When we were in our late teen years, my sister and I were at a swimming pool. She had her bikini underneath her daisy duke shorts. She was pulling her shorts down, but accidentally pulled her bikini bottoms down right in front of me. For a full 2 or 3 or seconds her pussy, with a nice thick mat of black pubic hair was just feet from my face. I got quite an eyeful. Once my sis noticed, she quickly pulled her bikini bottoms up. I quickly turned my head and pretended not to notice anything. I didn't want to embarrass her. Later that night, and dozens of times since, I have masturbated to the image of her pussy. Anyone else ever experience anything similar (masturbating to a family member)? Wondering if there is enough here to build upon for a nice story?