In a cramped Brazilian apartment, siblings explore their forbidden desires. The brother, engrossed in porn, starts stroking his cock. His sister, overhearing his moans, joins him, curious and aroused. She watches as he pleasures himself, her own hand wandering between her legs. They share heated glances, the air thick with tension. Their bodies yearn for each other, but the taboo of incest lingers, leaving them teetering on the edge of sin.