Zen managed to finish most of his homework.  He hadn't spoken to Ivi and didn't see her when he snuck downstairs for something to eat.  He wasn't sure what he would even say.  Mostly he wanted her to return, say nothing, and let him experience what an actual handjob felt like.  Whatever his embarrassingly short first time could be called, Zen craved more.  He had wasted half his night simply sitting at his desk, hoping his sister might return.  She hadn't.

Their parents returned home late, and after making his usual platitudes - school was good, his day was good,  everything was good - Zen finally gave up and readied himself for bed.  The moment his head hit the pillow however, his thoughts raced.  Limra's round butt, his sister coming up behind him, her soft breasts against the back of his head, her fingers slipping beneath his underwear-

His slim cock struggled against the confines of his underwear.  Zen tried to adjust himself but couldn't find a comfortable position.  Without his sheath protecting his sensitive length, tucking it beneath the elastic only intensified the discomfort.  He squeezed his eyes shut, desperately trying to banish every improper thought from his brain, but that helped even less.

Increasingly frustrated and exhausted, Zen wriggled free of his pants and underwear all together, stashing his clothing under the bed, and finally relaxing.  A little.  His dick still twitched, a growing tension, the muscles between his hips growing weary from their constant plea for relief.

But it was enough, barely.  Zen's eyelids grew heavy, the onset of slumber muffling his senses.  He didn't hear his door open, or the soft click as it shut again.  Even the ruffling of sheets didn't banish the encroaching darkness.

A warm body sidled up against Zen's back, spooning him.  An arm slipped beneath his head and curled across his chest.  To his surprise, he didn't jump or shout.  Zen's body completely froze, breath stilling in his lungs, suddenly alert.

Ivi wriggled close against his back, her breasts firm and comforting against his back.  The hand she placed on his hip let her snuggle closer, then once their bodies lay flush, trailed up beneath his shirt to stroke his belly.  Her body awkwardly trapped his tail between them.

She whispered into his ear, barely audible even as her lips tickled his fur.  "Wow.  Do you always sleep half naked?  Or were you hoping I'd come visit?"

Zen struggled to breathe again, forcing his chest to relax, mind racing through a mire of desperate lust.  He made a soft unintelligible noise amidst the wondrous sensory overload.  Fingers delicately traced lines through the silky fur covering his belly, brushing his hip.  His erection fully woke before he did, twitching in anticipation.

Ivi's hand dipped perilously close to Zen's cock.  "Do you think you'll cum before I even touch you again?  You better not."  Ivi leaned in close and bit the back of Zen's ear.

Zen gasped, pleasure swirling through his body, her subtle threat nearly making a mess of his sheets right then.  Ivi took the momentary distraction to slip free of her own pajama bottoms, kicking them off and once more cuddling up against Zen's back.  She trapped his tail between her legs.

Willowy arms embraced Zen, pulling him close, her breasts squishing into his shoulder blades.  Ivi's hips nestled up against him, the base of his hairless tail settling between her thighs.  Slick heat mated the smooth muscle of his tail with the impossibly soft flesh between Ivi's legs.  Tiny claws sank into his chest, and Ivi whined in satisfaction.

Ivi slowly rocked her hips against him, grinding herself against the sensitive base of his tail, letting him imagine how luxurious her sex might feel against his cock.  Zen never realized how some of the muscles that made his cock twitch were mirrored to a lesser extent by his tail.  He didn't do it intentionally, but Ivi gasped at one such contraction, stifling a moan by biting Zen's furry shoulder.

She growled.  "You have no idea how fucking wet I am right now."  Despite the tension he felt in her claws, long fingers digging into his belly, her hips didn't falter, maintaining their slow, sinuous motion.  "If you asked to have sex with me right now, I'd let you.  You could take my virginity, cum inside me."  A powerful shudder ran through her body, her fingers tightened painfully around his hip, a soft moan hissing through bared teeth.  Ivi took a deep, steadying breath.  "But I know you won't."

Zen couldn't have spoken to save his life.  No one had ever touched the base of his tail before, not even himself.  He never realized just how sensitive it was, letting him feel every detail of Ivi's pussy gliding against his skin.  A tiny stiff nub crowned her lips, giving way to supple lips that spread around him, a fierce heat leaving his tail slick, her hips quivering to a halt, that tiny nub grinding against the gentle curve where his tail and back fused.  Zen could almost imagine her lips sealed around his cock.

Ivi panted hard, her hips grinding to a halt for the first time since they'd started.  She shifted, readjusting something, her hand reaching between their bodies.  He felt her touching herself, before wriggling back close.  Once smooth motions became sporadic, hips bucking and twitching against his back.

Ivi's voice hissed through teeth grit in pleasure.  "I think I like you like this, an obedient little toy."  Two fingers plunged between Zen's parted lips before he could react.  She silenced his cry of surprise, trapping his tongue beneath her fingers.  "Suck."

He did so before her command even registered, some deep instinct locking his lips tight around willowy fingers, the bright tang of her sex filling his senses.  The slick fluid covering her fingers made him work to savor it from her slender fingers and tiny claws.  It was her taste that pushed him over the edge.

Pleasure focused his entire being into one singular moment, Ivi's hips grinding against the small of his back, her fingers thrust between his lips, palm cupping his chin.  Zen's eyes fluttered shut, entire body squeezed with each powerful contraction that wracked his body.  His hips jerked against nothing, cock wasting its meager contribution into his sheets.  Through the searing intensity of his orgasm, a single pillar of unattended need remained stoic, his cock aching for the touch it never received, freely twitching in the air.

"Did you just-?"  Ivi groaned, Zen's tail twitching against her right as she bucked against his base.  "Pathetic," was all she managed to get out around a protracted whine of her own.

Ivi clung to Zen, her claws biting into his chest, the fingers in his mouth arching his head back into the crook of her shoulder, letting her muzzle rest atop his.  Her hips trembled against the base of his tail, lips spread snug around him.  Her sex gripped him, rhythmic contractions fluttering against his tail, leaving the fur near his base matted and damp.

Her orgasm lasted far longer than his, Ivi writhing against him, wordlessly snarling into his shoulder before finally stifling herself with his hide between her teeth.  And just like him, she fell slack, every last flicker of life drained from her body, chest heaving in deep gasping breaths.  Even in their shared weary afterglow, Zen appreciated the rise and fall of her breasts against his back.

All of the fatigue that arousal held at bay now descended upon Zen in earnest, the messes both in front and in back of him a problem for later.  Ivi's comforting embrace only hastened him towards slumber.  The last memory he had was an arm slipping out from underneath him, an unpleasant chill replacing her against his back, and wishing Ivi could have stayed.

~*~

Zen bolted upright at the first grating chime of his alarm, heart racing.  Only when his covers fell away from his chest did he realize he was still half naked.  He swiped away the alarm from his phone and scrunched the sheets up over his bare crotch, half expecting his mother to burst through the door right then.  No one did.

Breathing hard and uncomfortably awake, Zen blinked the sleep from his eyes and groaned.  A small stain marked his sheets where he came, and the base of his tail remembered Ivi's wet pussy against it.  Zen hurriedly dressed and scurried off to shower before he could dwell on that memory.

After a quick, steamy shower, Zen returned fresh and clean to his room.  It smelled like genitals.  Not exactly in an unpleasant way, but a faint lingering musk scented his bed, a subtle reminder of the taste he savored from Ivi's own fingers.  He dressed in a clean school uniform, awkwardly tucking his erection off to the side before hobbling downstairs for breakfast.  Maybe his parents wouldn't go into his room.  Or notice.  Or check his sheets, or the school uniform he wore yesterday, or-  Or he'd be in a lot of very embarrassing trouble.

As usual, Ivi didn't acknowledge his existence.  That bothered him this morning more than it usually did.  Her sleek fur gleamed, perfectly brushed, her coat more gray than brown, unlike his.  Fatigue lidded eyes only added to her air of aloof disinterest.  He shot nervous glances in her direction from the kitchen table, but she didn't join him.

On their way down the sidewalk towards school, Limra fell into step beside Ivi with Zen trailing behind as usual.  A cheery brightness wove through Limra's voice like morning light sparkling through dew drops covering the leaves overhead.  "Late night?  You look half dead."

"Because this is a godless hour," Ivi grumbled.

Limra laughed.  "I told you to come for a run with me.  Best night of sleep you'll ever get.  What did you end up doing anyway?"

Ivi groaned, shuffling along.  Then her shoulders straightened, large ears perking up.  "You know, you did come up in conversation."  Ivi leaned in conspiratorially, but let her voice carry in the crisp morning air.  "I had to have a particular talk with him."  She gestured over her shoulder at Zen.

Zen's tail stiffened, breath sticking in his lungs.  The shocked set of Limra's ears mirrored his own.

"You?  Had to have the talk?  With him?"  Limra's voice rose in pitch with each word.

Ivi snorted.  "Well, not the talk, but I had to let him know it wasn't polite to openly stare at someone's ass.  He was quite enamored."  Zen's ears flattened in distress.  Ivi had promised not to tell, his stomach transforming its contents into pure energy all at once in a great burning flare.

"Oh.  Oooh."  A faint blush rose in Limra's snowy neck.  Her hips danced.  "Well I do have an incredible ass.  I guess I can't blame him."  They both giggled.  Zen tried very hard to spontaneously combust.

"He had very fond memories of our walk home yesterday."  Ivi's darker fur hid any faint of a blush, but the tip of her tail twitched.

"Ivi!"  Limra covered her mouth in an attempt to hide her laughter.  Her swaying gait hypnotized Zen, and her tail twitched upward, intentionally or not, to lift the hem of her skirt higher.  Beautiful silky white fur covered her athletic legs, her skirt teasing the backs of her thighs.  Zen could almost imagine catching a glimpse of her panties, as unlikely as that was.  His own stride grew increasingly awkward.

"I'm just saying."  Ivi and Limra shared furtive, giggling glances.  They reached the outer neighborhood, a short empty side road without houses that led towards school.  A wooden fence blocked the sound of cars from a small park they would go to when they were younger.  Ivi's voice really did get quieter when she spoke again but gained a melodic tease.  "You know - I bet you could make someone's morning."

Limra's tail continued upwards, curling at its base to tent her skirt.  Then her butt lunged at him.  Zen crashed into Limra, who had stopped to gape at Ivi.  They both stumbled, and Ivi burst out laughing.

"S-Sorry!" Zen squeaked.  An angry swarm of bees filled his head, so embarrassed it hurt, his thoughts a useless buzz of empty panic.  Limra recovered gracefully.  If anything, Ivi was the closest to falling over, bent double and cackling to everyone's chagrin, laughter echoing through the peaceful morning and silencing nearby birdsong.

Ivi wiped tears from her eyes.  "I told you."  She snickered.  "You better be careful, Limra.  Your ass is going to get someone hurt."

Limra rolled her eyes before turning them on Zen.  They were beautiful, black but glowing the faintest ruby when catching the early morning sunlight.  She tilted her head inquisitively, the attention nearly making Zen puke.  He squirmed, torn between fleeing into the woods to live out the rest of his life alone with his shame, or throwing himself into traffic.  Unfortunately, few cars ever used this road, and the speed limit was 15, but he'd accept the excruciatingly slow death.

Ivi, mirth dimpling her cheeks, sidled up alongside Limra.  "Pretty obvious why he was distracted, don't you think?"

Limra smacked Ivi's arm playfully and tried not to giggle to little success.  "What's gotten into you?  You're awful this morning."  But her eyes dipped to the obvious little bulge in the front of Zen's pants.

Biting her lip, Ivi took each by the hand and dragged them around to the other side of the fence.  "Come on," Ivi replied to Limra's feeble protests.  Zen let himself be dragged off the sidewalk.  There were better places to hide a shallow grave, but he wouldn't complain.  At least they'd put him out of his misery sooner rather than later.

Ivi shoved Zen's back up against the fence.  "Well we can't just leave him walking around like that."

"He's your brother!" Limra protested, but she continued to eye Zen with curious amusement.

"And as my sisterly duty-"  Limra's snort interrupted her, but Ivi pushed on regardless.  "It's up to me to ensure he is not taken advantage by hot sultry butts."

Limra giggled.  "Sultry?!  If anything, my butt is the victim here!"  She turned to face Ivi in challenge, but her tail lifted once again, far higher than before, but so close to Zen, all he could see was her pleated black skirt blocking a view he so desperately wanted.

"Is that so?"  Ivi advanced, poking a finger into Limra's chest and driving her back.  The hem of Limra's skirt brushed Zen's belly.  A faint pink hue tinged the inside of Ivi's large ears.  "It wasn't flaunted recklessly in front of an innocent young boy?"

Limra balked in mock outrage.  "Certainly not recklessly!"

Another step forward by Ivi left Limra nowhere to retreat.  She stepped back, trapping Zen against the wooden fence, her tail hiked up so that her exposed panties pressed directly against Zen's crotch.  They both gasped in surprise, Limra tensing but not pulling away.

Zen barely dared to breathe.  His cock settled perfectly in the cleft of Limra's firm cheeks.  Even through his pants, the intimate heat of her body warmed his cock.  His hands clenched into fists at his side to keep from grabbing her hips.  The faint herbal scent of tea tree oil wafted from her silky whit fur.

Ivi took Limra's hips instead.  "Trust me, this won't take very long."  She grinned at Limra's wide eyes, and Ivi gently set Limra's hips into a swaying motion against Zen's crotch.  Her hips continued even after Ivi released her.

Zen whimpered in pleasure, his cock pressed firmly between her cheeks, their clothing an easily ignored barrier.  Warm pressure engulfed his slender cock, her butt grinding his length against his own soft fur and belly.  Zen quickly found himself panting, unable to escape the thrilling tension winding through his pelvis, his cock attempting to rise against Limra's butt to no avail.  A series of pleasured squeaks escaped his lips no matter how hard he tried to stifle them.

"Does it feel good?"  Limra didn't take her eyes off Ivi, but he knew Limra's soft words were for him.

Zen's entire body trembled.  Good didn't begin to describe how wonderful Limra's body felt against his, the slow hypnotic motion of her body robbing any semblance of control he could manage.  "Y-Yes but-"  The desperate whine in his own voice silenced him.  She didn't react to his response.  "Please I'm-"  Pleasure licked at his tiny balls, vibrated in the muscles right above his perineum.

Ivi leaned in and kissed Limra.  When Limra didn't pull away, Ivi grabbed Limra's face in both hands and pressed her fully back into Zen while kissing Limra in wild inexperienced lust.

Zen tried desperately to hold off the inevitable, but seeing his sister and Limra kiss, so close he was nearly a part of it, sealed his fate.  A girlish squeak whined from Zen as pleasure paralyzed most of his body.  The muscles between his hips, wound to the point of breaking, released all at once, freeing a storm of bliss that emptied his lungs of air.

Warmth blossomed into the fur around the tip of his eagerly twitching cock.  Limra's hips stilled, pinning his spasming length in place.  He imagined being inside Limra, her pussy squeezing his cock tight in her warm depths.  She had to feel him throbbing, his pelvic muscles fatigued by the time pleasure receded enough from his clouded mind for conscious thought to form.

Limra reluctantly pushed Ivi away, the two girls panting.  "I think-  I think he just-"  Limra danced forward, both girls rounding on Zen.

Without Limra supporting him, Zen nearly collapsed, his body utterly drained.  Unfortunately, adrenaline gave him a jolt of clarity as Limra clapped her hands over her face and Ivi grinned.  A small but very noticeable wet patch spread through his light gray shirt just above his belt.  The fur beneath felt slimy, the warmth fading to an unpleasant chill.

Limra squeaked and nervously smoothed the front of her skirt.  "I-It's probably getting late.  We really should be getting to school before-"  Without a backwards glance, Limra hurried around the fence and out of view.  Ivi gave Zen a wicked grin, then winked and chased after Limra.

Zen could barely walk, his cock sensitive even after retreating back inside its sheath.  There was nothing he could do about the stain.  If he returned home, he'd be late to school and have to explain to his parents.  If he didn't-

He whined, finding a napkin in his bag, but his cum smeared deeper into his fur, making more of a mess as he tried desperately to wipe it away.  It helped a little.  Sort of.  Zen hurried after the two girls, hoping the small wet patch on his shirt would dry by the time he reached school.