Don’t you fear that maybe tomorrow …

Of course, she cared. She had always cared, even when she was denying her feelings and emotions for him. How can she not? She wasn't as heartless as him. 

She would have accepted it saying that yes, she cared for him but now, hearing no concern for himself in his tone, she was feeling aggravated. Looking at him, she boldly shook her head. "I am crying over my own stupidity. How easy I made it for you to dupe me. Was it fun?" 

Lu Xifu just wanted to ease her up with his teasing but what she spoke to him seemed like a serious accusation. And she looked upset. "How did I dupe you?" He asked, both interested and concerned.