Home and Away spoilers: WHO catches Colby and Mackenzie together?

The secret is out on Home and Away when someone exposes policeman Colby's secret relationship with Salt boss Mackenzie. But WHO finds out?

Dean Thompson (played by Patrick O’Connor) has been keeping his distance from his half-sister Mackenzie Booth (Emily Weir) on Home and Away, after all the trouble she caused by blackmailing their hated politician dad, Rick Booth.

However, Dean is surprised to discover Mackenzie and Rick have called a truce after Rick filed charges against his daughter for swiping $80,000 from one of his bank accounts. So after a heart-to-heart with his girlfriend Ziggy Astoni (Sophie Dillman), Dean decides to give his relationship with Mackenzie another chance.

Unfortunately, in a case of terrible timing, Dean heads over to visit Mackenzie just as she’s getting passionate with Dean’s policeman pal Colby Thorne (Tim Franklin)…

Home and Away, Dean Thompson, Mackenzie Booth

It doesn’t take Dean long to guess what’s going on when he catches his sister Mackenzie wearing Colby’s police uniform on Home and Away… (Picture: Channel 5)

As Dean reels from the revelation his best mate and sister have been secretly hooking-up, does this mean the family reunion ain’t now happening?

Home and Away, Irene Roberts

Irene is on edge at the Diner on Home and Away after she overhears policeman Colby reveal it is only a matter of time before the police find out who was responsible for the attack on stalker… (Picture: Channel 5)

Meanwhile, Irene Roberts (Lynne McGranger) is pushed closer to the edge when she discovers the police found stalker Tommy’s (aka John Doe) car abandoned on the street where Irene lives.

Afraid it’s only a matter of time before the police connect both Irene and teenager Bella Nixon (Courtney Miller) to the attack on Tommy, Irene leaves a panicked message for Bella, urging her to come home to the Beach House so they can get their story straight if anyone starts asking questions.

But how much longer can the pair keep their SHOCK secret?

Home and Away, Ryder Jackson, Raffy Morrison

Raffy was crushed when boyfriend Ryder broke-up with her on Home and Away. (Picture: Channel 5)

And Marilyn Chambers (Emily Symons) does her best to cheer-up foster daughter Raffy Morrison (Olivia Deeble) after she discovers Raffy and her boyfriend Ryder Jackson (Lukas Radovich) have broken-up. Is it really over between Raffy and Ryder?

Home and Away continues weekdays at 1:15pm and 6:00pm on Channel 5