Duelo de Pasiones (2006 Spanish drama)

Álvaro Montellano’s life is poisoned when he reads a letter that convinces him his wife Soledad is having an affair with a farmhand named José. In truth, the letter was meant for his sister Mariana, but a jealous rival intercepts it and deepens the misunderstanding, driving Álvaro into a spiral of suspicion and cruelty. He banishes Soledad, rejects his daughter Alina, and turns his household into a place of punishment and fear.