After the birth of his daughter Jennifer, Bill's wife Laura fell into a deep depression, but overcame it with Bill and Dr. Marlena Evans help. In 1978, Bill began having an affair with coworker Dr. Kate Winograd. He eventually left Laura to live with Kate, but when he realized he still loved Laura he returned to _her_ and tried to repair their relationship. <sep>, Pronoun: her <sep>, A: Kate <sep>, B: Laura