Princess Prosecutor Episode 8 Who is the man the lawyer met?

I don't know if you want to ask their real names or their names in the play. In the eighth episode, he met several men, Jin Shidong is the one who likes to take candid photos, another is an elder sister he met as a writer, that man is his elder sister's husband, and another is a man in memory, which should be his father. He is recalling the scene of his mother's car accident.