A few years ago I went on vacation with my family to the outer banks. I don't know why but I was extra horny the whole trip. I kept masturbating where I wasn't supposed to. One night we built a fire on the beach. It was really nice. as my sister stood up I noticed her perfect cameltoe. It was so sexy. I went down by the edge of the water and jerked into the ocean. It was dark so no one could see me but I could see them. I was so turned on by her body after that. I jerked off into her bath soap twice so that she could rub my cum all over her body.
Later that week she was washing her clothes. I grabbed her bikini bottoms out of the dryer and took them to the bathroom. I jerked off right into the crotch and balled them up to put back in the dryer. She wore them that same day. I can honestly say that my cum has been on my sisters pussy lips.