Amanda Edwards / Getty Images Real Housewives of Salt Lake City star Mary Cosby is mourning the sudden loss of her 23-year-old son, Robert Cosby Jr ., sharing a brief but heartbreaking tribute just days after his death on Monday. The 53-year-old took to Instagram Friday night, posting a throwback photo of herself and her son smiling together. The image was set to a remix of “Time After Time” by Jessica Mauboy—a nostalgic choice that served as the background to her emotional post. “I’m going to Miss My bubs,” she wrote simply, adding a prayer hands emoji alongside a string of hearts and teary faces. Read more at The Daily Beast.