Please Help: Question about classical vocal piece in "Henry & June"

On the soundtrack CD of "Henry & June" there is a piece of music that is not included but is in the film. It's a vocal piece (a song or opera aria) heard during the love scene between Henry Miller and Anais Nin right after he's finished his novel. The music sounds like Debussy or Ravel, but I can't place it and it's not even listed in the end credits. I'd be grateful for any help. Thanks!

, March 25, 2005; 7:17 PM