Chas Dingle will continue her romance with Cameron Murray (Dominic Power) in secret from his pregnant partner Debbie (Charley Webb) over the next few months.
The 35-year-old actress told This Morning: "Things haven't worked out so it's been sad.
"There's a slight complication with Debbie as he's [Chas]'s niece, so there is a bit of a thorn in the side.
"But it's carrying on and we've got a massive 40th this year - so I'm sure the build-up to that is going to be less than happy and a bit complicated."
Emmerdale will mark its 40th anniversary in October.
> Emmerdale Lucy Pargeter: 'Chas Dingle will be an outsider'
> Emmerdale boss teases "spectacular" anniversary plans Get the Inside Soap magazine on your iPhone or iPad