German supermodel Heidi Klum says she will not extend her family after her fourth baby is born later this year, because — get this — four kids are “a lot of work”.

The 36-year-old is expecting a baby with singer husband Seal, but cautions that this is the last time they will extend their brood because they are now “outnumbered” by their children.

“We’re outnumbered. Four is perfect. Three is a lot. But four? It’s a lot of work. We’re hands-on, and we feel like this is what we can handle,” the Project Runway host told USA Today this week.

Klum says her glamorous life as a model was pushed aside when she became a mother because her three children – daughter Leni, five, and sons Henry, three, and Johan, two – have “taken over” the family home.

“They have taken over already. I’m not someone who is like, ‘Ok, this is a museum, and you can’t sit here and you can’t touch this and everything has to be put in its place.’ They live there as much as we do… You come into our house, and there is a giant elephant and lion to welcome you. We have those big stuffed animals, and we have toys and things everywhere,” she said.