Under the watchful eye of his older sister, a timid brother answers her late-night Zalo call. Her voice, hoarse with desire, commands him to pleasure her from afar. He tentatively follows her instructions, his small hands exploring her wetness over the phone. She moans, urging him on, guiding him to tease her clit until she cums violently, her cries of pleasure echoing through the phone. Their secret game of submission and control continues, their bodies never touching, yet their connection undeniable.