My mother died a long time ago and my father decided to remarry someone else, so I had another sister. This stepsister is extremely lazy, refuses to go to work, and lies down all day reading stories. But even so, she was extremely beautiful, especially her huge breasts and soft round buttocks. And yet, she never wears underwear! The pants were small and thin, no different from panties, the shirt couldn't cover her nipples! Unable to take it anymore, I rushed to fuck her and ejaculated all my sperm inside her! But you don't seem to be angry with me at all, right? Knowing that, I kept fucking her every time I got the chance! And once when I went to the bathroom, I accidentally caught her, because my mother was nearby, I only dared to rub my cock on her ass and ejaculate. As soon as I returned to my room for a while, she also came to look for me. Then you also want to be fucked by me, just now I was the only one to orgasm, so you came to let me help you orgasm with me! We are gradually sinking deep into this wrong relationship...