Jamie Tate could be left utterly devastated after discovering that Millie might not be his daughter after all.
Next week on Emmerdale, Graham and Andrea's murky past will be revealed to viewers as he demands to know whether he is Millie's father.
It all comes about when Kim Tate (Claire King) warns son Jamie against riding horse Blaze, but he dismisses her concerns and ends up losing control.
Everything turns to chaos as the other horses are left spooked and Millie is rushed to hospital after being knocked down.
As they are waiting for the doctor, Kim comforts her son (Alexander Lincoln) and insists that it isn't his fault.
However, unbeknownst to the pair, Andrea's revelation about Millie's date of birth sends Graham's head spinning and he demands to know whether he is her father.
Andrea (Anna Nightingale) is utterly horrified and the next day, as Jamie and Kim fuss over Millie, desperately tries to hide her dread over Graham's question.
But Graham, played by Andrew Scarborough, won't give up and leaves her angry messages telling her not to ignore him.
Later, he confronts her at the hospital but Andrea panics and doesn't want to face the truth.
Andrea begs him to keep their one night stand a secret and insists that he isn't Millie's father.
Yet Graham isn't convinced and is sure that her anxiousness is proving otherwise.
Is Graham right? And will this rip Andrea and Jamie apart?
*Emmerdale airs weekdays at 7pm on ITV, with an additional episode at 8pm on Thursdays
