Viewers are aware Tom (played by Ned Porteous) is behind the golf course development which could leave her family homeless.
He is also responsible for Sam Dingle (James Hooton) and Lydia Hart (Karen Blick) being arrested on Monday night’s episode.
In a tantalising preview clip posted on Emmerdale’s Facebook page, Debbie (Charley Webb) can be seen raging at Tom after discovering he has been deceitful.
When Debbie finds out about his plans she confronts him: “Now I know you’re a massive liar. You have watched my family in bits over this, you’ve pretended to feel sorry for them.”
“I am sorry but you don’t know the full sorry,” Tom replied.
“Well I’m going to tell you how it ends. You’re going to walk out that door and I’m going to pretend that I never met you,” Debbie said.
Elsewhere, Emmerdale’s producer Iain MacLeod hinted that there will be some huge twists ahead for Debbie.
He said: “This week is a big, big chapter for Tom and Debbie. We’ve seen how in love with him she is. So this week, it’s going to be full of surprises, full of twists, full of turns.
“We’re going to find out whether Tom has been entirely straight with Debbie about everything.”
In recent weeks, Debbie has fallen for Tom and has even worked with her lover.
Emmerdale continues tonight at 7pm on ITV.