Update: Rep Explains: Why Gisele Was Kissing Another Man

Last Thursday, Gisele Bundchen was photographed kissing a man -- not her husband, Tom Brady -- at the Vogue 90th Anniversary party in Paris.

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Bundchen's mystery party companion: NYC art dealer Helly Nahmad.

A rep for ther supermodel, 30, tells UsMagazine.com: "This is her friend of 15 years, Helly. Her first New York friend when she moved here."

Nahmad -- who once dated another Brazilian model, Ana Beatriz Barros -- is fluent in Portugese and was "the only one [Gisele] could speak to [when] she spoke no English," the rep continues.

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"He is very much part of her close circle of friends. No worries there!"

Nahmad himself also explained their longtime friendship to Brazilian newspaper O Dia (via Huffington Post), noting that he introduced her to old flame Leonardo DiCaprio.  What about that kiss? "Gosh, it was a kiss on the cheek," he said, claiming that the camera caught them at a deceptive angle.

He added that New England Patriots star Brady even saw the talked-about photos of Nahmad and his wife -- and laughed.

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Married since February 2009, Bundchen and Brady welcomed son Benjamin last December.