Caught

When I was 12, I was caught masturbating by my sister, who was 10 at the time. I thought I had locked the bathroom door, but realized that I didn't when she came barging in. I tried to hide my swollen penis but it was too late. She threatened to tell my parents unless she could touch my still erect penis. Not having any real choice, I agreed. I have to admit that it felt great when she placed her warm fingers around my penis and moved them slowly up and down. Almost instantly I had an orgasm and sent a small amount of cum onto her hand. She asked me if I could do it again, and I explained that I would have to rest for a few minutes. Just then I heard my mother call us for supper. Sis didn't ask again that night. I was disappointed.