What Was I Thinking

When I was 16 it was just my mom my 8 yr old sister and 2yr old brother. Mum worked so I looked after my little sister after school but one afternoon I made a big mistake and did something I'm not proud of at all. We got home and as always my sister got changed and went to her friend's house a few doors up the street. I thought a little time to myself and while sitting on my bed I started mastubating. I was having a wonderful time of it all and I think I cum 2 or 3 times and one of those let's just say....leaving my being in a bit of a state. I had a feathery curtain type thing across my door and little did I know that my sister's friend wasn't home and my sister watched pretty much the whole event. Well she was horrified but she did want to know what I was doing and why. So I had to tell her something or she might ask my mum and potentially get me in trouble. So I just told her that sometimes when we touch ourselves in certain ways it feels nice. Then I made the foolish mistake of showing her because she didn't get any result and even used my little vibrator on her clitoris with my toung and I lucked her to her first orgasm. From that day onwards she does it all the time. I feel horrible that I took away her innocence and she didn't get to explore her sexuality on her own I eventually told my mom and my counselor and things are ok now but I'm still going to have to live with it. My sister says now that I'm not to worry about it and that she is glad that I showed her I feel like