In "I Have a Lover" Park Han Byul asked Lee Kyu Han whether Kim Hyun Joo had a twin sister.
On the episode of SBS "I have a Lover" (script Bae Yoo Mi, director Choi Moon Suk) broadcast on October 17th, Baek Suk (played by Lee Kyu Han) went to see Kang Sul Lee (played by Park Han Byul).
On this day, Baek Suk made a sudden visit. At this, Kang Sul Lee said, "What had happened. Without a phone call. What were you going to do without me." Baek Suk said, "Now that I think about it, before that incident with the wallet, there was a call to my office. That person asked for a person named So Hye Kang. Is that guys' wife's name Do Hye Kang?"
Kang Sul Lee answered to the question whether Do Hye Kang and Dok Ko Yong Ki looked similar. To that question, he said, "They do look similar but they're different people. She's a woman that is completely different than Yong Gi . She's cold and chill and tough."
At this, Kang Sul Lee said, "Have you ever heard that Yong Ki has a sister or twin when you were dating her?" Baek Suk said, "She said she lives with her grandmother. From when she was little straight."
