Jacob, confident and erect, grips his immense cock with both hands, stroking it vigorously. His sister Melanie watches, entranced, as he pleasures himself, her eyes fixed on his throbbing length. She can't help but lick her lips, her own arousal evident in her flushed cheeks and heaving breasts. Jacob's grunts fill the room as he picks up the pace, his balls tightening, ready to explode.