The family of 1000-Lb. Sisters is mourning a painful loss after Amanda Halterman shared that their cousin, Katie Slaton, has died following a difficult battle with cancer. She was only 37, and her passing has left those closest to her devastated.

Katie, who appeared during season five of the TLC series after Tammy Slaton returned home from weight loss rehab, had become a familiar face to viewers. Fans connected with her quickly because of her warmth, her easygoing energy, and the close bond she shared with Amy and Tammy.