Simon Cowell's girlfriend predicts they will split up when she wants a family.

Terri - who is fast becoming a household name in America after presenting reports on celebrity TV station E! - has accepted her relationship with Simon will not last, because he has already told her he never wants children.

She told Britain's Hello! magazine: "I've known Simon's thoughts on marriage and babies from the beginning. He doesn't want kids, full stop. But I would definitely love to have a baby.

"Not now, because I'm so busy. I love my job and wouldn't want to give up what I'm doing. But in the future, I definitely will.

"Because everything is so amazing, I haven't allowed myself to think about splitting up with Simon. Maybe I will, shortly. It's not something I'm worrying about right now. Definitely in the next couple of years though, I think it will happen."

Meanwhile, Terri reportedly stormed off the set of a US chat show when Simon was asked which three people he would save from a sinking ship and said himself, his mother and his fellow 'American Idol' judge Paula Abdul. An insider said: "Terri looked really crushed when he said that, and stormed out. Simon didn't realise he had said anything untoward."