The siblings, still bound by the police-issued cuffs, find themselves alone in the quiet house. The younger brother, his cock hard and aching, can't help but notice his sister's nipples hardening against her t-shirt. She catches him looking and blushes, but the heat in her cheeks only fuels his desire. He leans in, his breath hot on her neck, as he whispers filthy promises in her ear. She squirms, her pussy throbbing with need, as he grinds his cock against her. Their bodies move in a rhythm as old as time, their hands exploring each other's bodies, their kisses deep and hungry, as they give in to their forbidden lust.