A Manhattan woman whose picture was used as a sexual aid in the hit movie "Couples Retreat" has filed a $10 million lawsuit over her inspiring -- and unwitting -- appearance in the Vince Vaughn flick. Irina Krupnik "only learned of defendants' lascivious use of her photo in the film" after it was released in theaters -- and was horrified to discover it was being used as a "masturbatory prop" for a character played by Jon Favreau, the makeup artist says in papers filed in Manhattan Supreme Court. "That photo was taken nearly 10 years ago for a modeling job...