She was the sole surviving sister of "The Mirabal SIsters", who were organized resistance activists fighting against the brutal dictatorship of
Rafael Trujillo of the Dominican Republic. The senseless murder of her three sisters Minerva, Patria, and Maria Theresa by henchmen of the dictator on November 25, 1960 resulted in the fall of Trujillo six months later and the return of democracy to the Dominican Republic.