I Had No Idea

Picture this. You're at home, going through your mail, when your step-sister gets home from her day on campus. She's in a pleated skirt, knee-high socks, and a white button-up blouse. You've known each other for a short while, but you can't really get her out of your mind - even when she's pestering you for a night with the car. As she heads up to her room to study, you catch a glimpse up her burgundy skirt - there's a flash of purple panties before she slides out of view. You make your way upstairs and peek through the doorway… There she is.