It Was in the Genes - Cover

It Was in the Genes

Copyright© 2024 by Kin Asdi

Chapter 1

Romantic Sex Story: Chapter 1 - What do you do when your sexy sister, Cindy, is in love with you? Casper, a true nerd at heart, finds out she is adopted and realizes he has fallen for her as well. The dilemma of their ‘forbidden love’ forces them to find a bearable solution. Will they succeed to have a happy life after all?

Caution: This Romantic Sex Story contains strong sexual content, including Ma/Fa   Fa/Fa   Consensual   Romantic   BiSexual   Heterosexual   Fiction   Brother   Daughter  

I was sweaty from splitting wood, and I looked satisfied at the large pile I had gathered in the wheelbarrow. It was enough for the evening to come. My arms trembled a little when I pushed the heavily loaded barrow to the back of the house. My dad gave me the thumbs up when I parked the wood in front of the patio door, and he mouthed ‘Thank you’.

It was the only Christmas Eve chore left I had to do, and I liked it as well, because it made my body feel better somehow.

Happily, I stepped into the kitchen where mum was busy preparing the Christmas Eve’s traditional dish. The huge turkey was still in the oven with a wonderful brown color already. My mouth watered because of the delicious smells that lingered throughout the house by now.

“Hurry up, Casper,” she said while she frantically stirred in a small saucepan, “your sister should be out of the bathroom by now.”

I huffed, knowing Cindy’s elaborate shower sessions could take forever and they seemed to get longer every month. She was a real girly type but still I couldn’t understand why it would take her almost an hour to take a shower and get dressed.

I rushed up the stairs and as I stepped into my room, I threw off my clothes, ready to have a nice warm shower. I decided to keep on my briefs, just to be sure I didn’t bump into Cindy completely naked.

I hummed a happy song when I stepped into the bathroom and stopped instantly when I saw Cindy standing in front of the large mirror, painting her lips with a small brush. She looked at me with piercing eyes via the mirror and commanded, “Stay, and lock the door.”

My brain was fried for a moment while I looked at her amazing body. She was only wearing a dainty garter belt that kept her seamed stockings up, her smooth legs and her bottom’s delicious firm globes perfectly filled the matching panties. I could see her large pert breasts via the slightly misted mirror, and it confirmed what I had already concluded a long time ago; her large nipples looked amazing.

Dumbfounded, I let my hand slide over the door’s smooth surface in search of the lock. As soon as I found it, I made sure nobody could barge in.

“Would you mind checking the seams of my stockings?” she asked with a sweet voice, as if it was a mundane task for me to do.

It took me a few moments before I decided to do what she’d asked. I had never seen her like this and wondered what had happened. Speechless, I dropped to my knees to check her beautifully toned legs and with trembling hands, I carefully straightened the slippery fabric. It was strange yet extremely arousing to roam my hands over her legs. I felt my briefs getting too tight to accommodate its content with each caress of her legs. It didn’t take much time but as soon as I was done. she turned, slightly bending over me. My nose was almost touching the lace fabric of her sexy undies and to my surprise I could see a wet, dark patch, indicating she was probably as horny as hell.

Apparently, she had reached for her bra because as I looked up, I saw the same black lace fabric cupping her nice tits and I couldn’t believe my ears when she said with a commanding voice, “Help me with the bra.”

Completely stunned, I stood slowly, my eyes following the pleasing curves of her body. With disbelief I stared at her pretty face that had a sweet smile. Ever so slowly she turned, revealing the loose dangling straps of her flimsy bra. It took me a few moments to straighten the straps before I could align the ends.

“Use the last row,” she said softly while I wondered what to do. It was surreal when I clumsily slid the tiny hooks into the minuscule rungs.

Without acknowledging my effort, she stepped into a super sexy dress that I hadn’t seen her wearing before. She shimmied the shiny fabric over her hips and with an almost regal move she slipped her arms into the sleeves. The dress flowed nicely over her hips and ended just below the lace tops of her stockings.

“Zip?” Her voice echoed in my bedazzled brain, and I numbly did what she asked me to do. It was a mesmerizing scene, seeing her shiny skin disappear when I slowly moved the zip upwards. I saw there was a little button at the top of the dress but before I could say something, Cindy moved her glossy black hair away, giving me easy access. Still, I had trouble believing what had just happened and my heart thumped in my throat as she dismally stepped into a pair of high heels. Her elongated legs made her look amazingly sexy.

She turned; her dark blue eyes were now level with mine. The subtle make-up made her look stunningly beautiful, and her dark red lips were formed into a naughty smile. I gasped when she pulled me into a hug, deliberately pushing her hips against my massive erection. I loved to feel her soft breasts pressing against my naked chest, but I also knew it was oh so wrong.

She pulled away and gave me a quick peck on my lips. She whispered, “Thank you.”

Before I could say anything, she turned, unlocked the lock, and strutted out of the bathroom, leaving me alone.

Utterly stunned, I stared at my reflection in the mirror while I tried to fathom what had just happened. I had the opportunity to ogle her amazing body on several occasions but this time it was mind blowing and I knew she would be in my dreams forever. Only then I saw the smear of her lipstick on my lips and that prompted me to get into the shower.

The warm water felt amazing and as I closed my eyes, I imagined Cindy being in the shower with me. It didn’t take long before I found my release. Still, it felt strange imagining having sex with my sister.


Christmas Eve started off a little strange because of the steaming hot adventure with Cindy but soon everything seemed to settle to a somewhat normal dinner. The top part of her dress wasn’t that revealing; in fact, I was used to seeing her large chest, which strangely enough, put me at ease. After dinner we watched a movie, which was an old tradition that our grandma introduced when she was still with us. The women were sitting on the big sofa, and I shared the two-seater with dad.

During the boring movie, I glanced at my sister who was hooked on the screen. I liked the way she put her legs under her. It was a thing she always did that put me at ease again, for now. I knew I had to broach our little escapade with her someday. We were very close when we were young, but it gradually changed when we reached the age of puberty. Now we were in the last year of high school and just a day ago, I’d become an adult: the same as Cindy.

I never managed to have a girlfriend, simply because I was just too shy. Cindy, however, was the hottest girl in school and I was sure she had lost her virginity years ago. There was always a boyfriend next to her; although, she had recently broken up with the last sleaze ball, which I was actually happy about.

Then it dawned on me; perhaps Cindy had withdrawal symptoms!

Suddenly, Cindy turned her face to me and noticed I was staring at her. She instantly looked down as if she was embarrassed but my heart skipped a beat when she looked up, smiling warmly. She winked once and then started to watch the movie again, without even blinking an eye.

I got up from the sofa and walked into the kitchen to get a refill of my drink. I sighed deeply, not knowing what to make of the situation. I couldn’t get the image of her amazing body out of my mind, and I cursed softly because my cock got hard instantly when I remembered seeing her magnificent tits. I desperately tried to keep my horny feelings at bay as I readjusted my private parts in my trousers.

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