A brother and sister, sequestered together, find solace in self-pleasure. The sister's moans echo through the empty house as she explores her body, fingers dipping into her slick folds. Her brother, overhearing, bursts in, catching her mid-act. Angry words are exchanged, but the tension shifts when they decide to continue their pleasures openly. The brother's engorged cock stands at attention as his sister's eyes widen with desire. Just as they're about to cross the final threshold, a sudden noise outside forces them to halt their taboo tryst.