She was born circa 1737. Her father was Sebastian Flores de Abrego, and her mother was Francisca Javiera Flores de Valdez.
In 1745, she requested a dispensation to marry Carlos de Alderete y Guerrero in Saltillo. She was 8 years old, and the groom was 25 years old. Dispensation source: Guerra, et. al., Index to the Marriage Investigations of the Diocese of Guadalajara, p.266link.