Remember 'femme' originates from French, where it specifically means a woman or wife. He married a French femme.
Pro Tip 2/3
Cultural Flavor
Using 'femme' may add an exotic or sophisticated flair to English descriptions, due to its French roots. Her style was très chic; unmistakably femme.
Pro Tip 3/3
Avoid Overuse
Overusing 'femme' can be confusing; reserve it for when the French context enhances the conversation. The protagonist in the novel was a strong, independent femme.