She was supposed to be 19 when she bared all for this role, but I have my doubts. These are some screencaps from the 1971 "film that goes where no other has dared" known as Don't Deliver Us From Evil to English speaking audiences or Mais ne nous délivrez pas du mal in the original French. Interestingly enough, it is one of the few French movies to ever be banned in France. Quite an accomplishment! It wasn't banned for the multiple depictions of underage girls getting raped by greasy old men, but rather because it was negative toward the Catholic Church.
If you've seen Peter Jackson's Heavenly Creatures then you already know the basic plot because both films were based on the Parker-Hulme murder case and the twisted friendship that existed between Pauline Parker and Juliet Hulme. Of course, certain liberties were taken and sensationalized for the benefit of the audience. Don't Deliver Us From Evil is an exploitation movie, after all.