Hidden away in their shared room, the siblings give in to their secret desires. The brother, Pica, strokes his cock, his gaze fixed on his sister as she tentatively touches herself. She's inexperienced, her movements hesitant, but Pica's explicit guidance spurs her on. She moans softly, her fingers finding her clit, rubbing it in tight circles. Pica's hand moves faster, his breath coming in short gasps as he watches her. The room fills with their combined moans, the scent of sex heavy in the air as they push each other closer to the edge.