Lucy manipulates Charlie.
Following their discussion about death, Lucy decided to retaliate by hurting Charlie. Before she and Ethan powered down for the night, Lucy asked if Charlie could read Huckleberry Finn to Ethan, explaining that Julie had been reading the novel each night. Charlie obliged and went to grab the book from Julie's nightstand. Sadly, he found much more than he had hoped he would.
Underneath the book was a photo box, which Charlie opened. Inside were dozens of photos of Julie with John.
Lucy's plan to emotionally wreck Charlie had worked. The engineer started slamming back drinks, providing Lucy with the opportunity to make a different kind of move. She attempted to seduce Charlie, and the moment was captured by Ethan's robotic camera.
Could the footage be used against Charlie in the future, and, if so, for what?