The actress first announced the shock pairing in a TV interview last week, promising that Kylie and David will be "a really good combination" on screen.
Speaking on today's This Morning about the twist, Lane explained: "I am really, really chuffed about this storyline. When it came about, I couldn't believe it. What the writers can come up with now, the material - it could be explosive."
She continued: "I'm yet to read the scripts, but I do have sources who have told me that [Kylie is] very much the driver in the relationship, which is good."
Meanwhile, asked how David's mum Gail will react to the relationship, Lane replied: "I have no idea - but I can't wait to see her face!"
Earlier this month, it was confirmed that Lane is in the running for the 'Best Newcomer' prize at this year's National Television Awards.