Unfortunately, things take a very awkward turn when Louis and Simone return after forgetting something, which leads to them walking straight in on the passionate moment.
Terrified that he'll be accused of committing incest, Zack immediately tells his parents that 'Lisa' is an impostor, but he begs them to give Sonia the chance to explain herself before they call the police.
When the Lovedays do confront Sonia, she admits that the real Lisa is still alive and out there somewhere, sending their emotions into overdrive.
Wanting to help as best she can, Sonia soon visits Joanne Cardsley and begs her to support the Lovedays by telling them that she knows Lisa's abductor Margaret.
It's not long before Louis, Simone and DS Thorpe all confront Joanne with some tough questions to ask, but just how honest will she be? And when Margaret asks Joanne for money so that she can flee with the real Lisa, where will Joanne's loyalties lie?
Airs Monday, April 11th, Tuesday, April 12th and Thursday, April 13th