As the siblings' argument reaches a fever pitch, their bodies press against each other, the heat between them palpable. The brother's hands find their way to his sister's hips, squeezing tightly as he grinds against her. She gasps, her hands clutching his shoulders, nails digging into his skin. "Fuck me, you fucking bastard," she hisses, her voice laced with anger and lust. He responds with a guttural growl, spinning her around and bending her over, their fucking rough and aggressive, filled with the words they've long held back, their bodies slamming together as they give in to their forbidden desires.