Savannah Chrisley cringes through a nightly parenting struggle with her sister, Chloe, that she chronicled on her Instagram story. The ‘Chrisley Knows Best’ stars can’t stop laughing as the 10-year-old spits out her retainer before bed. Savannah has been the legal guardian of both Chloe and their brother, Grayson, after their parents, Todd and Julie