Sandra, the naughty stepsister, believes she's home alone and decides to indulge in some personal time. She's in the bathroom, fingers buried in her wet pussy, when John, her stepbrother, bursts in. Caught red-handed, Sandra's embarrassed but John's intrigued. They argue, but the tension's palpable. Later, they find themselves alone again, this time John's jerking off, his thick cock throbbing. Sandra can't resist, she joins him, but their moment's interrupted by a creaking floorboard.