Cindy (Stephanie Waring) has been helping Darren to plan his secret wedding to Nancy (Jessica Fox) in recent weeks, while still harbouring feelings for him.
As seen in pictures released at the weekend, Cindy will plant a kiss on Darren unexpectedly next week - leaving him stunned.
However, Dawson told TV Times: "Straight away, Darren pushes her away and says, 'No, I'm with Nancy now'.
"He's been through two weddings with Cindy where he's tried to stop her from going ahead with it so she could marry him instead. She didn't take the bait, and he's over all that."
The actor added that the upcoming return of Nancy's mother Margaret will cause Darren to have second thoughts over his plans for a Valentine's Day wedding - as he realises the date has special significance for Nancy.
"When Darren asks Margaret why she's come over, she says she wants to put flowers on Becca's grave on the anniversary of her death - February 14," he said. "He also finds out that Jake tried to rape Nancy on that date."
Hollyoaks airs weeknights at 6.30pm on Channel 4 with a first look screening at 7pm on E4.
> Hollyoaks star Ashley Taylor Dawson teases Darren wedding plot
> Hollyoaks star Jessica Fox excited over new Nancy plot
> Hollyoaks' Cindy wants Darren back, says Stephanie Waring
> Read more Hollyoaks spoilers and news