Who is the joker?

During the weekend, Leo Young worked in the study, while Barbara Jones sat on the balcony and read a book.Although it looked rather tasteless, Barbara Jones liked this kind of peaceful days very much.Today, Leo Young suddenly asked to go out for a walk. Was he apologizing for the matter last night?Regardless of these, Barbara Jones thought that he was so, and showed a smile deliberately. Then she said, "I have something to discuss with someone in the afternoon. Shall I go out with you later?""OK." Leo Young nodded and did not say anything else. Then, he turned his head and looked out the window.Looking at his lonely back, Barbara Jones suddenly felt a little upset, and added, "I'm just going to talk to that person, and it won't take much time."