In a way, Caitlyn is living her life for her deceased mother similarly to how Eli is living for Lyle. Both of them want to make another person proud and make that person’s sacrifice worth it. Caitlyn has already figured out how to do that by throwing herself into her career. Eli is still young and he hasn’t quite gotten there yet, but he now knows that he and Caitlyn have more of a connection than he previously thought. This makes him believe that they belong together—another sign of how much Eli trusts August’s premonitions.