In this intense, taboo encounter, a brother's lust boils over as he approaches his sister, his heavy balls aching for release. He grips his throbbing cock, stroking it roughly as he closes in on her. His sister, caught off guard, can only watch as he nears, his thick tip glistening with pre-cum. He doesn't stop, driven by primal desire, and with a final, forceful stroke, his balls tense and erupt, sending hot, sticky ropes of cum splattering across her face.