Kylie Minogue has told of the hurt caused to her sister Dannii after Simon Cowell's biography revealed she had a fling with the TV and music mogul. The brief, past relationship came to light just after Dannii, 40, announced in April that she was separating from partner Kris Smith, the father of her young son Ethan. Kylie, 44, told Glamour magazine 'my sister is going through a really difficult time' adding of the revelation: "It was a bit of a second blow after 'Oh, my relationship has broken down.'" Asked whether she thought that X Factor boss Simon had betrayed her sister, a former judge on The X Factor, by talking to biographer Tom Bower, she said: "Well, he doesn't need to do any of those things. Or maybe he does... Who knows? I don't know the guy." Kylie said that her younger sister, who is in Australia, was 'being pragmatic' since the split with her partner of four years. "She and Kris have been amicable, and after heartbreak and disappointment, then it's just organisation, concentrating on Ethan," she said. "We just have normal sister chats when we can - and that's all you need to know, that your sister's there. If she called me and said, 'I'm really flipping out, I need to see you,' I'd be on a plane tonight. "But Dannii is tough... Dannii will be all right. Of course, she'll be all right," she told the magazine. Kylie, who is in a relationship with Spanish model Andres Velencoso, also told July's edition of Glamour that she was happy with her own love life, but that she had no plans to marry. "He's very consistent. Aside from easy on the eye," she said. The pop star described herself as 'a serial monogamist' and added of marriage: "It could happen. But as Catherine Tate's character says, 'I ain't bovvered'. I think the idea of being trapped in any way, shape or form makes me feel nuts." Kylie celebrated her 25th year in pop music - and her birthday - with an Outstanding Contribution gong at the Glamour Women Of The Year Awards.
