This takes place back when I was 14 years old. I lived with my mom, and my sister. My sister is two years older than me, so at the time she was 16. Each one of us had our own room that we slept in. I was developing nicely I suppose, with B-C cup breast, a nice figure, and a nice bush down there. I had always noticed my sister and how nice she looked. She had nice developed breast, a nice figure and a beautiful face. I would spy on her when she was taking showers and changing, and I was never caught by her.
Anyway, one day all three of us were home on a Saturday night I think, and we were all in the Living room watching television. We were watching LOST actually, and it was one of the scenes where they were kissing and ready to have sex, but of course they did not show that. I was horny, and I think my sister was too so she headed up to her room. I decided that I would also go to my room and take care of business. I went down the hall, into my room, and I laid on my bed with my pajama bottoms to my knees and my top over my breasts. We do not have locks in our house, so I had to be careful because I did not want to get caught. I began to masturbate, and I was doing it for a while when I started to breathe harder and pant softly, when all of a sudden my mother came through the door. I quickly tried to cover up, and she said that she was sorry.
Later the next day, I was kind of embarrassed to talk to her, but we had to sit down for 'a talk.' She told me that it was okay to masturbate as long as I did it in my room and I did not watch porn. I was happy that she did not care, and sometimes I tried to get caught by my sister on purpose. It was always fun and I have always enjoyed masturbating.