Faibles femmes (1959)
Directed by Michel Boisrond

Film Synopsis

Agathe is happily anticipating her wedding day when a former lover of hers, Julien, suddenly shows up from out of the blue.  Julien is one of those dishy Don Juan smoothies that no woman can resist, and sure enough Agathe's former feelings for him are soon reawakened.  Julien's libidinous appetites are apparently limitless and no sooner as he made one easy conquest he is off pursuing his next.

The heartless seducer's next victim is Agathe's closest friend Sabine, and after this another friend, Hélène, is lured by his irresistible charms.  As Julien goes on accumulating feminine conquests at an alarming rate, Agathe and her friends decide that enough is enough.  They agree it is time they brought an end to his skirt-chasing days once and for all.  The time has come for Julien to die, but how are they to do the deed?  The answer is easy.  He has poisoned all of their lives so what better way to repay him than by poisoning him...