts leak their way out of her asshole and into Mococo's nose, coating the back of her airway. Fuwawa's fanning tail billows the scent deeper inside. Mococo gurgles. Surprisingly, Fuwawa feels Mococo's cock throb even harder as she suffocates in the fumes.

"It probably really reeks because I have to poop soon."

Mococo doesn't quite hear Fuwawa's last remark, because her brain is overstimulated from the direct injection of stank into her olfactory system and the sloppy boobjob that is putting her on the verge of cumming a second time.

In spite of the sloppiness, Fuwawa is determined. She's trying her best to come across as the sulty and experienced older sister, but in truth her paizuri isn't particularly elegant. She alternates sucking off Mococo, but due to her large breasts getting in the way and Mococo's knot she can only fit the first few centimeters in her mouth. She compromises by using her long tongue to reach further and massage the frenulum, savoring its salty flavour.

Either way, Mococo isn't fussy—she's fuzzy—and as Fuwawa's farts continue to creep their way into her cranium, she quickly finds herself reflexively grasping down at her groin when the convulsions of climax crash over her again. A side effect of being a woman with a dick, Mococo can endure multiple orgasms compared to a man's normal refractory period. An unexpected Fuwawa is caught off guard as her sister's jizz squirts into her mouth. Mococo thrusts upwards, burying herself deeper into Fuwawa's throat and compelling her to swallow most of it.

"Hey, not fair!" Fuwawa coughs as the dregs of semen drip from the corners of her lips. "You need to give me a warning before you shoot that thing in my mouth." Fuwawa runs her tongue along the outside surface of her teeth and spits the cum that clung to her gums.

"Let's see how you like it."

Fuwawa raises herself off of Mococo's chest to sit once more on her face. She vigorously rubs her cunt against Mococo's chin, working open her jaw.

"You must be thirsty after losing so much fluid," Fuwawa declares as she prepares to unleash her own urethral emission down Mococo's gullet.

"Drink up!"

The jet of urine spatters off of Mococo's tongue as she tries to defensively block it, however it's no use. Her cheeks inflate like balloons and some of the piss leaks back out of her nose, but Mococo must choke down her sister's piss lest she drown.

Fuwawa blissfully rests atop Mococo's face and sputters watery farts out of her relaxed ass while Mococo loathingly gulps down the tangy ringo juice. As the stream slows to a trickle, Mococo's cock reaches half mast again. Fuwawa grunts and releases her biggest brap yet deep into Mococo's nostrils. It lasts a full three seconds and smelt strongly of shit. Mococo inhales it and promptly pumps her pecker to full.

After the prolonged brap Fuwawa realizes that her emptied bladder has finally made room for her shit log to descend, and it now headed towards her exit.

An idea crosses Fuwawa's mind as Mococo's erect dick reflects in her pupils, and she sits up again. As Fuwawa pries herself from Mococo's face, the stringy, gluey mixture of semen, piss, and sweat adheres to her rear end and makes a slopping sound. Fuwawa waddles forward on her knees until she's just past Mococo's member. The panties are so swamped that they cling to every crease and nook of Fuwawa's slimy groin.

Fuwawa grabs a buttcheek in each hand and spreads them apart. The outline of her asshole is visible and Mococo watches as she aims it towards her target. Fuwawa jolts when the tip first touches her delicate spot but relaxes and settles back down, the spearhead just barely piercing open her sphincter and resting a centimeter inside her crack. Despite the lubrication, the panties are putting up a protective resistance—Fuwawa would have to go slow. Little by little, the demon dog's dick disappears further up her sister's tail end. Fuwawa grimaces as the full girth spreads her open. But once the head is inside, it encounters the second blockade of Fuwawa's solid shit.

Fuwawa hovers suspended momentarily, the force between the stiffened skivvies and her stool bearing the brunt of her weight. Then gradually, Fuwawa can feel the poop getting packed deeper into her intestines as more of Mococo's dick takes its place in her rectal cavity.

It was fortunate that Mococo had stretched the underwear earlier, as they were now strained again, wrapping around Mococo's cock on its way inward deep into Fuwawa. Still, fabric is only so elastic, and like they did with Mococo's ass cheeks, the panty edges now wedge themselves into Fuwawa's flesh. The taut material squishes Fuwawa's labia and applies a pleasurable pressure to her clit.

After boring 13cm into Fuwawa's fudge factory, Mococo's knot has reached the outside of Fuwawa's anus. Fuwawa can feel her poop now displaced further up her gut and a visible bump distending her belly. With considerable effort, Fuwawa raises her haunches upwards exposing Mococo's shaft to the air, but keeping the head inside.

The sensation of Mococo's thick stick scraping past her rectum walls triggers her body's signal to defecate, and Fuwawa's bowels knead the compacted shit back down towards the opening, only to be blocked again by Mococo's tip. Once more Fuwawa relaxes and squats down, Mococo's dick driving the log upwards as it wriggles its way back in. She moans at the pleasure.

Mococo is feeling it, too. While the cloth undies wrapped around her cock provide a barrier between her and Fuwawa's poop, she can still discern its heat and slight plasticity against her glans. Fuwawa's narrow canal massages her shaft while small air pockets pushed in bubble their way out again as spattering farts which tickle her knot.

Growing slightly more assertive, Mococo grips Fuwawa's lovehandles, then sits up and rolls Fuwawa to the side so that she is on all fours in the doggy position. With renewed vigor, Mococo takes the lead and plunges deep into Fuwawa, eliciting a whimper.

Fuwawa's mind is beginning to slip from the unrelenting stimulation. Each thrust inward fills her gut, pressing poop against the back of her womb, while from the other side the tightening fabric squeezes her clit inwards. With each retraction, Fuwawa experiences the sensation of being forced to shit again and again, but without the satisfaction of being allowed to fully release it. Meanwhile, the turd being pushed back in was like having a dick three times the length of Mococo's worming its way up her colon. Fuwawa drools as her hips rhythmically buck back and forth.

Mococo increases her pace, the little sister's lap slapping against Fuwawa's buttocks as strands of slime fling off to the floor. The scent of shit in the air and her dick in a warm wet cavity drives Mococo to primal levels.

With one final thrust, Mococo hugs Fuwawa vicelike from behind. Fuwawa feels Mococo's knot reach her ring and the tension as her sphincter muscles stretch wider than ever before to accomodate the girth. With a pop, Fuwawa's hole greedily sucks the knot to the base, packing her fudge another 5cm deeper and binding the panties so taut that it bunches up into a thong wedgie between her cheeks and labia. The pressure is so intense between the shit in her guts desperate to evacuate, the underwear strangling her clit, and the shaft and knot of her sister's penis locking it all in that Fuwawa feels like she's going to rupture.

On the verge of an intense orgasm, Fuwawa hears Mococo howl as her dick tenses up and the knot expands even wider. A hot jet of semen follows and douses her deep inside. Fuwawa finally bursts in ecstasy as the twins trade off alternating spasms, Fuwawa's shit trying to push its way out, Mococo's cock blasting it back with thick ropes of cum, and Mococo's knot denying escape to even a single drop.

*

Sweaty and exhausted, Fuwamoco lay panting stacked on top of each other while Mococo's dick finishes draining into her sister. After several minutes, Fuwawa feels cramping in her gut again.

"Moco-chan, can you pull out? I really, really need to go."

Mococo tugs with her hips but Fuwawa's rear jerks along with her.

"I'm trying. It's almost done, just a little while longer until it's back to normal."

Fuwawa's plea shifts to declaration as she cradles her belly. "It's coming out. Now."

Mococo's cock is nearly drained, and has softened a little from its rock hard state earlier, but it is still firmly rooted in place. Mococo hears Fuwawa moan and then a damp warmth propagates around the outside of her red rocket, traveling from the tip to the base. Her own semen mixed with Fuwawa's shit has transformed into a liquid blend that is seeping towards the exit. Yet the knot holds tight and won't let the mixture past.

"Moco-chan, I need you to help out too."

Fuwawa can feel the lump in her tummy working its way down as the pressure continues to mount at her back door.

"On the count of three I'm going to push, Moco-chan." Fuwawa reaches her arms backwards, fingers splayed. Mococo places their palms together and interlocks fingers to use as leverage.

"One… ha… two… hah…" Fuwawa inhales deeply and furrows her brow. "Threee-EEE" On the mark, Fuwawa strains while Mococo pushes with her forearms. Fingernails dig into the backs of each others' hands. Once again Fuwawa's anus distends and spreads to the diameter of Mococo's thick knot. When it crests the apex Mococo is jettisoned backwards as the liquid feces and semen blast out of Fuwawa's backside through the stained undies.

In a moment, the spray subsides to a drip, but Fuwawa isn't out of danger yet. The pliable shit that Mococo had been packing is now pounded into a balled knot of poop and crowning at Fuwawa's butthole.

Hrnng Fuwawa grunts as the shit knob touches the seat of the fabric and halts. A dark brown stain paints the point of impact. Fuwawa inhales and places her hands on her abdomen, ready to provide additional force. She grits her teeth and torturously squeezes the clod out of her hole, the massive dense clump filling the empty space in her shorts. The thick scent clings in the air. Yet there is no time for rest. With the compressed plug now breached, the remaining normal poo begins to rapidly follow.

Inch by inch of firm brown turd surges from Fuwawa's weary hole, heavily expanding and weighing down her knickers until they sag to expose the top of her butt cheeks. The dump sways in the air like a pendulum while Fuwawa squirms to expel the brown serpent. One long continuous piece of crap flows from Fuwawa's arse. Laden with their hefty payload the panties finally droop down and splatter against the floor, Fuwawa's anus still coiling a rope down after it. Fuwawa pushes her hands deeper into her pelvis. A few more light brown centimeters of thin soft poop cap the mound of shit that now lay heaped between the sisters, and a final spurt from Mococo adds the white icing on top.

Fuwawa's hairy asshole gapes open, twitching, finally empty for the first time.

"OK Moco-chan," her breathing is laboured, "it's your turn to wear them again."