Steve (Simon Gregson) ends his relationship with Michelle next week, but only as part of an elaborate plan as he thinks he can play his twisted ex Tracy Barlow (Kate Ford) at her own game.
The Weatherfield cabbie believes that Tracy will dump Michelle's son Ryan (Sol Heras) if she no longer sees Michelle as a threat, putting an end to her latest manipulation.
However, Steve risks his entire future with Michelle by refusing to confide in her about what he is up to.
Lomas told Soaplife: "She's devastated. There's been a lot of stress on their relationship recently. They've had the ongoing problems with Tracy, Ryan's been difficult to deal with, and Michelle's just been really stressed out. She's at a very low emotional ebb and Steve dumping her is the last straw.
"He tells Michelle it's because all they do is argue and fight. Michelle's stunned. Let's face it, Tracy's only dating Ryan to annoy Michelle because she's now with Steve and Tracy wants him back. Michelle thinks Steve's now giving Tracy what she wants - that Tracy has won."
When Steve finally reveals to Michelle that the shock dumping was fake, it's uncertain whether she will accept him back.
Lomas added: "She's really angry and annoyed when Steve reveals the thinking behind his plan. She thinks he's an idiot for not telling her what he was doing.
"He begs her to forgive him, but at first she really doesn't want anything to do with him. Michelle's not the most forgiving person, so he has a lot of work to do to make amends. It's grovelling time for Steve - yet again."
Coronation Street continues tonight (October 10) at 7.30pm on ITV1.