My stepsister understands my fondness for watching her orgasm on her body - Complete narrative

I've been caught countless times pleasuring myself while watching my stepsister's intimate moments. She's always been a stunning 18-year-old with natural, perky tits and a body that screams sin. Despite my attempts to hide, she's always been privy to my secret pleasure. Initially, it was unsettling, but now, I find myself craving her company. One day, she finally confronted me, revealing her understanding of my fascination. She's always been an amateur in the world of porn, but she's perfect for this role. On a quiet afternoon, she invited me to watch her pleasure herself, promising a private show. As I entered, she was already naked, waiting for me. Watching her touch herself, seeing her beautiful face contort in pleasure, and the cum cascading down her body was an experience I'll never forget. The sight of her small, firm tits covered in cum and the sight of her young, 19-year-old pussy dripping with her own juices left me breathless. It was the best creampie I've ever seen.