I wrapped my hand around his tool.“ Oh my, I think I found something else”“ What did you find , Mess Charity?”“ I found George’s big...fat cock!”, I smiled.Chet spit out beer in a choke and George nearly did the same. He tried grabbing my hand away but I gave his fat dick my best kung fu grip. I started stroking his big beast under the water, despite it not being the best angle. Chet looked like he was going to faint.“ Good for you Mess Charity, it is such a big thing , si?”“ Si, Consuela,. Carefully, I put my hand on the door handle, and twisted, pulling it outwards. I stepped inside, and immediately noticed Miss Smith in a swivel chair, with her back to me, listening to an mp3 player. I stepped closer, trying to make as much noise as possible, so as I wouldn’t startle her, but she didn’t hear me. As I neared her, I heard a faint moan, as she arched her back. One of her hands went to her breast, under her shirt, and from my angle, I could guess the other was up her skirt that. You were wearing a lovely shirt and jeans, the casual look for a male on a night out. I smile at you, hoping to catch your eye, you come over and we start to chat, nothing too flirtatious at the beginning. Just two people having a drink and getting to know each other. I like the look of you, handsome but not in an in your face handsome, just something about you, maybe it your structured cheek bones or just your confidence about the way you look and how you act. My friends come over telling me. Thinking of how I’d like to fuck that ass and dominate her. After cumming, I had a realization as to what happened.I got worried that I had ruined the relation. She is my sister and how could I do that and all of it. Then came dinner time. We still had not spoken to each other other than generic conversation whenever our parents were around. Around 12, everyone went to their rooms.There were 4 bedrooms, one each for her parents and mine, one for her, one for me. We all said goodnight to each.