My first time posting but I am the youngest of three and have always been super horny but I have a sister 24 a brother 22 and me 19. Anyway after a jerk session in bed one night I was enjoying the after glow in the quite of the house a I hear the familiar sound of a bottle making the fart sound when it’s almost empty so being curious I got out of bed and and put my ear to the bedroom walls and I could hear the heavy breathing of my older sister and instantly I got hard because I knew what she was doing and after a minute of listening I could not help but get my cock out and stroke with her. A couple of minutes later the sound changed and there was a long slick sound which I know from my cock stroke and I almost shot my load as I realised she has a dildo and is plunging it into her pussy right next to me, just the thought of that for a minute and I blew a load all over the bedroom wall. I stayed pressed against the wall until I heard the faint sound of her coming and then went to sleep. The next morning as she walked out for breakfast I could not help but think about what she was doing and got a boner instantly, once I calmed down a bit I decided to be a bit naughty and in the pj bottoms that I had on you can see my cock outline so knowing I had half a cub still I announced I’m off to get ready I stood up as she lifted her head, stretched giving her time to see then left where I went straight to my room to jerk off agian. After all that I can’t stop thinking about her and have also wondered about my parents and brother

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