Matty Barton is no stranger to secrets, having transitioned from female to male without telling any of his own family - not even mum Moira.
But next week, he finds out that his mum has secrets of her own.
In scenes due to air on Thursday (20 September), Matty's suspicions are aroused when he overhears a conversation between Moira and step-dad Cain at Butler's Farm.
And it becomes clear that they are discussing something secretive within the family.
Ruffled by the knowledge - or lack of it - he decides to confront the pair about what they are hiding.
He demands they tell him the truth... But will they?
The 'secret' couldn't come at a worse time for Matty, played by Ash Palmisciano, as he's just starting to feel settled in the village again.
All will become clear in upcoming episodes, but Emmerdale fans know they are more than a few skeletons in Moira's closet.
Or is Moira hiding a more explosive secret?
Matty and Moira have had a rocky relationship ever since he returned to the village.
Moira struggled to accept that her daughter Hannah had been 'replaced' by Matty, and even continued to call Matty 'her'.
But the pair have started to make headway of late. Will the mystery secret ruin what they have?
Meanwhile, Matty has become close to old school friend Victoria.
The pair shared a sweet kiss just last week.
What do you think Matty discovers? Leave us a comment on our Facebook page @EntertainmentDailyFix and let us know what you think!