My step-sister, who I suddenly got after my parents remarried, looks beautiful and pure, but she's actually a slut! She's super defenseless at home, and even when I'm there she flashes her breasts and panties! So of course I stare at her! And I get an erection! I thought she'd find out and get angry if I got an erection every day, but she actually wants my dick, so I'm super lucky! I'm a virgin, and I was so excited that I was shaking my hips and didn't notice that my step-sister was cumming, so I made her cum over and over again with my continuous hard pistons and ejaculated over and over again!