Sexe et cancer de stade 4 : Accueillir le désir tout en luttant pour survivre  

(Alternative option, slightly more fluid in French)  
Sexualité et cancer au stade 4 : Concilier désir et combat pour la vie  

Note: Both versions maintain the original meaning while adapting to French phrasing conventions. The first is a more literal translation, while the second uses "sexualité" (sexuality) for better flow and "concilier" (reconcile) to emphasize the balance between desire and survival. The medical term "stade 4" is used in French oncology contexts.
Kaia Gerber et Cindy Crawford ont apporté une touche moderne à la petite robe noire avec leur moment mode mère-fille.  

(Note: The translation keeps the elegant and stylish tone of the original text while adapting it naturally to French. "Fresh spin" is rendered as "une touche moderne" to convey the idea of a contemporary update, and "mother-daughter fashion moment" becomes "moment mode mère-fille" for conciseness and fluidity.)