Despite months of abuse at the hands of Kirsty, mechanic Tyrone (played by Alan Halsall) is planning to marry her so he can gain custody of their baby daughter Ruby.
But the night before the big day, controlling Kirsty discovers her fiance has been having an affair with Fiz Stape (Jennie McAlpine).
Gumede said: "I think something's died inside for Kirsty. Tyrone was the love of her life and I think that's the one piece of happiness she thought she had. And just when she thought everything was going to go right, it all goes wrong.
"She's in love with Tyrone and hates him for what he's done, so if she can't have him, nobody can."