When it comes to their household, Heidi Klum and hubby Seal don’t allow any potty words to be uttered.

“When we’re around the children, we really make a point in our family to not curse or say potty words,” Heidi, 37, tells People.

“My husband and I try our best to make sure our kids are proper and have good manners. They’re already saying things that they shouldn’t be saying at their age.”

Heidi and Seal have four young children: Leni, 6½, Henry, 5, Johan, 4, and Lou, 15 months.  And she admits that she is especially watchful when it comes to her eldest daughter.

“Leni will sometimes come home and say, ‘What the…,’” the Victoria’s Secret model explains. “And I say, ‘Leni, What the…isn’t a sentence. It’s inappropriate and you can’t say it.’”

But, Heidi also admits she’s not perfect herself (love when celebs do that!).

“I’m not saying I’m a saint by any means,” she says. “When I’m with grown-ups and we’re out, I curse sometimes and we say some inappropriate things. But when we’re at home, my husband and I try our best to make sure our children are proper and have good manners.”