AceShowbiz -

Irina Shayk is celebrating World Breastfeeding Week with a sultry Instagram photo. The 31-year-old new mom has just posted on the photo-sharing site the black-and-white photo that has her exposing her bare chest as she doesn't wear her dress properly.

In the photo shot by famed photographer Mario Sorrenti, the Russian model strikes a seductive pose on a couch with her eyes closed. She showcases her slender legs while strategically placing her hands on her chest to prevent her nipples from showing in the pic she simply captions with "#WBW."

#WBW 🖤 @mario_sorrenti

A post shared by irinashayk (@irinashayk) on Aug 2, 2017 at 8:04pm PDT

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It's unclear when and for what the sultry photo was taken. Irina, who welcomed her first child, daughter Lea de Seine, with boyfriend Bradley Cooper on March 21, has been showing of her amazing post-baby body on-and-off social media lately.

Late last month, the Sports Illustrated Swimsuit Issue model flaunted her toned body in a sheer lingerie in a bathroom selfie she shared on Instagram. She also posed completely naked during a photo shoot with Mario Testino for Vogue Spain.