In the quiet of their home, a brother and sister find themselves with some unsupervised time. Bored and horny, they each retreat to their rooms, the boy stripping off his clothes and stroking his growing erection. His sister, in her room, slips her hand under her skirt, rubbing her wet panties as she listens to her brother's faint moans. Their shared lust hangs heavy in the air, but they remain separated, each lost in their own pleasure.