text: RHOSLC’s Heather and Meredith React to Mary’s Sad Moment With Robert Jr.
  
  Koury Angelo/Bravo The Real Housewives of Salt Lake City’s Heather Gay and Meredith Marks are rallying around their costar Mary Cosby. The Bravolebrities praised Mary, 52, and her son, Robert Jr., 21, for their emotional…