I was in the pool today and a friend of my sister was there too. She was sitting on the edge of the pool with her knees scrunched up into her chest. The crotch of her bathing suit was loose and I had a perfect view of her slit.
She is twelve, but already had some dark straight pubic hair. I talked to her for fifteen minutes like that and it gave me a boner. I had to wait like half an hour before I could get out of the pool. I then went up to my room and masturbated. I came twice. I hope she keeps that suit for a while!