She emigrated with her two sisters to the United States in 1959 and settled in Atlanta, Georgia, where she met her husband, a lawyer. At the age of 50 she was able to fulfil a lifelong dream: learning to paint and developing her talent. In 1980 she began studying with Ouida Cannady, who inspired her to trust her visions and ideas. Nieves loved travelling, to China, India, Europe and South America, and the influence of those journeys is very clear in her paintings.
She paints her emotions. When a painting begins, it has no fixed idea but a sense of what it wants to communicate. Freedom and nature are recurring themes in her work. She has won numerous awards: in 2000 she received prizes for three paintings at a global exhibition, the China Art Exposition 2000 at the Beijing Art Museum, where the paintings were then exhibited for a year.