When she closed her heart of; and abandoned everyone. She was close despite her initial resistance to accept him. But even then she couldn't do it. She couldn't kiss or engage in any intimate actions in the arms of someone who isn't her beloved. She couldn't. Even the comfort Ryuuji's embraces gave her seemed lacking.
"Before I could have, no even then, I pulled away from you. It's silly, but I still love Yuhi. Even though it was a redemption journey, I just came back from it only to have the same answer as I did in the beginning."
"I have always known that. That you love him, and that your journey was meaningless. I do not wish to hear your response. Rather I will emphasize this now, never respond to him. Find a way to brush it off."
"Lucifer...."
"I shall become your substitute. Anytime you wish, I shall whisk you away. You shall always have an alternative."