The scent of aged wood and dust can't mask the musk of their arousal. The girl, her skin glistening with sweat, leans back, her eyes closed, as her brother explores her body with tentative fingers. He traces the curve of her breast, the dip of her waist, before lingering on the heat between her legs. She gasps, her hips bucking, as he finds her clit, his touch clumsy yet eager. Their breaths come in ragged pants, their bodies slick with need, as they dance on the precipice of taboo, their hearts pounding with fear and desire.