Two fingers shoved up her asshole changed the mewling into a loud moan. A few minutes of that, and I was ready to have the pleasure returned. I sat up... and rolled her over on her belly, and told her to stick her ass up in the air. Using one hand to finger her clot, I began to smack her ass. Practice had made me good at it, and each smack gave a loud pop and left a darkening red stain on her ass. When her ass was glowing red and her cunt oozing juice, I moved so that my cock was in her face. She. Actually it is about the first time I had sex and that "first time" was with my sister. This story might not be as exciting as all those erotic incest stories you've read on the net, but it is real, every word is true, even the names that I use.What happened to me was totally unexpected. My sister Sandy was 16 at the time, two years older than me and a lifetime ahead of me in sophistication. We were on our annual family summer vacation, camping in the Rockies when a summer storm came up causing. When he was sure they all were looking he slip his hand up between both legs under the skirt and let his finger caress her pussy through the panties. She liked the feel of his hands on her legs and as she watched him she began to get the idea of what was going on tonight and it turned her on. The two of them were going to get the other couples involved in group sex; she was part of the seduction of the other women. She got all hot and wet and now wanted to play the game for real as she felt. Her arms wrapped around my shoulders as she planted gentle kisses on my neck between her grunts. Her cock bounced between her tits and my torso.Using both my hips and my arms, I began rabbit thrusting up into her tight quim. Soon, I had most of my dick up inside her and then I decided not to hold back. Slamming her box roughly, I let go of my usual "not want to hurt her" mentality, and truly fucked her hard. Soon I even forgot the water running down my back from the shower.I bet my knuckles.