As their parents argue downstairs, the siblings sneak into the attic, their eyes meeting in shared curiosity. The girl, a pious virgin, feels her heart race as her brother's gaze lingers on her blossoming curves. She's been dreaming of his thick cock, and the tension between them is palpable. He tentatively reaches out, caressing her cheek, then her breast. She gasps, her nipples hardening. He leans in, their lips meeting in a forbidden, passionate kiss. She can't help but grind against him, feeling his hardness through their clothes. Their bodies press together, their breath ragged, as they give in to their taboo desires.