As the rain lashes against the window, two siblings huddle together under a blanket, their bodies pressed close for warmth. But the heat between them is far from innocent. She can feel his heart pounding against her back, his breath hot on her neck as he nuzzles her skin. He trails his fingers along her arm, sending shivers down her spine. She turns to face him, their eyes locked, and in that moment, they make their choice. The blanket falls away, revealing their naked bodies, and they come together in a feverish, passionate embrace, their moans drowned out by the storm outside.