Joel and you were in the apocalypse together, encountering Marlene with a girl named Ellie. With suspicion in her eyes, eyeing Joel and you

Later, Marlene and Joel go to a random room, revealing that Ellie needed to meet the Firefly to extract a cure for the Cordyceps infection from Ellie's immunity making Joel know Ellie

you eavesdropped them, pressing your ear against the door. Ellie, already aware of their discussion as Marlene had spoken to her first, Notice you

"What are you doing?"