Carla confronts Frank (Andrew Lancel) at his home later this week after he wins his appeal for bail and recruits his mother Anne to act on his behalf at the factory.
As revealed earlier this year, Anne (Gwen Taylor) immediately starts to make life difficult for Carla, believing that her allegation of rape against Frank is false. She then hires burly thugs to take away Frank's share of the business - including machinery and materials.
King told ITV.com that Anne makes her intentions known during a late-night visit to the factory, explaining: "Carla goes into Underworld expecting to see Sally being all goody two shoes. She goes back quite late at night to get some papers. She's a little bit worried that Frank might be in there, but she's hoping that it's Sally. And instead, it's Frank's mother.
"She lets it be known to Carla that she's not going anywhere and she's actually there to be a proxy, which is somebody to come in and cope with Frank's businesses on his behalf. And there's no way that I can get her out."
She continued: "Frank sends in his mum to get some big, burly men to come into Underworld and take all [the] sewing machines away. Well, 40% of them.
"This is the last straw, and she can't think of anything else to do, bar go and see Frank, confront him and say, 'I want my stuff back'. Which, of course, is probably not a good idea under the circumstances and with how angry she is at him. It doesn't go very well."
Coronation Street continues tonight at 7.30pm and 8.30pm on ITV1.
> Coronation Street Frank will be protected by Anne, says Gwen Taylor
> Coronation Street Carla plot has high drama ahead, says Alison King
> Read more Coronation Street spoilers and news
Watch a video preview of tonight's Coronation Street double bill below: