Meri Brown, a central figure in the polygamous family featured in the reality TV show “Sister Wives,” has shared a heart-wrenching post on Instagram, mourning the loss of Robert Garrison Brown, the son of Kody Brown and Janelle Brown. In a touching tribute, Meri Brown posted a photo of Robert Garrison Brown during his time in the National Guard, accompanied by a poignant caption: “Our family is deeply saddened to announce the loss of our beautiful boy, Robert Garrison Brown. He was a bright spot in the lives of all who knew him.” She added, “Garrison, you are loved and will be missed! 💙💙” The …