updated 07/26/2012 AT 11:00 AM ET
•originally published 07/26/2012 AT 11:45 AM ET
While filming SWATH, Sanders, 41, seemed infatuated with Stewart, 22, but it never went any further, a source tells PEOPLE. One of the reasons could be that Sanders’s wife, actress-model Liberty Ross, starred alongside Stewart in the film, playing Snow White’s mother. Sanders even cast the couple’s two children, Skyla, 7, and Tennyson, 5, as extras in the film’s final scene.