Me and My Cousin

I remember my female cousin (who's nine months older) and I were spending an afternoon alone together during summer vacation. She lived about a mile form us so we spent a lot of time together. We were about 14 or 15. For a while now I had noticed Joy (not her real name) grow to be a very cute girl and had a nice figure. Since we were together a lot we would hug and play around with each other. Looking back, I think we were both very interested in the opposite sex and used each other as 'flirt buddies.' Anyway, that afternoon I was upstairs relaxing in a chair and Joy was downstairs enjoying some music. I was feeling really horny and there was a vibrator on the floor next to me. (My first orgasm resulted from using that old vibrator...but that's another story.) I started using it on myself and it felt really good. So much in fact, I had forgotten Joy was downstairs. After a few moments, Joy came up the stairs all the while I had the vibrator focused over my shorts and I had my eyes closed. I was startled and very embarrassed when she saw me in this compromising position. So I turned off the vibrator and blurted, 'What's up?' I think her initial reaction was shock but she knew what I was doing and just stared at me for a minute. I was still very hard and knew I needed 'closure' so I boldly picked up the vibrator and continued on. Joy, still a bit shocked, said, 'What are you doing?' and I replied something like, 'It feels sooooo good...' Then I asked her stupidly if she would sit on my lap while I was masturbating with a vibrator... and to my surprise she didn't say another word and sat on my knee. I grabbed her so she was sitting on me in my chair as I continued using the vibrator. I knew she was also enjoying the vibrations since I was moving the vibrator head up and down. She eventually moved the vibrator to her clit and started to moan... again all the while she is sitting on me. It wasn't long until she came and let out a most satisfying moan... I then picked up the vibrator and came hard in my shorts... We both got up and used different bathrooms to clean up. She stayed downstairs for the rest of the afternoon until my Aunt picked her up. We really never talked about this again... but our flirtatiousness continued for a few more years.