Natalie Ann Jamieson says her Emmerdale factory fire storyline has been "really intense" - but has teased fans things will get "a whole lot worse" for her character.
Now the star has admitted there are many more "emotional and powerful scenes" to come when Frank's daughter Tracy Metcalfe (Amy Walsh) finds out who was responsible.
She said: "It's been a really intense storyline to film - it's Amy's first major storyline since she returned and it's really thrown me in at the deep end.
"It's been great to do some of these really emotional and powerful scenes with the likes of Laura and Amy and I am continuing to learn so much from them."
This week sees Tracy discover the truth about what really happened to her dad - who has so far taken the blame for the factory fire given he's not alive to defend himself.
Tracy has been determined to prove Frank's innocence, despite the weight of evidence stacked against him, but when she finally gets a confession out of Kerry, things take a dramatic turn.
As Tracy rushes out to tell the police, there's a struggle and when Tracy pushes Kerry, Kerry falls and hits her head.
She ends up fighting for her life and Natalie admits Amy's "in bits" about the possibility she could lose her mum.
The storyline has left many fans fuming that Amy and Kerry have got away with their crime.
Natalie understands why there has been a "fair bit" of viewer backlash against her and Laura's characters, but she cannot help but get "defensive" of Amy, because the pair are in a tricky situation.
She added to Metro.co.uk: "There has definitely been a mixed response from viewers and understandably, there has been a fair bit of backlash against Amy and Kerry for their actions.
"The storyline is about two people and how they live with the guilt of something terrible that has happened after they have lost control of the situation.
"I do get defensive of my character and I suppose I might be a bit biased because I play her but it does boil down to what you would do for the people you love."
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And Laura recently admitted she has found it "extremely hard" to play out the hard-hitting plot.
She said: "I've found this one of the hardest things to play since I've been here.
"It's really hard to play the guilt without being really on the nose. I've had chats with directors about when you're lying, if someone in real life tends to lie or fib they do it convincingly so people don't know.
"But at the same time you're trying to show an audience you're living with guilt, that you don't feel good, that you're not finding it easy lying.
"But in real life that's not what you would show, so I've found it extremely hard to play."
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