Any information Catalina Lopez de Castro m. Juan Perez de Frias

Hello,

I descend from Juan Perez de Frias and Catalina Lopez de Castro. I was wondering if anyone had any information regarding the ascendancy of Catalina Lopez de Castro. I have connected Juan Perez de Frias as the son of Diego Perez de Frias and Elena de Sotomayor.

Also does anyone have access to Diego and Elena's marriage document?

Thank you,
Alex