A step-sister's innocent touch ignites a inferno of lust. She tentatively reaches out, her soft hand wrapping around her brother's rigid shaft. His sharp intake of breath emboldens her, and she begins to stroke, her grip firm yet tender. She explores his length, her thumb tracing the bead of precum at his tip. Their eyes lock, the air thick with tension. His hips buck slightly, and she smiles, her own body responding to the power she holds in her hand, the taboo of their act only heightening their arousal.