In an interview with Walford Web, the soap's boss revealed what viewers can expect from the forthcoming two-hander episode focusing on the pair following Stacey's murder confession.
Stacey, played by 21-year-old Lacey Turner, is currently racked with guilt after husband Bradley (Charlie Clements) fell to his death from the roof of the Queen Vic while being chased by police who believed he killed Archie Mitchell. The market stall holder has confessed to Bradley's father Max that she was in fact the true culprit.
Discussing how the story will now progress, Santer commented: "I think it's very interesting for Stacey. Certainly what we have planned for the next few months will be fascinating."
Of Stacey and Max's two-hander episode, he continued: "It will explore the motives behind what Stacey did, and be a big test for Max. Can he forgive Stacey for what she's done, even though it led to the death of his son? Will he turn her over to the police?
"One thing that we'll be keen to show is that Stacey was lucid at the time of Archie's death - striking him with the Queen Vic bust was not a function of her bipolar. She had sound reasons to be angry with Archie - he took advantage of her, he ruined her second chance with Bradley, he caused the chain of events which killed her best friend, he even effectively ran her beloved brother Sean out of town.
"All of this will be explored, as will the question of whether she really meant to kill him. For now, it stays a secret between two people, but who knows whether Max can keep it a secret forever?"
Stacey's live confession was seen by 16.6m viewers last Friday.