It seemed I was always masturbating, after my friend Amy showed me how at a sleep over. I did it every chance I got. Usually at night when others were asleep. One night I was busy rubbing my clit when I heard my older sister come home from a date. She’s 17 I’m 14. When I heard his voice too I quietly went to the stairs and looked down on them. They were standing by the front door. Well actually he was standing and my sister was on her knees in front of him, rubbing his crotch. I could hear him begging her to blow him. I had heard of blowjobs at school from other girls but really didn’t believe girls really put a guy’s thing in their mouths. I mean guys pee with it…. Nasty I always thought. She was saying mom and dad might hear I can’t but he kept begging her to blow him. OK OK I heard her say but be quiet please be quiet. He undid his belt and she unzipped him and pulled down his pants. They went to his ankles and I almost gasped out loud when I saw the huge bulge in his underwear. I never dreamed guys pee pee’s were that big! She squeezed on it threw his underwear as he leaned back on the door moaning suck it baby suck me. Quite I hear her say as she pulled his underwear down, and I got to see why they call it a hardon, my god it was big and fat. She held his cock as she licked his ball sac, he really seemed to like that, then she opened her mouth and put his pee pee in her mouth she had about half of it in her mouth. He held her head and seemed to move it on and off of his thing. I could hear her sucking and slurping on it like a big sucker. All the while he was moaning eat me, eat me baby suck my balls dry. Of course seeing and hearing this had me so horny, I couldn’t stop playing with my pussy, I must have come 3 or 4 times before I heard him say I’m cumming baby, suck me dry. I could actually see her throat move as she swallowed his stuff. After a minute he pulled out of her mouth turned her around flipped up her skirt. She wasn’t wearing any panties. She held on to a chair by the door as he rubbed his thing up and down her crack from behind. My clit was sore from all the rubbing so I started fingering my hole as I saw his thing enter sis from behind. They were fucking right there with mom and dad upstairs. I couldn’t believe it. I heard sis tell him to hurry she needed to cum and to do her harder. His thing was pumping in and out so fast now, almost a blur. I heard her say she was cumming he pulled her panties out of his pocket and put them in her mouth. As a gag I guess so she’d be quite. Then he pulled out of her pussy and I saw his cock shoot cum onto her back. They kissed and he pulled up his pants. As she picked up her purse she was looking away from him. He looked right at me and winked. He had seen me he knew I was watching them and he had done it anyway.
Later one day when he came over I got to taste it myself but that’s another story for another day.