<P> In the 2000--2001 season, Abby is visited by her mother, Maggie (Sally Field), who suffers from bipolar disorder . Abby's childhood is revealed to have been very difficult: she was forced to cope with her mother's erratic behavior and long absences and had to take care of her younger brother Eric (Tom Everett Scott). Eric is introduced in later episodes . He is in the US Air Force but goes AWOL and is showing signs of bipolar disorder . He refuses to accept it and clashes with both Abby and Maggie as a result . Abby eventually reconciles with her mother during the beginning of Season 13 as Maggie is taking medications for her disorder regularly, and Abby is grateful for her support when her son Joe is born prematurely . </P> <P> Abby's father, Eddie, left the family when Abby was a child, due at least in part to Maggie's uncontrollable behavior . Abby reunites with her father (Fred Ward) in season 13, when he initially approaches her under the guise of being a patient named Eddie Jackson before finally revealing his true identity to her . Abby tells him to stay away from her, although she later considers inviting him to her wedding . </P> <P> Abby dates Dr. Kovač, Dr. Carter and Jake, a medical student, but eventually returns to Kovač, with whom she has a son . They later marry . She befriends many colleagues in the ER throughout the series, particularly female co-workers such as Carol Hathaway and Susan Lewis, and later Elizabeth Corday and Kerry Weaver . Her closest friend is Dr. Neela Rasgotra, who graduates medical school with her and lives with her during some of Neela's hard times . As Carter is phased out of the show and Weaver departs midway through Season 13, Abby and Luka Kovač are the senior figures on the show until their departure in 2009 . </P> <P> Prior to beginning medical school at County, Abby was married to Richard Lockhart; she and Richard were expecting a child at one point, but Abby chose to have an abortion, since she was afraid the child would be bipolar like her mother . Abby never told her family about the pregnancy and Richard was unaware of it until after the abortion . The marriage began to break down after a short time, with Richard frustrated at Abby's abortion and depression, and Abby angry over his insensitivity, since she was working overtime at home and at work to help pay for his medical schooling . They finally split for good when Richard cheated on her and part of the divorce agreement was that he would pay for her medical schooling . Abby chose to keep her married name of Lockhart, claiming "it's the only good thing I got out of the whole mess ." </P>

Do abby and luka get married on er