Supermodel-turned-reality TV star Joanna Krupa is threatening to sue the editors of a gossip website over allegations suggesting she's a high-class call girl.

The former Dancing With the Stars contestant, who is a new member of Real Housewives of Miami team, was appalled to read an article on TheDirty.com which linked her to a prostitute ring and she instructed her lawyers to fire off a strongly-worded letter to website boss Nik Richie.

Attorney Marty Singer insists his client is not "a confirmed hooker," as the website recently suggested.

According to TMZ.com, Krupa has threatened to file a lawsuit if the article isn't pulled.