Beneath the twinkling lights of the Christmas tree, a brother and sister, bound by blood and the season's spirit, succumb to their forbidden desires. She's a vision in red, her curves accentuated by the silky fabric of her new nightgown, a gift from him. He's a tower of strength, his muscles visible through the thin material of his new boxers, a present from her. As they stand before the fireplace, their breaths visible in the chilly air, they can no longer resist the pull between them. Their lips meet, their bodies press together, and they begin to unwrap each other like the gifts they are.