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What to Know About ‘RHOSLC’ Star Mary Cosby's Husband Robert Cosby Sr.

On HALO

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The Real Housewives of Salt Lake City star Mary Cosby has had her husband by her side through all her ups and downs, both on- and off-camera. Viewers met Robert Cosby Sr. on the first season of the hit Bravo reality TV series. At the time, Mary revealed her marriage was “arranged,” adding that “it was kind of in my grandma’s will for us to marry.” While navigating the highs and lows of reality TV, Robert Sr. and Mary also raised their only child, Robert Cosby Jr., together. In January 2026, Mary opened up about her son’s substance abuse and mental health struggles as he found himself in jail....