The former X Factor judge, who gave birth to her son Ethan in July 2010, revealed that she is hoping for a "bigger brood" after recovering from a thyroid problem and appendicitis.
"There's the possibility of a bigger brood," she admitted to Now. "The main thing has been getting my health back on track.
"But I do look at other little babies and think, 'Aww, it'd be nice to experience that again'. So yeah."
Minogue insisted that she wouldn't have to talk Smith round to the idea, as he is fearless when it comes to fatherhood.
"Kris knows it all and doesn't have fears about anything," she said. "As a parent, sometimes it's so confusing. I go to a toy shop and don't know what he'd like or what he needs."
In July, Minogue was forced to deny rumours that she had fallen pregnant after telling fans that she had an "exciting announcement" to make.
She was this weekend tipped to join the Britain's Got Talent judging panel.