The slut sister

My name is Keith and this is the story of how my little sister Karen turned from an innocent girl to a cock loving whore.

Chapter 1

It all began when we were in our early teens when I was 16 and she was 14. Our family is pretty well off and we live in a nice 3 story house with swimming pool, BBQ pits and a small tennis court. My parents made it big during the internet boom and having now retired, they enjoy going on travels on their yacht and are fine with leaving me and my sister at home. Up to the age of 12, both of us were home-schooled and our parents hired tutors to ensure that we caught up with other kids in school. As we were home most of the time, Karen and I were very close and we confided almost everything with each other. She told me that mom had put her on pills after her 13 birthday.

Last year, they decided that we should be in school and enrolled us in the local high school which caters to both our grades. At first it was a culture shock as we struggled to fit into the school system. However as weeks passed, we managed to make some friends and I made 2 close friends who share the same interest as me. Karen, on the other hand, got into the school volleyball team and was enjoying her school more and more.

Easter break came and our parents decided to leave me and Karen at home for 3 weeks as they go for another of their long vacation on their yacht, leaving us with enough money to look after ourselves. It was the first day after they left when I invited my 2 best friends over. We were playing videogames when Karen walked in from her volleyball practice.

“Hi boys, would you like to swim in a while after I go get changed and washed up after my practice?” Karen asked. My friends agreed as she went up the stairs. I noticed that my 2 friends, Tim, 16, and Zach, 17, continued to stare at Karen and were following her up the stairs with their eyes. Karen has grown up to be a beauty just like mom and now at 14; she is a stunning blonde with shoulder-length hair with a pair of lovely blue eyes. She is slim, 5’6 with perfectly shaped b-cup tits and a hot body to die for. Karen works out a lot as she is in the volleyball team and always wanted to try out for cheer team.

We then stopped the game and when to change as Tim and Zach discussed how hot my sister was getting. The few months after we got to know each other, Zach introduced us to porn and shared his stash of porn videos with us. We got all hard and horny and jacked off while watching the shows. Zach was the only one not a virgin and had a pretty girlfriend whom he would fuck when not with us. We got changed and got into the pool and was splashing around waiting for Karen to arrive. She arrived 10 minutes later and was wrapped in a towel and a loose top and had her hair tied in a ponytail. We stopped playing and watched as Karen took off her shirt and towel revealing her bikini body and got into the pool.

Karen it seems was going through sex education class in school and was very curious about her body. She confided in me a few weeks ago and we chatted about it in some aspect and I was getting hard when talking to her about sex. I told her that Zach was more experience in it and she should ask him.
As we were all in the pool, Karen suggested that we play knights, where one person would get on the shoulder of the other and try to knock he person off. We agreed and Karen chose to ride Tim while I had Zach on my shoulders. The fight started and I watched as Zach did not held back trying to push Karen off Tim’s back as he cooped a feel of her breast and body. It wasn’t long before Karen was pushed into the water by Zach and we all laughed. We swam for a while longer before Karen spoke: “Hey Keith can I ask you something?” I nodded and she continued: “Keith just now when I was riding on Tim’s shoulders, I felt a tingle down there and it was kind of nice feeling. I also enjoyed it when Zach touched me all over and …..”
The boys looked up and were staring at her grinning. Zach then said: “Well Karen that means you’re getting horny and excited. Do you want to learn about sex since you’re getting of age?” Karen shrugged her shoulders and asked: “Would you teach me sex?” Zach smiled and replied: “Of course, but you must promise me that you will obey me and not complain and I will teach you everything about sex.