At the end of the thirteenth season, Abby and Luka plan to honeymoon in Hawaii. However, the night before they are due to depart, Luka receives a phone call from Croatia informing him that his father is ill, so the honeymoon is put on hold until Luka can return from his urgent trip abroad. After Luka 's departure, Abby has a tough time with the stern new ER Chief Kevin Moretti, who plans to mold the department into a more efficient and professional work environment, but Moretti quickly tells Abby he is very impressed with her work. Despite this, she seems to dislike him more than many of the other residents. In season 14, Abby is struggling to deal with Luka 's absence, raise Joe and work at the ER; in "Gravity '', Joe is injured after falling off a jungle gym at the playground and Abby ends up falling back into drinking at the episode 's end. She approaches Dr. Janet Coburn (the O.B. Chief) who appears to have been her AA sponsor in the past. Abby 's drinking problem continues to escalate, and she realizes how bad it is in "Blackout '' when she shows up drunk to a party in honor of Pratt and Morris passing their boards. Abby finds herself waking up at 3am in Moretti 's apartment realizing, after sobering up at the airport when trying to find a flight to Croatia to see Luka, that she slept with him.
who did abby on er have an affair with
ER Chief Kevin Moretti