Was Jilled By My Best Friend's Sister

Up until about three years ago, I had a pal named Stefanie. About 4 months after these experiences occurred, she and her family moved to another province. Stef and I had spent a lot of time together both at school and afterwards. We even spent nights over at each others places on the weekends. During those sleepovers, we always stayed up late talking and stuff. Usually it was about the normal stuff: school, friends, movies, boys. This one time though, she surprised me and asked me outright about masturbation. Should say that she was a couple years younger then me. She then went on to say that she had never done it but had caught her sister (older then us)doing it once. For the next few hours, we laid there and talked about it. Just talking about it made my pussy wet and it sent a tingle through me. We finally went to sleep and I never did get a jilling in. I was riding home from another friend's place after school one day and was passing by Stef's house. I put my bike on the lawn and went up to the door. Her mom answered and said that Stef wasn't home yet, but if I wanted too I could wait in her room for her. So, I went on upstairs. I sat on her bed for awhile and saw a piece of paper on her bed table. I picked it up and boy oh boy, was it a raunchy story. It talked about how this girl had a sexual experience with her sister and it was very detailed. I laid back and began to read it. All the while, my pussy was on fire and it made me very horny. I slowly started to play with my titties over my shirt and worked down towards my crotch. I slipped my hand into my jeans and was surprised at how wet my cunt was. By now, I was so hot that I removed my shirt and bra and had undone my jeans. Just as I had pushed them down and had my hand on my pussy, Stef's sister walked in. I turned red and grabbed my shirt and threw it across me. She didn't leave, but just walked over and sat on the edge of the bed. She grabbed my shirt and tossed it on the floor and started to rub my legs and inner thighs. As she was doing that, she said, "you are one fine girl and you got the sweetest legs" and worked her hands up until they were at my pussy and bush. She started to rub and finger me and said, "just lay back and enjoy it!" I did. Soon, but what seemed like an hour later, she reached into her bag and pulled out the longest vibrator I had ever seen. I mean I had never seen any before that, well except for the one my mom had, this one was like 9 inches long. She slowly ran it around my pussy a few times and then stuck it into me. It only took a few minutes of her thrusting it in and out and I had a powerful orgasm. She then laid on the bed and told me to do what she had done to me to her. I did and she came. She then leaned in and started to suck on one of my small titties. That sent another wave of pleasure through me. Just then, Stef walked in and saw us. She looked mad at first, but then quickly shut and locked the door and joined us. The 3 of us played around and got each other off a few times each for what felt like hours. It was maybe an hour! After that time, just about anytime Stef and I were together, we would have a mutual session of dirty talk and masturbation fun. That all ended about 2 months later when her family moved away. Even though I lost contact with her, I have had many wonderful orgasms and thoughts of all our fun while masturbating. Oh, the joys of remembering the good old times!