As the rain lashes against the window, a brother and sister huddle together under a blanket, watching a late-night horror movie. The sister, shivering, leans into her brother's warmth. He wraps an arm around her, feeling her body heat through her thin nightgown. As the movie's tension reaches a climax, so does their own. The brother's hand, resting on her shoulder, begins to stroke her arm, his thumb brushing the strap of her gown. The sister's breath hitches, her heart pounding in her chest. She looks up at him, their faces inches apart, their lips parted. The room is filled with the sounds of their heavy breathing and the distant thunder, as they grapple with their growing desire for each other, their bodies yearning for a connection they know they shouldn't act upon.