Hey little sister! It's your fault for having such a sexy ass! This is your punishment for flashing your panties in front of me! My dad remarried and suddenly I had a new little sister who's a gyaru. She doesn't seem to think of me as a man, so she flashes her panties all she wants around the house. I was Kokoro by her big ass that jutted out, and I couldn't stop getting a super erection, so I plunged in from behind! My cheeky little sister resisted strongly, but her asshole twitched and she started to feel it. Her black ass from behind was so sexy that I came in her vagina many times!