This story took place when my sister Kelly and I were still living at home. I was 17 years old and my sister Kelly was just past her 15th birthday. Ever since I can remember Kelly has always been a pain, when she was younger, she used to follow me everywhere. At around 13 she finally got her own friends and left me alone. We were the normal brother and sister and normally fought like cats and dogs whenever mom and dad were around. Mom and dad were always yelling at me to stop teasing Kelly.
Near the end of the school year mom and dad told us that they were going to go and visit with grandma for the weekend. I started complaining bitterly saying that I did not want to go and spend my time with an old woman. They finally relented and told me that I could stay home as long as I promise not to have any of my friends in the house. Once Kelly her that I didn’t have to go she said it wasn’t fair and she want to stay to. My parents finally agreed with the understanding that she had to listen to what I told her. They said that they would phone at 9 o’clock each night and that we had better be in the house when they called.
On Saturday night I finished up my ballgame and went home at about 8:30, Kelly still was not there so I phoned her on her cell phone and told her that she had better get home when mom phoned, Kelly said it was starting to rain and she wanted to wait until it stopped. I told her that she had not screw up a good thing or mom and dad would never let us stay by ourselves again. It was raining heavily but I could see Kelly running down the sidewalk from one of her friend’s place. By the time she got inside the house she was soaking wet, her white T-shirt was almost see-through, and I could clearly see her erect nipples. I think that was the first time that I really noticed that she had good sized breasts. As she pushed by me in the hallway, she said pervert stop looking her tits. She then went into her bedroom grabbed some dry clothing went into the bathroom so she could change into her nightie. When mom phoned at 9 o’clock I told her everything was perfect and that they could stay away for a couple more days. She said that was unlikely to happen and they would be back Sunday evening.
We were watching big brother on TV at about 9 o’clock when the lights went out. We both looked out the kitchen window and watched the lightning strikes for about 10 minutes before I said that I didn’t think the power was going to come back on and that we might as well go to bed before it got dark. Kelly had always been afraid of thunder and lightning storms, whenever we had a bad storm mom and dad would let her sleep in their bed. I could tell that she was nervous and asked if she wanted to stay in my room until the storm ended. She quickly agreed. We made some minor rules about not touching each other.
I woke up at about seven in the morning, I looked over Kelly was laying there with her eyes closed. I was laying on my right side, she had her back pushed tightly against my chest and groin. The top of her nightie was open so I could easily see her breast. I laid still for about five minutes sneaking peeks at her breast, until I could feel my cock starting to swell in my pyjamas. I rolled onto my back as Kelly opened her eyes. She got up and quickly went to the bathroom. When she came back into the room, she picked up a pillow and hit me with it. We wrestled for a while before I eventually managed to pin her face down on the bed. I began to tickle her unto she begged me to stop. When we were wrestling my cock was tight against her ass and became quite hard, when I rolled off it looked like a little tent in my pyjamas. I released Kelly and rolled onto my back. She moved into a sitting position on the bed, and said oh my God do you have a hard on? She was quiet for a minute or two and then asked if she could see it. We looked at each other for a little while and neither of us said anything. I finally said I’ll show you mine if you show me yours. I sat up and slid my hands under her nightie and pulled it up over her head. Her tits were bigger than I had imagined. I reached over and gently touched each of her breasts and started playing with the nipples. She slid her hands into my pyjamas and pulled them down, as soon as she did my cock sprang to attention. She reached out and grabbed it with her hand gently squeezing the shaft.
I laid on my back to give her full access to my cock and nuts, she stroked my cock with one hand and gently reached out and touched my nuts with the other. She was a little rough on my nuts and I grunted, she quickly moved her hand away and asked if that hurt, I said they are very sensitive. But it was okay if she wanted to play with them. She took the shaft of my cock and held it against her cheek, saying that it was so nice and warm. I said that I wanted to see her pussy, she rolled onto her back and pulled down her panties. I was surprised to see that she already had thick pubic hair. I laid my hand across her pussy before sliding my finger gently inside. She quickly inhaled, grabbing my hands and saying that we could not get too carried away because she was a virgin and was not on birth control. I laughed and said that she could not get pregnant or lose her virginity from my fingers. I positioned myself between her legs and gently began kissing the edges of her pussy. I pulled open her pussy lips with my fingers and started probing inside her pussy with my tongue. I moved up to her tits and started sucking and kissing them, her nipples were as hard as little rocks, she moaned when I nibbled on them. I started kissing her neck and nibbling on her ears before sucking her tits. I moved my cock back and forth over lips of her pussy, occasionally getting its head inside of her wet pussy. I said that I really wanted to fuck her. She put her hand over her pussy and said that we needed to get condoms before I could stick it inside.
Kelly said some of her friends had talked about given boys blow jobs. She said that she had touched and played with boys’ cocks before but had never taken a penis into her mouth, she wanted to find out what sperm taste like. I laid on my back and said that she would have to take it all the way down her throat, she looked at my cock and said it was so big, but she would try. She opened her mouth and slowly slid it in before she started to gag. I said it was okay and that there was another way to get sperm. I told her to firmly grasp the shaft and pull up and down quickly. She started jerking me off, but her hand got tired. I took over and after couple of minutes I could feel my nuts tightening and said that I was about to cum. I kept stroking my cock and rolled on top of her, she watched as my cock shot three strong streams of sperm over her stomach and tits. I asked her if she wanted to taste it and she nodded. I moved up so that she could take my cock into her mouth. She stuck out her tongue and gently licked the head of my cock before opening her mouth and taking it inside. After a couple seconds I pulled back and laid on the bed. she said that was a taste that she could really get used to.
I laid my hand on top of her pussy and started to probe her with my fingers. I was able to get to fingers inside and started finger flocking her. She moved her hips in a rhythm to match me. After of couple minutes she arched her head back and said that she was going to have an orgasm. I quickly placed my mouth over her pussy and stuck my tongue deep inside. Kelly grab my head and forced it tightly against her pussy as she climaxed.
Kelly laid her head across my chest as I gently stroked her breasts squeezing and releasing the nipples. Kelly said that we both needed to go have a shower and get ready for breakfast. After we had gotten dressed and finished breakfast, we sat around the kitchen table. Kelly asked how long it would take before I was ready to cum again, I said about an hour. She smiled at me and said good let’s go to the drugstore and get some condoms. She wants to feel my hard cock inside her pussy.