Maria Corral (Widow of Diego de San Martin) marriage to Antonio Gutierrez.

Hi all Im hoping someone can help me with any info on the marriage of Maria Corral and Antonio Gutierrez. In the book "Encomenderos de la Nueva Espana" and in "Who's who of the Conquistadors" they are listed as a marriage and they had encomienda in Mizquihuala in the mid 1500's. Any leads or help will be appreciated. Gracias Jose Michel