I've been serching for either the name of the theme music to the Mexican TV Soap Opera "El Maleficio" (1983), or the name of the Composer, author, etc...!
Beatriz is a widow who is dedicated to raising her children, Vicky and Juanito, along with her mother-in-law Doña Emilia. Beatriz marries Enrique, later discovering the satanic treatment that her husband has in exchange for money.