Oprah talks about the life-changing advice she received from her mentor Dr. Maya Angelou—"When someone tells you who they are, believe them"—and shares how she learned this lesson the hard way. Oprah also recalls teaming up with Dr. Phil to help engaged couple Angela and Eric confront mistrust and infidelity in their relationship. Then, Oprah revisits her interview with Dina McGreevey, ex-wife of former New Jersey Governor Jim McGreevey, who resigned from office after admitting to an affair with a man. Dina shares the secrets and signs of deception she missed in their marriage.