When I was 14 my sister caught me sitting on the toilette with my pants and underwear down playing with myself. I was sure I had looked the door, but didn't know it could be easily open by pushing pin through a small hole. I just heard a click, walked in on me saying "you horny little boy" while she watched me struggling to pull up my pants and stuff my hard dick back inside. "Don't be in such a rush" she told me, I have already seen it. Getting caught masturbating had to be there worst humiliation ever and all I could do was stand there wishing the earth would swallow me. She stood there grinning at me pleading with her to not tell my parents and all I could get out of her was "I'm not making any promises" That night I was scared shitless sitting at the dinner table, with my sister along side me and our parents across from us. Sat there all tense trying to figure out if she had spilled the beans on me, when I felt her hand under the table squeezing my dick. Couldn't do anything else but pretend nothing was happening while she kept squeezing and feeling my dick growing under her hand. I remember the first girl that jerked me off was my sister. She kept threatening to tell my parents and girls in school. I remember it felt much better than having to do it alone. In fact she was the first girl that gave me a blow job and the first pussy I tasted was hers. I don't know why we never got caught. We both knew we were doing something wrong, but we kept doing because it felt so good.