In the dim light of their shared bedroom, a brother and sister, both in their late teens, find themselves drawn to each other's bodies. She's a lithe brunette, he a muscular blonde, their features echoing their shared lineage. He's been caught watching her masturbate, and now, the tension between them is palpable. They sneak touches, stolen kisses, their breath hitching with each illicit caress. His cock tents his boxers, her nipples harden beneath her silk nightgown. They're playing with fire, but the taboo only serves to stoke their desire.