Low Life(1990)

Original title: Boca do Lixo

Cláudia Toledo, a former sex symbol and a struggling actress, sees a chance to transform her life when a wealthy businessman proposes to her. What initially seemed like a dream marriage quickly unravels into a deceptive scheme, as Cláudia discovers the union is a sham to maintain appearances. She ends up falling for Tomás, a seductive construction worker, who convinces Cláudia to plot a murder to inherit her husband's fortune.