"Juguemos un poco antes," the girl whispers, her voice laced with desire. She begins to touch herself, her brother's eyes glued to her fingers as they dance over her slick folds. He mirrors her actions, his hand working his shaft with increasing urgency. They're playing with fire, their bodies yearning for the final act, but they're enjoying the build-up, the anticipation, the dance of desire that's about to lead them to a explosive climax together.