When a child grows up, they learn how to share. To say please and thank you. To chew with their mouths closed, keep their hands in their pockets around breakable things. They learn how to emphasize, to understand body language, not to throw rocks. They learn to tie their shoes into bunny ears and say 'cheese' for the camera.
Marley learned all of those things, at some point or another. Most of them from her daycare and her school. She learned other, more unorthodox lessons from home.
One of them was: you're safest in a closet.