EMMERDALE fans think they have uncovered a bombshell theory as to exactly just who Caleb Milligan's secret wife is.
ITV viewers minds have have been racing ever since the true identity of Caleb was uncovered on the show last week.
Caleb (Will Ash) is the secret son of Frank Tate, the deceased husband of Home Farm's head honcho Kim (Claire King).
Not only that, Caleb is also father to nanny Nicky – who has been faking his romance with Gabby and his nanny status all along in order to be close to the action at Home Farm.
This is all part of a bombshell plan between the father and son to take back ownership of Home Farm, believing the estate to be their's as a result of their connection to Frank.
Despite the many shocking revelations to have been uncovered in the Dales, one question has been left unanswered – who is Caleb's mystery ex-wife and Nicky's mother.
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Some superfans now think they have worked out just who it could be – and the answer will surprise you.
Penning a possible theory on the matter on Digital Spy's online forums, one fan questioned if it could be Kim Tate's sister.
They wrote: "Has Kim got a younger sister who could be Caleb’s wife? We don’t know much about Kim’s pre-Tate life.
"Maybe she has a younger sister who hates Kim for abandoning the family when she got married to Frank and they are both out for revenge lol. It is Emmerdale after all."
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Low and behold, one fan managed to uncover that she does indeed have a secret sister who has yet to appear on the soap.
They wrote: "I've just looked on fandom and it says she has a younger sister. Great shout."
Imagining the fallout such a shock could have on Kim and her empire, one fan said: "That would be interesting."
Last night, fans saw Caleb ask Leyla to keep their romance under wraps to stop it from getting back to his former partner and his son.
He told her they were separated but seemed to imply they were still legally married.
Could Kim really be about to be dealt two huge blows at once?
Or is Caleb's mystery wife somebody else entirely?
Emmerdale airs weeknights at 7:30pm on ITV1.
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