The Real Housewives Of Salt Lake City star Mary Cosby has shared the story behind her marriage to her step grandfather, Robert Cosby Sr.The couple married 21 years ago following the death of Mary's grandmother, who wanted her husband to marry one of her 'girls' in the event something should happen to her.'We were kind of a, I would say, an arranged marriage,' Mary said in a teaser obtained by People. 'It was kind of in my grandma's will for us to marry.' 'It was kind of in my grandma's will': The Real Housewives Of Salt Lake City star Mary Cosby has revealed the story behind her marriage to her step grandfather, Robert Cosby SrRobert said his late wife was behind the marriage.'She said, "If anything ever happens to me, Bobby, I want you to.
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