"I want to get back into shape for me, not because people think I should. I want to be a yummy mummy, not a Molly mum," News of the World quoted her, as saying.
"When some women have kids they let themselves go - I call that a Molly mum. They don't bother dressing up and forget about themselves. It's important to look good because in some cases I think the man would lose interest and disappear," she added.
However, the British beauty insisted that she shared a very strong relationship with her singer husband Peter Andre, which is why she would not lose him.
"No, I don't think I would lose Pete. Our bond is so strong nobody could break it. But in general, men want a woman who looks good," she said.