Yukino def loves him but she hates the kind of woman she’s become because of this love. That night, she was willing to commit adultery so she can stay longer with him. Morning comes and she made a resolve to be his mistress, then he clears the misunderstanding and guilt came over her like a cold splash of water then she realize it’s not too late to go back from this relationship before she gets in way too deep. She doesn’t want to fall any deeper cause the stronger her love the worse kind of woman she becomes.