“It’s really good to see them actually being a little bit playful,” she said.
“It was really funny that when they came up with the words, it was all in their head.”
In the first half of the season, the foursome will read out a list of their favourite books, from Jane Austen to Alice in Wonderland.
“We’re going to read out our favourite books,” she added.
“And then we’ll go and read the list and then they’ll go, ‘Well, if you could pick any one of these you’d probably like to read it.'”
Ms Sibeko has also picked up a new favourite book of hers, The Book of Life by Stephen Hawking.
“I really like the book, and I just wanted to give it a go,” she joked.
“It’s not just about the books, it’s about life and how you’re going through it, and what you can do to help your life improve.”
The first chapter of the book has been written by Mr Hawking himself.
“We really wanted to start out with a bit of a surprise for everyone and then I think the fun is that I think people are going to love it,” he said.