Hidden behind the heavy curtains, the siblings' bodies press together, their breaths ragged with anticipation. Her small hand wraps around his throbbing member, guiding it to her tight, wet entrance. He pushes in slowly, filling her completely. They move together, their bodies slapping against each other, the sound of their lovemaking filling the room. Outside the window, the world continues on, unaware of the forbidden dance they're engaged in, their bodies entwined in a dance as old as time itself.