The couple came clean in typically explosive fashion when Harriet was hospitalised after being stabbed by brutal drug dealers as part of Robert Sugden (played by Ryan Hawley) and Ross Barton’s (Michael Parr) petty war.
In turn, Cain kidnapped Ross and threatened to kill him while Harriet’s life hung in the balance.
The local vicar copping off with Emmerdale’s resident bad boy was always going to come with its perils, but Ross may have already put out the fire that is “Charriet” as Cain keeps his altercation with the Barton a secret.
“The thing that he did with Ross, he kind of acted impulsively and it's because he nearly killed his girlfriend,” Cain actor Jeff Hordley explained. “Why he does it in his mind is the right thing, it's only afterwards that he thinks, ‘Oh I probably won't tell her that.’”
Emmerdale spoiler: Harriet Finch and Cain Dingle to split over this MASSIVE Ross Barton bombshell
Emmerdale spoiler: Will Harriet Finch and Cain Dingle split over Ross Barton?
She saw all of that happen when she was in the force
Katherine Dow Blyton
Harriet star Katherine Dow Blyton added: “It disappoints Harriet that he has done that as she hates violence, especially as she has just been stabbed so it has upset her that he has seen that as the answer.
“She saw all of that happen when she was in the force.”
What’s more, Jeffrey added that there is only so much of Cain’s reckless behaviour former police officer Harriet will tolerate.
“Yes there is that but that was always the case with Moira as well,” he said. “It was always a case of, ‘Hmm, I better not let her know of that.'
Emmerdale spoiler: Will Harriet Finch and Cain Dingle split over Ross Barton? Emmerdale's most shocking moments Thu, January 5, 2017
Emmerdale's most shocking moments: Explosions, car crashes and murder – life in the Dales is never dull. Here are the most dramatic scenes from the popular soap.
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Emmerdale's most dramatic moments
“The DNA of the character is never going to change. He's always going to tell a few lies here and there to do with what he does. He's not a car mechanic – he also does things kind of above the law.
“There are things that Harriet can give Cain and Cain can give Harriet – they can teach each other new ways!”