In her room, Ximenita692's sister innocently chats with her boyfriend on the phone, but her true nature is revealed as she masturbates, her moans filling the room. Unbeknownst to her, Ximenita692 listens in, her curiosity piqued. As her sister's phone call becomes more heated, Ximenita692 can't help but join in, fingering her own pussy, her breaths syncing with her sister's. The sudden creak of a floorboard startles them both, and Ximenita692's sister hangs up, flustered. Ximenita692, however, is far from satisfied, her mind filled with the image of her sister's desperate need.