When Tom goes missing, Darren is desperate to find him. Thinking that Tom has run away, he assumes that he will come home if Nancy is there and convinces Sienna to change her statement about Nancy. Nancy is released from the mental institute because of this. However, it is revealed that Sienna actually kidnapped Tom and kept him hostage in a basement. Tom is able to escape and along with Nancy, they expose Sienna for everything. Sienna attacks Nancy causing her to have temporary brain damage and attempts to kill Tom, Charlie and Oscar although they are saved and Nancy recovers. Following Darren's treatment of Nancy, things are hard between them and get even worse when Nancy attempts to get revenge on Darren. However, they eventually reconcile and get engaged again. However, things only get worse when Sienna blackmails Darren to get Tom to change his statement or she'll create even more problems for the Osbornes. Following a heart attack, Darren is given angina spray however Sienna takes this while Darren is on a camping trip and Nancy leaves him on his own on the trip following an argument. Darren starts to have a heart attack and Sienna, realizing what she's done, saves him at the last minute.