The siblings' breaths hitch as they stand mere inches apart, the cool marble of the museum floor stark contrast to the burning heat between them. She tentatively reaches out, tracing the lines of his tattoo, her fingers brushing against his chest. He captures her hand, pressing a kiss to her palm, then leans in, capturing her mouth in a searing kiss. She melts into him, her body molding to his as they explore each other in the shadows of history, their whispers and moans echoing through the silent halls.