Little Big Town’s Jimi Westbrook, and his wife and bandmate Karen Fairchild, are mourning the tragic loss of Westbrook’s sister Joyce Marie Westbrook Morgan this week. She died on Sunday (Nov. 29), after her brave battle with cancer.

Westbrook posted a photo of Joyce on Instagram and shared his story of what she was like as a big sister.

According to the obituary, the family requests that donations be made to the Sarah Cannon Research Institute at 250 25th Ave. North, Suite 100, Nashville, TN 37203.