EastEnders will air deadly scenes this Christmas, as Sharon Mitchell's affair with son-in-law Keanu Taylor is exposed.
Pregnant Sharon is carrying Keanu's child, with husband Phil now knowing the baby isn't his.
But he doesn't know about Keanu, and instead thinks Jack Branning is the dad.
His daughter Louise Mitchell, the fiancée and baby mama of Keanu, will also learn of the affair over the festive period.
All hell will break loose as Phil takes his revenge, with rumours Keanu will be murdered.
Now, Louise actress Tilly Keeper has revealed all about the moment Louise learns the truth.
She teased her reaction to the betrayal might even surprise fans, as she hinted at the scenes ahead.
It seems her suspicions are raised when her dad and brother Ben ask about Sharon's behaviour during his time away months ago- with Louise actually almost rumbling the fling last year.
Tilly said: "It definitely sparks a suspicion!
"Louise is so caught up in her own life and drama so when that reality is brought to her again, it definitely does spark something but she doesn't want to play on it too much because she wants to have the best Christmas with her baby girl.
"But there is an underlying tension of her remembering her own suspicions from the last year."
On the moment she finds out, she added: "She’s got that kind of scheming side to her and she knows how to manipulate people.
"She’s definitely trying to manipulate the truth out of both parties so she’s playing the field between Sharon and Keanu by separately quizzing them about last year.
"But with every answer they’re giving her, it’s feeding the fact that she’s really trying to deny the truth even to herself."
But Louise's reaction might not be as expected, with Tilly adding: "It’s a reaction I don’t think anyone will expect! Of course she’s a young girl and her fiancé has cheated on her so she’s obviously devastated."