Our parents got married when I was 14 and she was 13. From that point on it was pure chaos. Although I spent most of my time at my mother's house most of my weekends were spent with my dad, my step mom and my step sister. We were like oil and water in the beginning, fighting with pretty much every breath we took. Though after awhile, as we started to grow up and the marriage stopped being so new things changed, albeit slowly at first.
At some point, although to tell you the truth I don't really remember when, I started to notice that she was becoming a woman, and that I was well on my way to becoming a man. Her mother was a very busty woman, and she took after her mother in this respect, starting to develop early and well. Although she used to sit in my lap and hang around my neck I had to put a stop to that as the side effects of close contact were… uncomfortable.
As the years went on we developed a strong relationship, and in fact became all but inseparable during our high school years. Although I still remember, with a strong twinge of jealousy, when she got her first boyfriend, though I was utterly confused by the emotions I felt.
But things really changed the day I walked in on her in the bathtub. Although, as I commented earlier, I had noticed the changes that puberty had wrought on our bodies this was highlighted two weeks after her 18th birthday. While our parents were out shopping we had opted to stay home, she in her room talking to her boyfriend, and I in my room playing on my xbox. During a break between rounds I hopped up to use the restroom, rushing down the hall. I should have paid attention to the noise of the radio, a telltale sign that she was using the bathroom, but in my haste I burst in on her. I was lucky, the door opened soundlessly and the noise of my surprise was obscured by the radio playing nearby. Shock made me freeze in my tracks, my eyes stuck to the sight of her exposed flesh. My earlier assessments of her growing body had underestimated her if anything. Twin globes of soft pale flesh greeted my eyes. The starkly delineated lines where her swimsuit had protected her body from the sun's harsh glare added a sense of the erotic, as if it highlighted that this was a part of her body that few others ever saw. She failed to notice my entrance, enraptured as she was with the process of cleaning her body. Soft mounds of white, soapy bubbles filled the tub, obscuring the lower half of her body and lending the delicate smell of the lavender body wash she preferred to the still bathroom air. I watched, caught still like a deer in the headlights, as she ran a sponge gently over her breasts, cleaning away the soap that had gathered there before running her hands over her body with an almost inappropriate amount of pleasure.
At once my cock sprang to attention, demanding that I free myself from the entrapment that her body had wrought upon me and take her in a way most biblical in nature. Instead I backed slowly from the room, carefully closing the door behind me so as to remain undetected. The rest of the day I spent alone in my room, the image of her exposed body haunting my every waking moment until I capitulated to my baser instincts and masturbaited, at last spilling my cum with the sight of her perfectly formed breasts filling my mind's eye.
From that point on I was lost, I knew that something had been started when I walked in on her that could not be stopped now, I had to possess her or I would surely go mad with longing. What I failed to see, and indeed what I was utterly oblivious to until she informed me of it later, was that I had not been so sneaky as I believed when I walked in on her. Not only was she aware that I had come in, but she had positioned herself so as to give me the show that so captured my imagination. I was ignorant of the fact that she longed for me as much, if not more, than I longed for her.
Although I had long ago set out on my quest to claim my step-sister it was not until years later that I was able to realize my quests completion. In the intervening years we both loved and lost, but our relationship continued to grow closer, and even withstood the separation of our parents as a testament to its strength.
It was the summer of my 25th birthday when I lucked into the fulfillment of my hearts desire. To celebrate my birthday my sister and a group of my friends headed out to the beach. We split a small cabin on the beach, each taking separate rooms while our friends rented a larger cabin nearby. Because they thought of us as siblings no one in the group second guessed us sharing the cost of the cabin. After several days of trying, and failing to catch her in various states of undress I finally resigned myself to simply being alone. It was at this lowest point, drunk on a mixture of my depression and a cheap bottle of whiskey that she found me.
"Hey, what are you…. Jesus, you smell like the bar room floor! What the hell are you drinking?" she asked wrinkling up her nose in mock disgust. As it so often did a smile hid at the edges of her lips, tempering her rebuke into playful softness.
"I don't know…" I slurred drunkenly "I found it in the cabinets, tastes like paint thinner but it seems to be getting the job done." I finished. I wordlessly offered her a swig from the mostly finished bottle, and after sparring the bottle a skeptical look she obliged me and took a long pull. I laughed as she sputtered and fought back the urge to gag on the foul concoction.
"Why are you drinking this swill?" she asked, handing me back the bottle which I allowed to lean haphazardly against my legs.
"Trying to forget…" I started.
"Trying to forget what?" she asked curiously. She gestured at the bottle again and I obediently handed it back to her, watching her as she took another long pull, this time managing not to choke in the process.
"You…" I said. If I had been even an ounce more sober than I was at that moment I never would have responded so honestly. The whiskey loosened my tongue and filled me with a devil may care attitude that I was sadly lacking in my sober life.
"Me…?" she said carefully. Although I did not take note of it at the time her voice was filled not with shock or disgust, but with a careful twinge of hope.
"Yes you… I want you, I have wanted you for years…" I slurred. At this point some part of my mind realized what I had said, who I was talking to, and a rush of adrenaline filled my body chasing away some of the drunken haze that clouded my mind. But it was already too late, the words had been spoken and they could not be taken back.
She looked at my in silence, her eyes finding mine, her face set in an unreadable mask as she searched my face for any hint of humor, for any sign that I was joking. She found none.
"Then instead of sitting there and feeling sorry for yourself, why don't you come and get me?" she asked carefully.
My mind stalled as it attempted to process her words. I was sure that I had misheard her, some effect of the whiskey and a mind filled with wishful thinking.
She smiled at me, and started to undress. It was clear to her in that moment that she would have to be in the lead in this endeavor until my mind cleared enough of the alcohol's embrace to function again.
She slowly pulled her shirt up, reveling in the shocked and hungry expression that filled my face. The taught tan lines of her stomach slowly came into view as she pulled the skin tight shirt up over her breasts and then off completely, tossing it nearby on the floor. She stood revealed in the late afternoon light, the smooth lines of a light pink bra drawing in my gaze like iron to a loadstone. She turned and swayed, partly from the alcohol she had consumed, and partly to put on a show. Her every movement was mesmerizing and in that moment I could not have taken my eyes off her if the house had been on fire. Every neuron in my brain ached to see another inch of exposed flesh, and after teasing me for only a moment she continued with her performance.
She turned around, displaying her firm, tight ass, an asset which she had won through long hours of hard work and thousands of squats. She slapped her ass saucily, a playful grin filling her face as mine was twisted by the primordial force of lust. She slowly pulled down the pants, which were every bit as skin tight as the shirt she had already shed, and revealed a matching pair of pink panties. I was told once that if a girls bra and panties match, that it was her and not you who decided to have sex that night. That thought trickled through my brain and I wondered for a brief moment if she had come to my room with the intention to seduce me no matter if I was drinking or not. However this brief grasp on lucidity was obliterated by the continuing show my step-sister was putting on in front of me. She swayed in place, her hips writhing back and forth to a silent melody which only she could hear. The effect was entirely hypnotic, the perfect lines of her body capturing my eyes and snared my mind.
At last she reached behind her back and with a deft snap of her fingers freed the clasp on her bra. With one smooth motion she pulled the soft cotton garment away from her body and exposed the breasts which had haunted my dreams for years on end. If anything the intervening years had filled her body out more, taking the flower of youth fresh into adulthood, that she had been when I saw her last, and lending it the rich fullness of maturity. The same lines that had adorned her breasts the last time I had seen them still left their mark upon her tender flesh. She watched my eyes as she stood before me exposed, searching my face for any sign of disappointment or rejection, but finding naught but lust and burning desire. She shed the last of her clothing, allowing the small pink panties to join the bra on the floor of the cabin. She closed the distance between us and placed herself in my lap, a gesture that recalled the times when she had done this in our youth, but this time in a way much different. She leaned towards me, her face turning up towards mine and our lips touching softly. The warm, wet presence of her tongue intruded into my mouth before darting back to the safety of hers, followed swiftly by my own. We stayed in that embrace, lost in the sensation of our bodies. My hands found the soft, supple flesh of her breasts and she moaned into my mouth as my fingers played skillfully with her nipples, bringing them swiftly to full arousal. My other hand drifted down between her legs, which she obediently spread for me.
My fingers penetrated her silken vulva with the ease that would only have been possible if she was at peak arousal. Slipping inside her cunt like a hot knife through butter. She moaned softly, biting her lip to hold back her desire. As my index and middle slipped inside of her I curved them slightly bringing them into contact with the underside of her pelvis and directly into her g-spot. She jerked as though she had been touched by a live wire and a more powerful moan escaped her lips. With unrelenting persistence I flexed and slid my finger back and forth over the sensitive patch of her cunt, eliciting a passionate moan each time my fingers came in contact with it, despite her best efforts at silence. In moments she lost the battle with her desire and her body shook and convulsed in the explosive throes of her orgasm. One hand reached up reflexively to grasp at her breast as her hips bucked in subliminal motion. I continued on without pause, striking again and again at the weak spot. She cried out, begging me to continue before lapsing into the incoherent mumblings of pleasure. Her pussy was the most responsive I had ever played with, reacting to my every touch like a finely tuned musical instrument.
In no time at all she was covered in a fine sheen of sweat, the muscles of her abdomen standing up against the tan skin of her stomach as they flexed again and again in the unending waves of pleasure my fingers wrought upon her body. When at last I allowed her to rest, brought to an end by my wrist cramping, her breath came out in ragged gasps, the uncounted number of orgasmims leaving her limp and drained.
However it took but moments for raw desire to rekindle in her. With wordless haste brought on by sheer lust she stripped me of my clothes with expert precision. Although my first thought was to be embarrassed by my body she paid my discomfort no heed. My cock already standing at attention in response to my earlier work on her body, she wasted no time in inserting the rigid member into her waiting mouth. She kept her mouth to one end, running her lips and her tongue over the sensitive head of my penis, while her hands worked on the rest of my shaft. With the precision that can only be won by extensive practice her head worked in time with her hands, bobbing and dipping upon the head off my cock while her hands stroked the rest of my length. If not for the whiskey in my system I likely would have been lost in that moment, pumping her willing mouth full of my cum and ending our fun prematurely. However for the first time in my life alcohol's effect on my libedo served me well and I was able to resist her expert skill.
Lifting her bodily from the ground I threw her down upon the nearest soft surface, being the edge of the couch which was partially pulled out into a sleeper mode. Spreading the cheeks of her ass I slipped my cock inbetween them, finding the glorious warmth of her waiting cunt. We both moaned loudly as my cock forced its way into her tight hole, spreading and shaping her around the intruding member. I used her ass as leverage, pulling her against me as I thrust into her. Her hands clutched at the sheets, leaving long lines in the cloth as testament to our illicit embrace. She moaned and cried, each thrust of my cock forcing a cry from her throat, wrenched from her mouth almost as though it were against her will. She begged me to fuck her harder and I did my best to meet her request. My eyes were trapped again by the soft white lines of her swimsuit tan, the long lines on her back and the triangle of white flesh etched into her body adding a sort of illicit pleasure to the act. The sharp delineation on her skin that marked the edges of what outsiders were allowed to see of her body heightened the eroticism of her nudity.
She cried out in pleasure, collapsing onto the bed as her body was rocked by another explosive orgasm. Although she was lost in the mind numbing pleasure I continued my assault on her pussy.
After a moment of rest I pulled her into a standing position before laying down upon the couch. The sheets were damp with the residue of her sweat and her pleasure, but it's moist touch was lost upon me. She took the cue from my posture and positioned herself over the head of my cock before sitting down roughly, spearing herself with my rigid cock. With as much help as I could provide her with she lifted herself up before again slamming herself back down, each time taking the full length of my cock inside of her. She worked herself into a pattern, rising and falling with increasing speed as she got into the swing of the new position. Her breasts bounced and swayed alluringly from the force of her motion as she thrust herself down upon my waiting cock and after only a moments hesitation, as I worried I would disrupt her concentration, my hand rose to her her chest, groping and pawing at the sensitive flesh. My efforts were rewarded as she moaned again at my rough touch.
I could feel the end coming, my orgasm approaching despite the help the whiskey had provided so far. I pulled her down from atop me and we sank to the floor. Our lips again found each other, with none of the delicacy that had marked our earlier kiss. Her mouth was cold, the telltale effect of her repeated orgasms and despite having cum so often since we had started her lips still fought against mine with a hungry passion brought on by unsated lust. I pushed her back against the floor and spread her legs. As I slipped my cock inside of her the sight of her exposed body before me, aligned in front of me in a way that she had not been since we started, was almost enough to make me cum right then and there. I fought a losing battle, thrusting inside of her over and over as I struggled to hold back the flood of cum that was fighting to be released.
"I am going to cum!" I moaned out throatily
"Oh god!" she answered "Cum in me! Please! I want to feel your cum inside my pussy!"
Although I wasn't sure that this was the wisest move I had ever made, I could not ignore her pleading. I let loose at last, a flood of cum exploding from my cock and coating the inside of her cunt with my seed. I desperately hoped that she was on the pill, because I wasn't sure how we would tell our parents if I knocked her up. As the wave of cum surged into her she was swept into her last orgasm, her eyes rolling up into her head and exposing the whites of her eyes as she shook and convulsed in pleasures grasp.
I collapsed on top of her, my orgasm robbing me of all the strength I had left. Indifferent to the slowly expanding puddle of cum beneath us we rested in each other's arms on the scratchy carpet of a rented cabin at the beach. She rested her head on my chest and pushed her body against mine. At last I knew a kind of peace that had been a stranger to me since that time, years ago, when I had walked in on her in the bathtub. I knew then that if she was pregnant that we would be together forever, and I was content with that possibility.
Source: reddit.com/r/sexystories/comments/3z6u84/my_step_sister_mforalpreg