Her husband was a militant communist, and, at his side, Parra became involved in the progressive movement and the Communist Party of Chile, taking part in the presidential campaign of Gabriel González Videla in 1944.
Se separaron en 1948, pero antes, Cereceda, que milita en el Partido Comunista, iniciaba a Violeta en la actividad política y ambos participan ayudando en la campaña presidencial de Gabriel González Videla (1946).