In January 2013, Nancy Darren and Oscar went to visit Ruth in London. In June, Nancy and Darren's marriage came close to breaking as Darren found out the full extent of Nancy's pill problems when Sienna Blake (Anna Passey) tricked him into hiding a present in Nancy's laptop bag, knowing he would find pills. Nancy’s mother dies in a car accident and before leaving for Canada, Nancy tells Sienna to take care of Darren. Nancy returns but is shocked to find Darren and Sienna in bed. In August 2013, Nancy is devastated when Sienna announces that she is pregnant with Darren’s baby. Sienna tells Nancy that she can take Oscar and Charlie, but when Nancy leaves with the kids, Sienna harms herself to make it look like Nancy attacked her, and then tells the police that she has kidnapped them. Police start searching for Nancy, who hears on the radio that they think she kidnapped the children. After being chased by police, her car is suspended over a multi-story car-park. She, Charlie and Oscar escape before the car goes over. Upon giving Charlie and Oscar to Darren, she furiously scolds Sienna about the lie she made before Nancy being arrested. She is later sectioned in a psychiatric ward. In October 2013, Tom visits Nancy as a wish from John Paul McQueen (James Sutton), where Tom breaks the news that Sienna has been doing some things whilst she was absent. When Tom goes missing, Darren convinces Sienna to change her statement so Nancy can be released. Nancy returns to the village and unknown to her and everyone else, Sienna is holding Tom hostage in the basement of her childhood home. Tom escapes and finds Nancy who confronts Sienna infront of everyone. Sienna tries to tell them that Nancy is lying again and Nancy furiously attacks her before ripping of her dress, exposing her fake pregnancy to the guests.