The piano's haunting melody fills the room as the siblings rehearse, their shared intensity palpable. The brother's hands tremble, not just from the music, but from the desire to touch his sister. She notices, leans in, and whispers, 'Play me, not the piano.' Their eyes locked, he begins a new piece, his hands roaming her body, their breathing syncopated, the music building to a climax that mirrors their own, forbidden desires.