Web Young - Spying On Sis

Gianna Dior and Savannah Sixx, two teenage closest friends, are laughing and having fun in Gianna's bedroom. Scarlett Mae, Gianna's sister, interrupts their cheerful mood by barging into the room and admonishing the girls not to enter her room since she is having her boyfriend over. She finds the girls' taunting to be annoying. The youngsters laugh and roll their eyes at Scarlett's attitude as she issues one last warning before shutting the door on them.
Later that day, the girls start to wonder what Scarlett is up to as they start to faintly hear rhythmic squeaking and groaning coming from down the corridor. Savannah speculates that they are having sex.