A Change of Place — Tracy Sinclair

When her troubled twin asked her to take her place for a month, Kimberly Jamison shied from her sister's scheme. Who would believe she was Domenique, flamboyant fashion plate of Paris's famed House of Duroche! Kimberly felt obligated to assume her desperate sibling's identity, but feared she wouldn't fool the high-fashion elite--or Duroche's eagle-eyed troubleshooter, Alain Marchand.

Disdainful of glamor girls, tenacious Alain immediately sensed a change in the "new" Domenique--she was more warmly alluring than ever! But with a traitorous model at Duroche, the American beauty was definitely suspect. Alain had to know the truth, had to know the real Domenique. . . even if it meant risking his own vulnerable heart.

Made into a TV-movie of the same name in 1994.