Gisele Daughter: Model Walks Vivian Lake In Costa Rica; Shows Off Post-Baby Body In String Bikini [PHOTO]

Some women just do not belong to this world.

Brazilian supermodel Gisele Bundchen enjoyed a day out in the sun with husband Tom Brady, 3-year-old son Bejamin and baby girl Vivian Lake. Donning a flowery string bikini, the Victoria's Angel showed off her enviable post-baby body -- which, truth to be told, looks a lot like her pre-baby body.

Check out her stunning frame in these photos.

The secret to her quick recovery is a strict prenatal fitness program Bundchen swears by: kung fu and yoga, three times a week.

"I think a lot of people get pregnant and decide they can turn into a garbage disposal," she said. "I did kung fu up until two weeks before Benjamin was born, and yoga three days a week."

The super model takes yoga from Amy Lombardo when she is in L.A., and kung fue and tai chi with Boston's Yao Li.

"She normally does an hour of yoga in the morning," Lombardo said. "It's a great way to wake up your body."

Bundchen has also reported to be a follower of the Dukan Diet, which focuses on lean protein, water and oat bran before introducing vegetables into your meals. Kate Middleton supposedly followed it to slim down before her royal wedding, too.

She is hoping to get her kids to a healthy diet too: She does not allow them to have sugar.

"When Benjamin eats broccoli, he thinks it's dessert!"

Bundchen has said she does not plan to stop at two kids, she is one of six sisters and wants a big family of her own.

"I don't know when. Right now I have my hands full," she said, adding that she feels very lucky.