Mary Cosby used her platform on The Real Housewives of Salt Lake City to get candid about motherhood and her son, Robert Cosby Jr.'s substance abuse struggles. "It's a heavy topic," Mary exclusively told Us Weekly in November 2024 when discussing her son's addiction and sobriety journey. "But for me, because it all just came at once on me, I didn't expect it, but I'm taking it day by day." The Bravo cameras rolled as Robert Jr. opened up about his personal hurdles.