At 21, My sister is 3 years elder than I am and is a very beautiful woman. She's fair-skinned, thin and has a switch in her hips that I admire. When I first became attracted to her, I first started noticing her body and watching her from a distance. When she would wear skirts, I loved to catch a glimpse of her legs and slim thighs. I even found myself noticing her breasts growing and always wanting to watch her when she was not looking.
Often, I fantasized about my sister and masturbated to the scenes that played out. I used to go in her bathroom where I could see her clothes and smell her, and I would simply close my eyes and think about her. Sometimes, that was all the fantasy I needed. I was very obsessed with her legs, constantly watching and hoping to get a glimpse of her legs. She wore skirts almost everyday, and that only heightened my attraction to her silken skin.
We shared a room as we had a small house. We slept together in a very large bed and had quite a bit of space for ourselves, but it was still one bed and oftentimes we were too close for comfort. Some nights I found myself unable to sleep because I was so aroused thinking about the woman sleeping next to me. It was one of those sleepless nights that I took the initiative of touching myself.
I lay on my back, turned my head towards my sister and scanned her body with hungry eyes. I slowly touched myself and found myself really hard and dripping with pre-cum very quickly. It didn't take long after that to cum and it didn't require much movement. After that first night, I didn't hesitate. As soon as my sister fell asleep I, would lie there next to her, touch myself until I was rock hard and then masturbate until I came.
She slept in a loose large shirt and a knee length skirt. Most of the time she slept with one of her knees slightly bent and the skirt would expose her legs up to the beginning of her thighs, slightly above the knees. Sometimes I tried to lift the very soft, silky material of the skirt to see more of her thighs, but I was usually too afraid to wake her so I would just watch what I could.
One night, I did manage to lift up the skirt slightly and was able to very gently expose most of her thighs. It was obviously very dark in the room so I couldn't see much even after lifting the skirt upwards but I had created enough space between her legs to be able to see inside her pussy if there had been enough light. It was just so dark that I couldn't see much and I didn't want to move very much as I didn't want to wake her. Still, I was so hot and hard that when I took my fingers to my cock, I was dripping with pre-cum. The whole situation excited me so deeply... the fact that she was my sister, the view of her thighs, the darkness, the danger of being caught... it was pure bliss.
I slowly masturbated just inches from her thighs, and very, very gently with the tip of my fingers, touched her thigh. I touched it ever so gently so as not to wake her up. It wasn't very long after that that I started pouring hot cum out of my cock, filling up my palms. After I had completed my orgasm, I just sat there for a few moments trying to control my breath. I did one last thing before I wiped my hands within my pajamas (like I usually did). I took just a very little bit of my semen and gently touched my sister's thighs with the wet finger covered with my cum.
I don't know why, I can't explain it, but it excited me so much. It was a sexual high that I can't really describe. Just seeing that little drop of my cum on my sister's thigh was beyond erotic.
2
In the following days I repeated this kind of behavior quite often. I would watch her body and masturbate at night... sometimes lift her skirt up... sometimes touch her with my fingertip... always very cautious. But it was one day by accident that I discovered something that brought a whole new world of incestuous sexuality to me. It was between 7 & 8 in the evening when my parents were out at a function. My sister & I were alone in the house and my sister was taking her usual shower before we had dinner. I was playing around in the room with the lights off and the lights from the bathroom escaped from the corners of the bathroom door and I could hear the water running. When I got up, it was as if desire pulled me and I walked towards the bathroom door. At that point, all I knew was that my sister was naked inside the bathroom and the lust it sparked inside me was the only thing I could see.
I stood silently in front of the bathroom door, tracing the lights that escaped the edges of the door, and brought my eyes closer to the edges, trying to peek inside. At the height I was, I could see nothing but the wooden edge line. I slowly moved downwards, bending myself as I traced the edge, and I hit one spot where the doorknob was and saw a small gap between the door and the framework. For a moment I was struck; my heart raced violently. I saw my sister standing in the shower, completely naked, with the gushing flow of water from the showerhead falling on her beautiful, gorgeous body. My penis twitched and jumped to a full erection in a second. I stood as if stoned, my eyes glued to my nude sister in the shower.
