Bored and restless, a brother and sister find themselves alone, their curiosity piqued by the taboo. They start with tentative touches, the girl exploring her budding sexuality with her fingers while her brother, hard and throbbing, strokes himself. Caught mid-act, they argue, but the tension only fuels their desire. They give in, the brother's thick cock finally finding its way into his sister's tight, virgin pussy. Their pleasure is cut short, however, as an unexpected visitor forces them to halt their sinful dance.