The Australian former model, who has 2-year-old Indigo and 1-year-old Jackson with her businessman husband James Packer, said that she always knew that she would be a mother one day.
Packer told New Idea magazine: "I always knew I wanted to have kids. My sister's got four kids and they're absolutely divine.
"I'm pretty militant about routine. Sleep, eat, play: there's a strict routine. [James] is amazing, Indi has him wrapped around her finger."
The Packer family are reportedly close to completing their new $45 million (£28 million) Sydney mansion, which features a pool, elevator, underground bunker, 13-car garage, sauna and private dance hall.