Nancy is angry when Darren lies again after stealing from the loft. She suggests they should go to couple’s therapy but Darren objects to the idea. At their friends, Mandy and Luke Morgan's (Gary Lucy), wedding, Nancy is furious when she discovers that Darren knew Luke was already married. She tells Darren their marriage is over and Darren sleeps with Mandy. The next day, Nancy tells Darren they should give their marriage another chance, unaware of his one night stand. Darren and Mandy start an affair behind Nancy and Luke's backs. Nancy and Darren go on a romantic getaway. On their return, Nancy confides in an uncomfortable Mandy that they didn't have sex once while they were there. Nancy asks Darren why is he keeping his distance, so Darren organises a romantic meal for Nancy. However, she suffers an MS attack, leading Darren to think he has been stood up. Nancy starts receiving letters from Becca's killer, Fran. Darren finds a letter and confronts Fran telling her to stay away but Nancy walks in. She tells Fran not to contact her again and leaves visibly distressed. Nancy is being watched by an unknown person who reveals herself to be Fran's daughter Brooke Hathaway (Tylan Grant). Brooke tells Nancy that she needs to forgive Fran because she is dying. Darren is against the idea but Nancy goes to see her anyway. Nancy confronts Fran and Fran apologises and explains that she was a bad person back then and reveals that Brooke is autistic. Later, Brooke asks Nancy if Becca would want her to forgive Fran and Nancy says she would just as Fran dies. Nancy is concerned over Brooke's welfare and decides to foster her but Darren doesn't agree. They are forced to tell Charlie what happened to Becca after Brooke tells him. Nancy and Darren argue and Darren decides they should split up. Darren meets up with Mandy and they decide to run away together just as Nancy suffers an MS attack and is rushed to hospital. Nancy reveals to Darren and Jack that she will be in a wheelchair for a while. Darren packs his bags and leaves a note for Nancy but after she breaks down in front of him, Darren decides to stay with her and breaks up with Mandy.