EastEnders producer Dominic Treadwell-Collins has revealed that there will be further changes ahead for the Carter family once Sylvie Carter arrives.
It was previously announced that Stan's ex-wife Sylvie Carter would be introduced into the show and bosses are currently in the process of casting her.
Sylvie, who is the mother of Shirley and Tina, walked out on her family years ago, but viewers know that Aunt Babe is still secretly in contact with her.
Speaking to Inside Soap, Treadwell-Collins admitted that she will be arriving 'imminently', adding that she will change the family dynamics once again.
He said: "We are on the brink of casting Sylvie now and she will change the Carter family dynamic yet again. She brings with her some meaty stuff for Shirley and Mick, but mostly Stan. Timothy West is a brilliant actor, and he's not in vain.
"In fact, he has come up to me to complain that Stan is too nice and he wants to make him more unpleasant.
He continued: "When we announced the characters, we deliberately said Aunt Babe was lovely and Stan was dark and then we twisted it around and turned it on its head. We have now seen a darker side to Aunt Babe and there is more to come."
Treadwell-Collins also teased another bombshell for the family when Mick discovers that Shirley is actually his mother and not his older sister.
"All I can say is, it'll all come out at the worst possible time. It is going to get messy for the Carters, especially after Dean rapes Linda," he added.
"It's a difficult story to cover but it's a very important issue to tackle and this story has the potential to make a real difference to people's lives."