'The Real Housewives of Salt Lake City' star Mary Cosby shares family updates with ET's Brice Sander at her home in Utah. Mary confirms she still has yet to speak to her own mother in more than two decades, as she celebrates her 26th wedding anniversary with husband Robert Cosby Sr. Their son, Robert Jr., is a major part of Mary's story in season 5 of the Bravo show; the trailer previews an emotional chat between the two, which served a turning point for the 21-year-old. 'RHOSLC' airs Wednesdays on Bravo, streaming next day on Peacock.