Blackmail on Holiday

Story by Omolaud on SoFurry

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A family of Kobolds home for the holiday. Oh what incestuous shenanigans will happen between a brother and sister when one is a pervert, and the other has no shame. But which is which? (hint: both are shameless perverts.)


I'd been so close to falling asleep, just at the cusp of unconsciousness where dreams tangled with reality. The noise that roused me was strange and unfamiliar, a low rhythmic huffing, but when that huff turned to a moan my eyes opened. They came drifting in through my door left ajar, from my sister's room across the hall. I had never before thought of my sister in that light, never thought of her as a sexual being. Now, now I imagined her with legs spread, fingers dancing between her thighs. Coming home for the holiday was nice, but this...

"Shit," I muttered as my groin swelled, slit bulged, and the tip of my phallus began to protrude. A trickle of moisture dribbled down to pool in my tail. I'd have to get up and wash, possibly even wash my bedding. "Damnit sis..." my voice too low, just a hiss of words.

She moaned again and I heard a soft, wet snuffle. The dog? Now more curious than aroused, I pushed my blankets aside, put feet to floor, then pulled on my boxers to keep the moisture contained until I could deal with it. I slipped out of my room and across the hall. Her door was open as well, wider than mine had been. In the dim light of her bedside lamp, I witnessed something I'd never imagined, let alone thought my own sister might ever do.

Upon her back she laid, with legs spread wide, just like I'd envisioned. Unlike my fantasy, the dog laid upon her tail, his muzzle buried between her thighs, his tongue deep in her sloppy vent. There was a towel under her rear, doubled up, and already soaked. Her hips rose and fell with each deep lick, her breaths came in ragged, desperate gasps, muffled by the pillow clenched between her jaws. I slipped back, then returned with my phone, and began to record.

It was incredible, I'd never imagined... never dreamed of such a sight! My own sister! She moaned again, louder, her hips clenched and bucked up and knocked the muzzle away. Blindly, face buried in the pillow, she reached and grabbed the large mutt by the collar and drew him over her. He was erect, his knot already exposed, tail high and full of wag.

Her hand reached under him and took his phallus. For a brief moment I had a perfect view of her vent, glistening, milky with lust, gaping slightly open to expose the bright pink flesh inside. My boxers tented as my erection emerged fully and a mess began to drool down my thighs. The fact that it was my sister somehow heightened my hunger. I felt like a freak, so sick and twisted, I wanted her. Instead I reached into my clothes and gripped my sticky member and began to stroke.

The view of her cloaca vanished as she guided the dog inside. He bucked and stabbed at her, then sank to the hilt. He held there for a moment and she let out a whimper that sounded painful. When he bucked again, her hips rose with, tied. I gasped aloud, my hips twitched, and I felt like I might climax on the spot. The pillow came down from her face and wide, desperate eyes looked up at me as the dog began to pound her with bestial lust. She moaned again, no pillow to muffle this time, her eyes glazed with sexual bliss, yet were full of shock and fear.

I stared back, the phone still in hand, recording. I stopped it and hit save, it uploaded even as she tried to rise. "Duse? Wha...?" She mumbled incoherently. The dog bit down upon her breast and forced her back to the bed. She yelped, but her hips jerked violently and thighs began to.

"So, you like being dominated by a dog?" I asked, mocking. "What a sick fuck you are..." what was I saying? I was getting off on it, I was the sick fuck! "He's going to cum in you, and I bet that's what you want, isn't it?"

She tried to say something, stopped, then turned her head away in shame as tears welled up in her eyes. "please, go away," she begged. Her voice quavered, with her crying, with her approaching climax.

"No," I replied low and slow. I dragged that sound out into a chuckle and stepped into the room. She looked back, blinked away the tears, and saw me. Her eyes lowered to the filthy wet boxers, tented over my cock and widened. "No, I don't think so Saiah, I think you and I are going to become very, very close."

Her lip trembled as she asked, "W-What do you mean Dusrea?"

I came to a stop at the side of her bed and reached down to place two filthy wet fingers under her chin. I smeared her scales with ventral fluids, then cupped her cheek, "I mean, dear sister, I recorded everything. If you don't obey me, if you don't do everything I say, I'll send it to everyone. You raped the dog on camera, and I got your face in the last of the shot. You're done for, bitch." The last word I said with emphasis as the canine snarled and pounded into her depths.

She flushed and let out a deep, heart wrenching whimper. I could see shame, humiliation, fear, and--lust, intense lust. She was enjoying this on more levels than physical. I pressed my filthy finger in, between her lips, and she ran her narrow tongue across it, tasting me. Her eyes closed. Relaxation spread across her even as her stomach clenched and body shuddered. She climaxed in silence, as she nursed on my finger. The stench of her sexual release filled the air as creamy lust and other mingled fluids pooled on her bed. The dog stiffened, snarled, then climbed off her as if to leave. He turned away, but then laid himself down upon the bed, rump to crotch.

"You just let a dog drop a load inside of you Saiah. You're worse than a whore, worse than a slut." She shuddered under my words as the dog's ejaculation pulsed into her. I pulled my hand back and jerked my boxers down. They fell to the floor with a wet plop and I kicked them off. She opened her eyes and met my gaze, still crying, still full of desire. "For your second act, you're going to swallow my cum too."

She grimaced as her eyes lowered to my waist, my vent gaped around the base of my erection, the tapered flesh, ribbed and folded, soaked in waste. Oral sex wasn't unheard of, but one did tend to wash well before exposing themselves to their partner's mouth. "P-please, no..."

I reached out again and curled my fingers around the back of her head and neck. She didn't resist, didn't fight, even as my member came to rest against her lips, "Yes sis, yes. You will, and you will love every second of it, because you and I both know how depraved you truly are. And... and you don't want the rest of the world to know." her mouth opened, she sobbed once, then pushed herself up to engulf me.

She gagged, hard as my flavor filled her nose and mouth. I pressed, and buried her face in my loins, her muzzle slid into the crease of my vent. "That's a good bitch, that's your place now," I purred at her. She swallowed, then gagged, then swallowed again as my erection swelled and slid past her tonsils, down her throat. I lifted a leg over, and knelt upon the bed on the other side of her face, straddling her, facing down towards her hips. The dog's knot still pulsed in her stretched, swollen nethers. Creamy animal semen pulsed around it and oozed onto her thighs. My phallus twitched, I couldn't help but moan, her hips jerked up in response.

My sticky passage drooled over her face as my hips rolled back and forth. I slid my engorged flesh across her tongue, between her tonsils, and over her lips with each buck. She licked in between the folds of my member, from the tip to the base of my urethral duct, then sucked hard and swallowed my filthy mess. It felt divine, my own sister cleaning my vent, she even began to nuzzle up into my cleft. I couldn't tell if she did it because I forced her or because she wanted to. It didn't matter, she served well in her humiliation.

My legs began to quiver and knees shake. Every swallow of her delightful throat left me breathless. Truth be told, I'd never received oral before and only mated once. I wanted to do it again, many many times. I stared down at my sister's squirming body as I practically sat on her face, and realized, I wanted to possess her. It wasn't enough, though the pleasure in the moment was exquisite, it wasn't enough!

Hips rolling and body trembling, I reached down to grasp her hips and pull her thighs farther apart. She complied, opening herself. The dog popped free as she did, his knot deflated enough to withdraw. He hopped down from the bed and began to lick himself with one leg raised. Between her thighs, animal sperm drooled from her depths. She had cleaned well beforehand and the mingled fluids were creamy off-white. I touched her vent ever so gently, spread my fingers across it and opened her. Pink flesh winked back at me as her hips jerked, a copious stream ejected and sprayed over the bed and onto the floor.

"Oh my, sis, would you look at that? All that animal cum..." I fetched my phone again from my shirt pocket and snapped a picture of her undertail with the flash on. Then spread her wider and captured the inside of her glistening passage. She heard the simulated click of my phone's camera and let out a whine as she squirmed. I mashed my hips down harder and buried her face inside. "Shut up and suck, bitch, you are mine now, all of you, and I'll do with you as I please!"

She nodded her head faintly and spread her legs the rest of the way and raised her hips with a twitch of her tail. I touched the video record button, then pressed my fingers inside of her, spread them, and watched the dog ejaculate gush from her depths. She moaned and writhed under me, more poured free. Before long her gaping cloaca was filled to the brim with dog seed. I swished my fingers back and forth, sloshing. I smeared it across her thighs and tails, painting her lower half for the camera. When she fell back into orgasm, I stopped. She fell short of her climax, and groaned into my vent with frustration.

I tapped the camera off and uploaded that footage as well, then tucked my phone away. "Fucking hell sis, you're good at that," I told her as I felt myself lose control. The crest came, my whole body prickled with anticipation. My head fell back, stomach clenched, thighs sinched upon her cheeks, and a lusty groan escaped my throat. I couldn't believe it, I was about to cum down my own sister's throat! "I'm gonna... gonna... Uhm." I never finished my sentence. My gonads clenched, stomach rippled, vent swelled and everted over her face as my erection swelled to rock hardness. The ribs upon my length bulged and plugged her throat as my urethral duct closed so tight her tongue couldn't pry it open. My whole body went still as stone. My breath halted.

Saiah's moans were cut off sharply as I climaxed, her breath blocked in her lungs. A few seconds later the first intense ruse passed through me and into her. I'd never cum so hard in my life as I did down my sister's throat. She swallowed and swallowed, then gave up entirely and just relaxed as her throat filled faster than she could drink. I collapsed forward as I spent myself, and found my face mashed into her sopping wet lap. For the moment I didn't even care that dog cum and her fluids were getting into my nose and mouth.

When at last the pleasure faded from ecstasy to trembling bliss, I inhaled. The incredible stench of her well used cloaca left me shuddering with mingled revulsion and excitement. I'd smelled her while standing at the door, and certainly riding her face. I'd also smelled the coppery tang of the animal's issuance faintly, but nothing like this. I jerked back and sat up upon her muzzle, then grabbed her discarded pillow, damp with her saliva, and tried to wipe the mess away. The stench clung though even after my face began to dry.

Between my thighs, she swallowed madly and milked my cock for all it was worth. Still swollen enough to shut her throat, she had to be desperate for air. I didn't pull away. I cleared my throat, swished my tongue, then spat the foulness from my muzzle, right onto her tail base. She shuddered hard and actually arched her back!

My gonads continued to pulse through the fading orgasm, but my breath came easier and my body relaxed. At last my ribbed flesh began to deflate, not quite flaccid, but she was able to draw a breath as well. Then she drew another, pulled between the corners of her lips, followed by a series of harsh coughs and gags. I didn't rise however, just kept her nose buried in my bowels. I felt so... so powerful. My older sister worshiping my unwashed vent--and loving it. I could do anything I wanted, she was mine, all mine.

Saiah swallowed again and began to suckle at my softened flesh. She cleaned the creamy mess from her mouth, circled me with her tongue, then began to dredge the ejaculate from my folded duct. I shuddered hard and my breath caught. My organs clenched again, and another trickle splattered into her open mouth. She cleaned once more, then a third and fourth time until my oversensitive body was drained. Still, I did not rise.

I stared down at her filthy crotch, animal sperm had started to dry upon her crimson and green scales. I'd finger painted her with yellow-white whorls. I suddenly and very very deeply wanted to be inside her womanhood, I wanted my seed filling her womb. Yet, I was spent.

I grinned to myself and slowly, ever so slowly, extracted my member from her throat and looked down. Her face was filthy, smeared all the way past the crown of her head with milky-yellow cream and waste.

Her eyes opened, unfocused. Her gaze settled nearly on me, perhaps a little behind and beyond. "Duse..." she breathed out the syllable, then licked her waste smeared lips clean and shuddered. She lay there under my parted thighs, my penis drooped, flaccid but not yet retracted, across her cheek. She turned her head away and trembled. "Why?" she asked at last.

"Because you are mine." I told her the truth of my heart. My member twitched at the words, my chest tightened. "I saw you, saw who you really are. In that moment I decided I wanted you, and you gave me the perfect chance to claim you."

She shook her head in denial, tears began to roll down her cheeks once more to leave cleaned trails over filth smeared scales. "No! Please, delete the pictures Duse. If anyone at college ever found out I'd..."

"You'd be ruined. You might even go to prison," I agreed. She trembled and those pure tears poured faster. She was so beautiful like that, tormented. A sob broke from her parted lips, then another, until she was crying uncontrollably. "That's it sis, that's a good bitch. You know your place, don't you." I cooed at her, and to my surprise and pleasure--she nodded. "I'm not so sure you do," I teased.

"W-what do you mean?" She blubbered.

I slid off the bed and stood before her. My cock rose to attention once more, a good fifteen inches long, sucked clean by her luscious mouth, but mucous and filth had already begun flowing down my thighs again from my vent held open by lust. My everted cloaca spread like swollen petals of a flower and stuck to my inner thighs. I circled her, to the foot of the bed. Her mess had spilled onto the floor, my toes squished it into the carpet.

I crawled back onto the bed, between her parted legs, and knelt over her. "You are mine, inside and outside. Mind and body, mine. Those videos? The pictures? I'll make sure that they will be released no matter what. Doesn't matter if you destroy my phone or even kill me. Unless you do anything I want, surrender to me wholly... Understood?"

"Y-yes," she agreed between her sobs.

"That's Yes Master." She shuddered, her vent swelled open again. "Fucking hell, Saiah, you're loving this, you WANT this."

She shook her head no, but her depths darkened and nethers bulged in welcoming heat. At last though, she spoke again, "Yes Master... yes." then at a whisper she added, "I love it."

I took her then and there. No more words, no more teasing. My phallus was so erect that the ribs were standing tall. She arched her back as I rammed home and howled. She was hot, tight, and sopping wet. I didn't care that I was plowing into dog cum, or that she was my sister... No, that's not true, I LOVED it. I took her like the beast she had laid down for. I rutted her like an animal, the memory of the dog flooding her just made it that much sweeter.

Her hands rose and touched me, the first time she had dared to. Her fingers curled around my fore arms then sought upwards until her fingers laced behind my neck. She clung to me, pulled me down, and pressed her lips to mine with a hunger nearly as desperate as my own. Her filthy tongue penetrated my mouth and shared the sour musk with me. I didn't mind. I began to suckle upon her moist tongue and curled my arms under her back, to clutch her.

Mine, you are mine. The words repeated through my thoughts, a chant to count each thrust. Her passage hugged my shaft and milked it. Her vent squeezed my base and melded against my own swollen bowel, mashed together in a wet filthy kiss. My thrusts grew shallow and our tails entwined, trapped sex to sex. She slid a hand down my back and gripped the base of my spine, just as I peaked again. Spent already, my organs churned and pulsed, but only a thin trickle bubbled along my swollen closed duct. I felt just the faintest few droplets fall into her swimming womb, but it was enough for me, enough to satisfy the bestial hunger.

"Mine," I said aloud, then again, and again in time with my violent yet impotent throbs in her passage.

She nodded against my lips, tears still falling, but her sobs abated. She whispered back at me, still clinging, "Yours Master. I am yours. Thank you." I didn't know what she was thanking me for, I'd just raped her. She tucked her sticky face into the crook of my neck and kissed at my collar bone, "Thank you," she whispered once more.

I tried to find the words to ask her meaning. They did not come. She clung like a child to a teddy bear. Her depths hugged me tight and pulsed with the occasional clench. My erection remained, held snug and warm in her body. I could have fallen asleep that way, could have spent the rest of the night in her arms. Would have even, but... "I need to pee."

She nodded and squeezed me with her arms, cloaca, and tail, mashing our vents together. "I am yours," she repeated.

I raised my head and looked down at her. Eyes closed, lips parted, a smile in the upturned corner. "You are depraved," I told her. She nodded a tight nod and huffed her assent. "Mine," I agreed.

It took a moment. It was not something I'd done before, or even thought of. Her swollen, messy folds pressed hard against mine, our vents met entrance to entrance, still pierced by my yet swollen phallus. It took a moment, but I managed. That moment later my bowels relaxed and shifted with a watery gurgle, a moment later I was relieving myself into her. She shuddered but did not recoil as I released. Urine blasted up into her, her cloaca gaped around my cock, then gurgled it's own sound as my filthy enema forced its way into the depths of her bowels.

She made a little whimpering noise as her guts bloated. Already full from one end, her stomach swelled against mine, hard and tight. I held myself against her as I clenched and pushed, wringing every last drop of waste from my body and forcing it into hers. "Now hold it," I told her firmly, I felt her clench down hard on me. Then at her nod I began to withdraw. Both of us trembled at the sensation. My ribs caught and dragged against her depths, an inverted mirror of my erection. We fit together like a key in a lock and it was agony just to leave her. But at last I pulled free and knelt above her on hands and knees. Our tails remained tangled, but limply, comfortably.

"I... I'll delete the videos if you really want, sis." I told her, but secretly intended to keep a copy for my own use.

She shook her head and opened her eyes again. Those pale green orbs stared up at me with a mixture of confusion and--love. "No Master. I am not a good slave, I will not obey you if... If you do not have power over me." Her lips curled into a smile most timid yet beautiful. "I want you to record more, much more. Maybe hide my face and sell them, humiliate your sister-bitch."

Her stomach gurgled loudly and she blushed. "I think you need to relieve yourself," I pointed out, then climbed carefully to my feet and stared down at her bloated stomach and swollen vent. The camera came out again, I hit the record button, and panned across her form. She was beautiful and filthy, her bed was soaked through and likely stained, and her scales were covered in mingled mess. I pointed toward the door and she nodded.

I stepped back as she sat up, then rose unsteadily to her feet. Her knees shook, and her stomach settled lower. Her hands snapped down to grab at her undertail, she pinned the folds of her cloaca shut with fingers and tail. Even so, a rivulet of waste and cum dribbled free to splatter upon the floor. I recorded it all, even her mortified expression. I pointed again, and she hobbled out of the room as I followed. A trail of milky fluid followed behind her on the carpet, from bedroom all the way to the bathroom. She began to sit on the toilet, I stopped her with a shake of my head then pointed to the shower stall. She looked up at me, then toward the shower, back, then down at her feet and obeyed. In she went, and I closed the glass door behind her.

I paused the recording, "I want you to bend over, lift your tail, and press your vent against the glass. Look back at me and the camera from between your legs. I want to see your face as you let go."

She gave a curt nod, "Yes Master. I'll give you a wonderful view."

I hit record again and watched her over the edge of the phone. She did just as instructed. She bent double, raised her tail high enough to drape the tip over the top of the stall, then backed up against the glass and mashed her swollen cloaca into it. I had a clear view, beautifully clear. As she relaxed, she opened against the glass and I could see through the cloudy mingled fluids into her bowels. Then as the pressure built it began to flow from the right and left corners of her cleft then run in wandering rivulets down the glass. Her thighs were drenched, her face got splattered, and as I watched she began to lick the waste off the floor of the shower.

She drained herself completely before me, then remained in position. That swollen vent pulsed in time with her heartbeat, as hungry as ever. I paused the recording again, then told her, "Masturbate for me Saiah, show me how much of a slutty bitch you are." She began to finger herself even before I hit record again. It was amazing to watch, better than any porn. My own sister putting on a show for me? Her brother?

My lust built again and my member began to engorge. I ached fiercely within, but the power I had over her and her willingness to please were enough to drive me wild. I paused the recording, set my phone on the sink, and opened the shower door. She stumbled a little, but my hands caught her hips and steadied her, just long enough to press my swollen ache back inside where it belonged. "Gods above sis. I wish we had done this years ago... You are wonderful."

She unbent herself and braced her hands against the opposite wall of the stall, then looked back at me, "I wish you had too, Duse. I used to touch myself while listening to you masturbate." She then looked away and I curled myself over her, possessively. She told me, "I left my door open, hoping you would hear me at night, hoping..."

Mother cleared her throat behind us. The bathroom door was still open. I looked back at her in her night gown. The look in her eyes could have melted steel. "Fuck!" I yelped and stumbled back. My swollen ribs caught in her depths and didn't pull free, she fell with and pushed me off balance. I landed upon my tail, she landed on top of me, my cock sank into her as deep as it would go with a sharp stab. I climaxed again, the third time that night, and spent another handful of fertile sperm swimming into her depths.

Saiah, on her back on top of me, stared up at our glaring mother. "H-hi Mom," she mumbled through horrified embarrassment. "Did I wake you?"

"Did you WAKE me?" She retorted. "Are you two stupid?"

Saiah answered with a giggle of mortification, "Uh, yeah, he fucked me stupid."

I just shuddered and clung to my sister, face buried in her neck, hidden. Every throb contained another frail load of ejaculate, and something about being caught just made it all the more intense. At last, my chest relaxed, and a loud earth shaking moan shuddered from my throat. Another powerful throb followed by another pathetic trickle; I bred my sister before our mother's very eyes.

She turned away at last and left us, but yelled back, "You idiots better clean up after yourselves. Fuck. If you wake me, so help me I'll throw you out on the street to fuck in the alley like a couple of rats."

Saiah looked back at me, I looked up at her. She grinned sheepishly, I grinned back like I was a teen again. "I love you," I told her.

"Love you too little brother... Master," she corrected herself.

I nodded firmly, then commanded, "You're coming home with me, moving in."

"Yes Master."

"And I'm breeding you."

"Yes Master."

For a moment I was silent, unsure of what to add. I finally told her, "Best holiday ever, tails down."

Her vent pulsed against my lap, her cloaca clenched on my erection. With a husky voice, she agreed, "Yes Master." The dog then trotted in and began sniffing at the wet trail leading in. He lapped at it a few times, then huffed and trotted over to us and sat down. His prick was poking out again, just a bit, like a tube of lipstick.

"And we're taking that mutt home with us so we can make plenty of movies."

Saiah climaxed, hard, like lightning from a clear sky. My sister came, howling as she did, and milked my aching spire. She cried out as the waves of pleasure washed over her, loud enough that Mother stomped on the floor above, "Yes Master!" Such a depraved little bitch. I hugged her tight to me, cuddling upon the bathroom floor. The dog just twitched his ears and cocked his head.