John Wayne's in-law?

A minor role is "Dark Command" is credited to BOB SAENZ. If this Bob Saenz was a brother of Josephine Saenz, that would make Bob the brother-in-law of star John Wayne (who at that time was married to Josephine Saenz)...? -- Prof Steven P Hill, Cinema Studies, University of Illinois "S(DASH)HILL4(AT)UIUC(DOT)EDU"