Something is up with mirrors, and mom realizes the woman in the yard is her own confused, chicken-murdering self, or rather her suicidal ideation incarnate, and that she’s trapped in the mirror world, like if Us was 100x less interesting and featured Nosferatuan shadow-snatching. Yard Woman never seems to do anything, but all the pets are dead and everyone’s hurt and she’s spreading family discord, letting the days go by. Her first words are “how did I get here?” Mom saves the day by time-tunnelling into the gun locker(?). Cameo appearances: before dad’s fatal car crash they park outside a movie theater showing The Mirror Has Two Faces… and was that a Uneeda Biscuit canister in their shed?