"We had no plans," she states.
"We never planned an instant restaurant. Like, everybody else had in mind what they were going to do and how they were going to do it. They'd had years to prep for it!
"I'm from Perth. She's from Melbourne. I wasn't even in my own state! It was really tough."
As Karolina previously told WHO, she and Milly were kept apart when the cameras weren't filming to ensure the fireworks were caught on screen.
However, according to the 46-year-old, when it came to their instant restaurant, there was a lot that wasn't caught on camera.
"The need to have like behind the scenes cameras here," she spills to New Idea.
"It would be incredible. It really would. Just do a sneak MKR behind the scenes.
"A little fight that Millie and I had behind the scenes where no one else saw it would have been, oh my God, like perfect."
For more from Karolina's explosive exclusive interview, listen to the newest episode of reality TV podcast Real Talk with Holly & Ali below.