Eileen Hayward is the wheelchair-bound wife of Will Hayward and mother of Donna, Harriet, and Gersten. Highly tolerant and decent in every sense, she seems to have an itching past concerning Benjamin Horne.
On February 24, the night after Laura was killed, Eileen sat with her husband in their living room, listening to him go over the events that occurred previously in the day, including the discovery of Laura's necklace at the murder scene, which was not a detail that had been released to the public. He also said that they believed the killer may have been in possession of the necklace's other half.
In the morning, Donna came downstairs, asking why she had not been woken for questioning as FBI Special Agent Dale Cooper had ordered the night before. She told her daughter that the sheriff's office had called saying they could wait until the next day. Donna then told her what she was feeling, including her budding romance with Laura's secret boyfriend, James Hurley, whom she had gone out to meet with the night before. James later came over for dinner and met Eileen and her husband. After dinner, she went to bed with her husband, leaving Donna and James alone.
Over a week later, Eileen attended the reception after the funeral of Leland Palmer, who was arrested for his daughter's murder and died in custody three days prior. She helped comfort his widow.
A few days later, Eileen and Will arrived home from a trip to the grocery store, and Donna told them they had a visit from Gerald Craig, an old colleague of Will's. However, he said that this was impossible due to Craig dying many years before. Eileen called the phone number left by Craig and found that it was the number for a cemetery.
Later, the doorbell rang at her home and she went to answer. Benjamin Horne entered and whispered to her, concerning their former affair. She went to his office at the Great Northern Hotel the next day to give back love letters he had once written to her.
At dinner the next day, Donna asked her how she knew Ben Horne. Will mentioned the "Heal the Planet" charity, to which she said was the reason for Horne's visit.
A couple of days later, Donna came down to the living room, dressed up for the Miss Twin Peaks Contest. Eileen requested to hear her speech, but Donna wished to talk about the truth of Eileen's involvement with Ben Horne. Eileen and Will refused to reveal any information to her, so she left.
After Donna confronted Horne at the contest, she came home and started packing her bags. She came down the stairs of their home, ready to leave, Ben declaring that he wanted to tell the truth, but Will arrived and was angered by Ben's presence. Horne's wife, Sylvia then arrived, upset with Ben, then Will then punched him, causing him to hit his head on the fireplace.