I am the youngest of five kids and am the only boy, growing up with four older sisters had its ups and downs but for the most part was not all that bad. When my sisters were all teenagers my dad came to the conclusion that one bathroom and one large bedroom was not enough for the four sisters. He managed somehow to add a bedroom in the attic with a bathroom that became mine and then added on to the main level with more bedroom space and another bathroom for them. It was a much better arrangement and the girls had more room with two to a room and two bathrooms. My youngest two sisters though still ended up being the last to shower in the mornings and soon were using my bathroom to shower, this was usually not a problem as they had to be to school before me anyway. I would lie in my bed and wait until they were done then use the bathroom. My youngest sister usually had to wait to use the shower and would sometimes sit on the end of my bed. One morning I awoke without any covers on me and I was hard as a rock with it pushing my pajamas straight up, I have no idea how long my sister had been sitting there but she was smiling at me when I was waking up and when I rolled over to hide it she asked me if it was like that every morning. I told her it usually was and that most of the time I had go to the bathroom. This happened a few times and one morning I awoke to find her touching me through my pajamas, she had her hands around it and was gripping it pretty hard, when I woke up I told her to stop before someone saw her. She told me not to worry and asked if she could see it, not really having a good reason not to let her, I pulled the waist band down over it and let her look. She reached right out and started running her fingers over me and smiling telling me it was much bigger than she had pictured it would be. The shower turned off and I grabbed my bottoms pulling them back up and she went over to the bathroom to get her turn with the shower. My other sister opened the door and left the bathroom for her to use but when she went in she did not close the door and from where my bed was I could see the majority of the room including the shower. She dropped her nightshirt to the floor and opened the shower door to turn on the water with me staring at her naked body the whole time. The glass door left very little to the imagination and I watched her shower the whole time, I masturbated while watching her. This went on for a few months with her wanting to touch my penis in the mornings and then showing me her body either right there on my bed or leaving the door open and letting me watch her shower.
One day my parents announced that they were going to be gone for an overnight at some holiday party that my dads work was having a few hours away and that my two older sisters, one was college age and the other a senior in high school, would be in charge. Sometime in the evening my youngest sister came up to my room and asked what was going on as I was laying there listening to music and reading some magazine I told her nothing much and she sat down on the floor while we talked for a while about all sorts of different things. Soon it was late and she went back downstairs to go to bed but within fifteen minutes was back in my room with only a nightshirt on and sat on the end of my bed. Her nipples were clearly visible through the material and it was hard to not look at them because they were quite hard. She told me that everyone else was sleeping and she was not really ready to go to sleep yet so she wanted to come back up. After about ten minutes she looked down at her breasts then commented that I had been looking at them a lot and could touch them if I wanted. I fondled them through her nightshirt and within a few minutes she pulled the shirt up above her waist and put my hand under it so I could feel her skin directly. They were so firm and her nipples were like rocks, she had one leg off the bed and the other was bent with her sitting on her foot, her nightshirt was pulled up and now I could clearly see her pussy. After about five or so minutes of playing with her breasts I got brave and slid my other hand between her legs and started feeling her lips and wow was she wet and slippery. She shook a little when my fingers ran up and down her and told me to rub near the top guiding me to her clit, which once she showed me it was not hard to feel, it to was hard and she loved it when I ran a finger in circles around it. Soon she was on her back with both legs spread around me and I was doing my best to match her hip thrusting with my fingers massaging her clit, she told me use my other hand and slowly insert a few fingers. I was so hard I was ready to burst out of my pants as she started breathing really hard and grabbed the blankets pulling them over her face to muffle her moans. Soon she grabbed my wrist and pulled my hand away from her breathing very hard and telling me she had a great orgasm. I did not even know what she meant really as I had never really scene a woman have one before. She sat up and I still looked down at her breasts which had hard nipples poking the material out and she was smiling at me, then she told me take my pants off and lay back on the bed. I was in complete astonishment when she gripped my penis in both her hands and watched her mouth engulf my penis, she began stroking it with her hands and sucking it with her mouth and I think I lasted about ten seconds before I was having an orgasm. She never even missed a beat and swallowed everything sucking on me well beyond my orgasm, when she stopped she told me she had always wanted to do that instead of just reading about it.
A few months later I was sleeping away when my bed started moving and I soon realized it was my sister climbing into it. She pulled the covers back and crawled under, once she was inside she was basically laying half on me and half off. She told me she was cold from the walk up here as my parents kept the heat at about 63 during the night. I asked why she was coming to bed with me and she told me she just was really feeling turned on and wanted to come up and give me oral again. I told her she was crazy and we needed to wait a while to make sure no one else was up, she told me to listen for anyone and she slid under the covers and pulled my bottoms down a little and soon had my cock hard in her mouth. When she was finished she slid back up and asked me if I heard anyone, giggling a little like she was hoping to get caught. I sighed and told her no, she said good and pulled the covers up over her shoulders then slid up my chest until she was positioned right over my face. I could smell her wetness and started licking her right way until she came with her fingers gripping my hair and her legs squeezing my head quite hard. She leaned down and told me that was absolutely great and would I do it again with her laying on her back. I obliged her because she tasted so sweet and I was hooked, soon she was grinding her hips and pulling my hair with my mouth wrapped around her pussy sucking on her clit. Lucky for me my bedroom was over the living room as I am sure the bed made a little noise on that one and she had a few moans that made me worry.
Well anyways I could go on and on with the story but we had a lot of fun for about two years and never got caught by anyone.