I was around 15 and my younger sister was about 12. I walked by her room one day and see her rubbing herself and it made my dick so hard.

I thought about it in a night when I had a wank, and it was all I could think about. I waited until we had a movie night and she would regularly cuddle up on the sofa under a blanket. I started my hand off on her shoulder and slowly worked it down to see if she would stop me or move at any point. I ended up working her nightie up and she had no knickers on. My heart was racing, I felt her little bald pussy, and started rubbing her clit, she even moved and opened her legs slightly so I could get better access. I could hear her soft moan and her pussy was starting to get wet. I started rubbing her faster and she held onto me tight, I could tell she was going to cum so I kept going. What a feeling making my younger sister cum, my heart was going crazy when I felt the cum dripping out of her pussy. She then went to clean up and went to bed. Needless to say I had the most intense wank of my life that night. There is more so let me know if you's want to hear