Instyle February 2010 cover Heidi Klum

Heidi Klum graces the cover of the February issue of InStyle. Photographed for InStyle by Jenny Gage and Tom Betterton

Heidi Klum might be a 36-year-old mother of four, but her new cover and feature for InStyle's February issue proves she's still one hot mama.

The model/TV host/designer (check out her two new maternity fashion lines) discusses her passion for family in the issue, along with the struggles of being a 35-plus-year-old model in an industry that prizes youth above all.

"Models have a sell-by date," she tells the magazine. "There are certain jobs I don't do anymore, like the young, sexy, cute things for teenagers, or even 25-year-old girls. I go in a different bracket now."

Some projects in that new bracket include the aforementioned maternity lines, along with being the new face of Ann Taylor.

And although Klum's not walking the Victoria's Secret runway in a skimpy bikini like the rest of the girls, she proved at the lingerie company's latest show that she can still strut her stuff -- albeit in a gown. Though, stay tuned for this year's show.

Instyle February 2010 issue Heidi Klum

Heidi Klum featured in the February 2010 issue of InStyle. Photo: Photographed for InStyle by Jenny Gage and Tom Betterton

In the behind-the-scenes video of the InStyle shoot, Klum is shown frolicking in an oceanside mansion looking positively smoldering with voluminous locks, dripping in jewels and lots of strapless getups that hint at no sign whatsoever of having four babies -- one just three months ago!

To see more of Klum's photo shoot, pick up InStyle's new issue on newsstands Jan. 15.

And leave a comment letting us know what you think about the magazine's newest cover girl.

For a more controversial magazine cover, read about this nude drama.