Adeline wanted to ask Theodore the same question that was bothering her. She wanted to ask him whether he would keep on loving her even when she would grow old and feeble, and even when she wouldn't be able to recognize him anymore.
But she hated that thought herself and she didn't want to make Theodore sadder when he was already sad thinking about his family. She knew he was sad no matter how much he denied it. A family was still a family no matter how much pain they caused you.
Theodore noticed how stiff she went after he whispered to her saying how he wished that she would be by his side forever. He knew that it was impossible since she was a human. But he couldn't help but dream that his loving and caring woman would stay by his side for eternity. He wished there was some way.
