As the cruise ship sails into the sunset, so do these siblings into each other's arms. In the dimly lit lounge, they share a secret smile before disappearing into a secluded corner. His hands roam her curves, lifting her dress to reveal her soaked panties. She moans softly, unbuckling his belt, freeing his rigid cock. Kneeling, she takes him deep into her mouth, tasting the salt of the sea and his pre-cum. He lifts her up, bending her over the nearby table, and plunges into her from behind, their bodies slapping together in a dance as old as the ocean itself.