Chas will soon take her plotting to a new level by proposing to Carl (Tom Lister) in a packed Woolpack before later lying that she is pregnant with his child.
The latest developments form part of Chas's long-term plan to humiliate Carl after discovering that he has been cheating on her with flirtatious Eve Jenson (Suzanne Shaw).
Speaking of Chas's pregnancy lie, Pargeter told All About Soap: "Everything spirals out of control and it just sort of slips out. Chas is determined to get Carl down the aisle as quickly as possible, so she suggests they have a Christmas wedding.
"But goodness knows how long she'll be able to keep up the façade of a fake pregnancy too - she's certainly got her work cut out for her."
Pargeter recently admitted that being part of a major Christmas storyline is a "massive responsibility".