She can tell when Elijah wakes up, the interactive city shifts slightly, and she finds him next to her. She thanks him for the city and asks if he slept well. He nods, and she smiles at him and he stops thinking for a moment. He updates her on things he thinks she'd be interested in. Caroline will go back to Mystic Falls with Bonnie, Jeremy and Alaric when their visit comes to an end.
Just for a few days. He shows her his mind palace, and is carefully unbiased as he tells her of the developments between his brother and Caroline. He updates her on the status of New Orleans and the Salvatores, still in Italy. He tells her everything he can think of, and gives her a tour of his mind palace. She notes the new details, and room with her name on it. She's curious but doesn't push.
They talk, for what seems like hours, but Elena can never really tell the time anymore-and the words she wants to say get trapped in back of her throat. It takes a few times to swallow them back down again, until she's ready to say them.