Emmerdale spoilers follow.
Emmerdale has shared a first look at Caleb Miligan and Tracy Robinson's Christmas storyline, which sees someone catch them in a compromising situation.
The pair have been enjoying a secret affair in recent weeks and have mostly managed to keep their passion under wraps, with Caleb's son Nicky the only person who currently knows the truth.
That all changes in Emmerdale's Christmas Day episode as Caleb and Tracy take a risk too far and have to face the consequences.
Caleb and Tracy both attend Christmas celebrations at Butler's Farm, where Cain and Moira Dingle play host.
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Caleb and Tracy share a charged moment alone during the festivities, which goes unnoticed by the other guests.
Later, when everyone is leaving, Tracy offers to stay behind with the kids.
Caleb agrees to stay back with Tracy, giving them the time alone that they'd craved.
As Caleb and Tracy give into temptation once again, it proves to be a major mistake as someone catches them in the act.
Related: Emmerdale reveals first look at Rhona and Marlon's Christmas shock
Who will rumble the pair – and will this person expose the truth to Tracy's husband Nate?
Emmerdale producer Laura Shaw recently told Digital Spy and other media: "We've started Tracy and Caleb's dangerous affair. We'll see a bit more of that in the run-up to Christmas.
"What we'll see is the most awkward Christmas dinner ever, where those lot are all sat round the table at the Dingles' together.
"Somebody on Christmas Day is going to find out their dark secret and threaten to blow that."
Emmerdale will air these scenes at 6.30pm on Christmas Day. The show will be airing a 30-minute festive episode this year, rather than the usual hour-long special.
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Emmerdale airs on weeknights at 7.30pm on ITV1, and streams on ITVX.
