Kelly confides in Brenda and Donna about her mother's pregnancy, but they can't keep a secret. David tells Donna that Mel is planning to propose, then learns about the pregnancy. He doesn't share the news with his father, who is clueless about Jackie's condition. Jackie assumes that Mel only wants to marry her to fulfill his obligation, so she dumps him. Music: ""All 4 Love"" by Color Me Badd (#1, 1992);