After 27 years, Real Housewives of Salt Lake City star Mary Cosby and her husband, Robert Cosby Sr., continue to defy expectations. Their unique bond, forged through an arranged marriage outlined in her grandmother’s will, has evolved into a deep, supportive partnership, recently highlighted by Robert Sr.’s pivotal role in their son Robert Jr.‘s sobriety journey.
For fans of The Real Housewives of Salt Lake City, Mary Cosby has always been a captivating figure, known for her unique style, spiritual leadership, and perhaps most notably, her unconventional marriage to Robert Cosby Sr. As of 2025, the couple marks 27 years of marriage, a significant milestone that continues to spark conversation and curiosity among viewers.
The genesis of their union is a story Mary has openly shared since her debut on RHOSLC in 2020. Their marriage, as Mary describes it, was “arranged” and was part of her late grandmother’s will. Robert Sr. was previously married to Mary’s grandmother, Rosemary, and is 20 years Mary’s senior. This unique dynamic, where Robert Sr. is also Mary’s step-grandfather, has been a central topic of discussion.
Mary elaborated on the specifics of this arrangement in a video for BravoTV.com, stating, “You’re dealt with the cards that you’re given and it’s up to you to make it happy.” Robert Sr. recounted his late wife’s wish: “She said, ‘if anything ever happens to me, bobby, i want you to marry one of my girls because they’ll look out for you.'” Mary added that they were “blessed to this day because of it” and that she was “so glad [she] did it.”
An Evolving Love Story: From Arrangement to Deep Connection
Despite the unconventional start, Mary revealed that her love for Robert Sr. wasn’t immediate but developed over time. In an interview with Us Weekly magazine, she shared that she fell in love with him “two or three years” into their marriage. This shift, she explained, coincided with her desire to have a son.
“We were best friends. We traveled everywhere. We seen everything together and then I just got ‘mommy hungry’ and I really wanted a son,” Cosby recalled. It was this craving for motherhood and family that solidified her commitment and love for Robert Sr. They share one son, Robert Cosby Jr., and Mary has consistently expressed no shame or regret about her decision, believing she “got it right.”
Navigating a Unique Marital Dynamic and Finding Happiness
The couple’s marriage has also been notable for its distinct personal dynamics. During a RHOSLC reunion, Mary confirmed that she and Robert Sr. have separate bedrooms and have not been intimate in the “last few years.” While this may seem unusual to many, Mary firmly states that it works for them and that she is genuinely “happy.”
“We’re happy,” she said emotionally during the reunion, holding back tears. “You can’t say or do anything to take happiness away from me. It’s hard to get. If you can find that in a man, it doesn’t matter where he came from.” This perspective underscores Mary’s belief in her unique path to marital bliss, regardless of external judgment. She maintains that despite any non-traditional aspects, she has a “beautiful” marriage.
Family Support and Robert Sr.’s Role as a ‘Rock’
Beyond their personal relationship, Mary and Robert Sr. are deeply invested in their family, particularly their son, Robert Jr. In a recent exclusive with People, Mary highlighted Robert Sr.’s invaluable support, especially as they navigate Robert Jr.’s sobriety journey. “He always knows what to say, and he always knows how to say it,” Mary shared, calling him “our rock.”
Mary also revealed that Robert Jr. recently got married to his girlfriend, a union that Mary initially learned about a year after it happened. His wife now resides with the family in their vibrant Utah home, described by castmate Heather Gay as having “green carpet, chanel pillows, dr. seuss chairs from whoville,” and “tiffany blue cabinets.”
The bond between Mary and Robert Sr. remains strong, with Mary expressing, “I see us just getting old together, and I’ll be always standing there. He’s just this solid piece in my life and my son’s life, and we couldn’t do it without him.” This sentiment underscores the enduring foundation of their relationship.
Life Away from the Cameras
While Mary Cosby is a fixture on RHOSLC, Robert Sr. prefers to stay out of the spotlight. Mary shared that he “won’t come on the show for anything,” viewing it as “for women.” Similarly, Robert Jr. is not a fan of the reality series, telling his friends not to watch it because he feels his mother’s castmates are “mean” to her. His protective nature highlights the family’s insular approach to public life, valuing their private happiness above all else.
As Mary and Robert Sr. continue their journey of 27 years, their marriage stands as a testament to finding love and happiness in unexpected forms. Their story, openly shared with the world, offers a unique perspective on commitment, family, and personal fulfillment within the fan community of The Real Housewives of Salt Lake City.
