Una muchachita de Valladolid
Mercedes is a very simple girl from Valladolid who marries a plenipotentiary minister. They are in America with the mission to seize some oil concessions. Patricio is forced to seduce the wife of a Chancellor as Mercedes, casually gets more information of the diplomat.
Starring Alberto Closas, Analía Gadé, Lina Rosales, Alfredo Mayo, José Luis López Vázquez, Vicky Lagos
Watch "Una muchachita de Valladolid" on FlixOlè released in 1958. It's a comedy and drama movie, and has a rating of 5.2 out of 10 from Imdb which is fairly okay for this kind of movie.