Real Housewives of Salt Lake City cast member Mary Cosby says she and husband Robert Cosby Sr. sleep in separate bedrooms
Mary Cosby is upset that she didn't get the chance to explain her "unconventional" marriage to her grandmother's husband
Mary Cosby was only 22 when she married her step-grandfather Robert Cosby Sr., now 62
Mary Cosby explained her "arranged marriage" to her 62-year-old husband, Robert Cosby Sr., on Real Housewives of Salt Lake City