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Series notes: This story crosses into a few different categories. It's primarily a Sci-Fi/Fantasy piece. However, there are several scenes involving incestuous sex - which is why it is categorized the way that it is. ~ This piece is part of a series. The story will make more sense if you read it from start to finish. ~
All of the chapters in the story-chain will be submitted at the same time and should appear every day or so - depending on what the admins decide.
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~~~ Monday ~~~
No sooner was my door locked than I felt the rift forming. In moments, Malady was stepping through - wearing the guise of the person whose room was just across the hall - my sister - Melissa. She was gloriously naked. At the sight, my penis began to grow. She giggled at me - an echoing dual-sound that was half the voice of my demon princess - and half the voice of my older sibling.
She turned and bent over - pushing her rounded ass out. She looked over her shoulder at me - nibbling her bottom lip.
"Oh, naughty little brother ...," she purr-hissed.
Her puckered little asshole was pristinely pink. Below that, her pussy lips were glistening - and spreading open like a flower. She reached a finger between her legs, inserted the tip just far enough for me to moan and then stopped. She dragged that fingertip down her gash - between her lips - her gaze fixed on my eyes as I watched - transfixed. Embers of unbridled lust burned in my sister's eyes.
Slowly - millimeter by millimeter - her finger slid into her pussy - just far enough for her nail to disappear. She gave a little whimper that had my cock weeping a drop of pre-cum - salivating with desire to be that finger.
Malady/Melissa whispered to me. It was my sister's voice - but with the rumbling, echoey timbre of command ...
"Fuck me, Mal ..."
I'm sure that Malady knew she didn't need to command me. My penis was being drawn to my sister's cunt like the thing had the intense gravitational pull of a black hole.
I staggered forward - my body no longer responding to what I told it. I raised my hands enough to catch myself before I fell - gripping her ass to balance myself. A feral growl rumbled from my chest as my achingly hard penis slid inside of my sister's slippery twat.
Melissa's body would have never accommodated my altered penis. Malady, however, made sure that it was a perfect fit. My sister's pussy took all of my cock - and held it tightly within its grip.
I slid out of her only far enough for the very tip to be the only thing that still connected us - and then I slid back inside of her again - slowly - savoring every exquisite inch of her grasping channel.
"My little brother's cock fills me so good ...," she hiss-moaned.
Somehow, I felt my penis swell even larger than it already had been.
In and out - slower than any time I'd fucked before this - I dragged my cock in and out of my sister's cunt. It was as if I could feel every single muscle - and I never wanted it to stop.
Malady, however, grew impatient. As I drove fully within her again, she set her pussy to sucking me. My fingers dug into my sister's ass - turning white from the force - as my demonic lover ripped the orgasm from my body - tearing it from my control.
"Yes ...," she hiss-moaned, as jets of my seed began firing inside of her.
When my penis finally stopped erupting - my balls as dry as a desert - she giggled.
"You cheated," I snarled at her.
She pulled off of my withering prick, spun, dropped to her knees, and sucked me down her throat. Again, my sister's body wouldn't have been able to handle my length or girth - but Malady adjusted things to make it work.
I ran my fingertips over my sister's brow - into her fine blonde hair. For just a moment, I wished that this was really her.
Malady pulled off of me and stood to her feet. By the time I held her in my arms, she was back to her natural form. Where once I had been repulsed and afraid of her, her face and form now filled me with longing, desire, and contentment. I wasn't really sure how it had happened - or when the transformation had taken place - but - damn it - I was glad.
She smiled into our kiss.
"You really have a thing for your sister, don't you, my pet?" she asked, her voice filled with mirth.
"I think that's just your wicked influence," I teased.
She giggled and shook her head.
"My blood may have magnified it a bit but that's all you, lover."
Her arms tightened around my neck and her hungry kisses prevented me from arguing any further.
After a few more kisses, her hand slid down my body. She wrapped her fingers around my ball-sack and cuddled them as she gazed into my eyes. I felt them begin to fill once again. I chuckled at her.
"Haven't you had enough for one day?" I asked.
"Never ...," she hiss-moaned. "My kind is voracious by nature - but our mutual bond has made me insatiable for you."
I gave her another quick peck as she moved us towards the bed - shoving me onto my back and then bodily dragging me to the center.
My human body had been just over six feet tall. Now, I was possibly a touch over seven feet. Malady was about the same. My body was also a good bit bulkier than it had been before. I worried about whether or not my bed would be able to handle the two of us fucking on it - especially if Malady got a little crazy.
As my demon lover worked to get me back inside of her, I groped her rounded breasts and tweaked her pebbled nipples. They were easily the size of my fingertips. I leaned up towards her chest, caught the right one between my lips, and sucked.
"Yes ...," she hissed.
As my penis slid inside of her, I sucked a little harder - slightly overwhelmed by her voracious demon twat. Already it was grabbing, pulling, sucking, and stroking.
She slid me all of the way inside and then claimed another load of seed from me - her eyes igniting again. Her body soaked it all in.
"Fuck me ...," she said.
Instead of a command, this was a pleading request.
I rolled her onto her back. I began fucking her - slowly. Her pussy was still trying to devour me and I had to focus on dialing down the stimulation so that I could concentrate on my task. I began again - moving a little faster.
"More ...," she begged.
I felt a part of her slide under my balls - across my taint - and nestle against my ass-crack. She pressed her tail against my ass - pushing me in a little deeper - making my thrusts a little more powerful.
I didn't remember her having a tail but it felt right - and it made my balls churn - and I had to focus once again on ignoring what her body was doing to me and - instead - concentrate on what I was trying to do to her.
"Faster ...," she moaned.
She was squirming now. I studied my demon lover's face as I fucked her - watching for the signs that told me what she liked the most - the things that made her body respond - almost out of instinct.
I found the pace that she liked the best - and the angle - and the depth. Soon, her body was trembling beneath me. She was close.
"Mal ...," she begged.
I pressed my lips to hers and kissed her as she came on my cock. Her eyes flared again. I slowly continued fucking her as she rode out her release.
After a minute or two, she focused her eyes on mine.
"Cum ... please ...," she asked.
I slid all of the way inside of her. I removed the safeguards that I'd put into place to neutralize my body's response to hers - and I let her claim her reward.
Her arms tightened around my neck and she kissed me forcefully as she welcomed my seed into her body once again. The force of the explosions - as the ejaculate rocketed from my body - was far harder than anything that I had experience up to that point. I felt weak when the eruption finally finished.
She snickered at me, hugged me against her body, and kissed me tenderly.
