Last month the Smile hitmaker insisted she was offered a cameo opposite her sibling, who plays Theon Greyjoy in the TV show, but snubbed the part after discovering the pair would have to be intimate on camera.She said: "They asked me if I'd be interested in playing Theon's sister, and I felt uncomfortable because I would have had to go on a horse and he would have touched me up and s**t. Once they told me what was entailed, I said no thanks."Now her brother has shot down the singer's boasts, insisting actress Gemma Whelan was always in line for the part.He tells Vulture magazine: "I heard about this, yeah. The only thing I'm going to say on that is that it's not true. And also that Gemma Whelan was always their first choice for the part. And she's fantastic. And that's the only thing I'm going to say about that."