“I think, for me, it’s about professionalism,” she said. “I’m not judging Oti, because I know my sister is a brilliant dancer, like all the other dancers on the show. It’s not about them. It’s about the celebrity learning to dance.
“There is a word in German, called gerechterweise, which means fairness. I need to be fair, it’s just the part of my personality. So if I feel like I’m [showing favouritism] to Oti, it’s not fair for Oti, it’s not fair for me, and it’s not fair for the other celebrities.”
She added: “If Oti should win or something, it’s important that she has a feeling that she did it on her own and not because her big sister gave her a five point lead. She would feel proud of herself. And that’s very important for me.
“I’m aware that people are always going to have something to say about it. But we are quite clear, and the matter has been spoken about.”