Han Ji-wan

No Yeong Won, a famous psychologist, seems to have it all—a successful career and a loving husband, Choi Jae Jin, a top doctor. But her perfect life falls apart when she finds out her husband is having an affair with Lee Sae Na, a mysterious woman. As things spiral out of control, No Yeong Won teams up with her mother-in-law, mystery writer Hong Sa Gang, to try to save their family. (Source: MyDramaList)