She's sitting next to him in her bed as they talk. Since his discovery that killing his brother, would in theory kill all vampires from his line, he's left with a dilemma. Keeping him daggered hurts Caroline, but if he's alive, there's a possibility for everyone to suffer. They're going to keep him daggered. They'll warn Caroline before he gets undaggered again, if at all. That brings her to another thought. Klaus isn't his only family alive.
He wants to find his siblings, and she wants to help him. But she can't leave Mystic Falls, she reminds him. He can come and go as he pleases, she cannot. She reminds him that he doesn't have to stay for her sake. If his siblings aren't in Virginia, she can't go with him. She has school and Jenna would be worried. Jenna. Another thing she needs to think on. She doesn't know when she should tell her aunt of their status, who she could keep the information safe with. They debate back and forth, weigh the pros and cons while covered with a comforter.
It's her decision, and she falls asleep before she can make it. Elijah yawns, and decides they can sleep on it.