The pair have finally become an item in recent weeks, but are currently keeping the news a secret from the rest of the village.
Laurel split from husband Ashley earlier this year as his abusive behaviour towards dad Sandy was revealed.
Speaking of having fewer scenes with John Middleton - who plays Ashley - Bellamy told Inside Soap: "It's very weird - I don't see him much now after we'd worked so intensely together. It's as if your own relationship changes, but that's the world of soap.
"It's going to be awful to see Laurel tell Ashley that she's with Marlon - though it doesn't happen as you might expect it would."
As well as having Ashley to worry about, Laurel may be disappointed by the way stepdaughter Gabby reacts to the changes in her life.
Bellamy continued: "Laurel's set to move in with Marlon, and they'll have their own family unit. I don't know if they'll get married or have a baby, but it's a big change in Laurel's life and my journey in the show. However, I don't think it's going to be plain sailing with little Gabby."
Emmerdale airs weeknights on ITV1.