Later, in 1963 Becker-Ho became involved in the Situationist International. She began what would be a long lasting relationship with Guy Debord, they married August 5, 1972. Together they published "Le Jeu de la Guerre" [The Game of War] in 1987, an expanded edition of which was republished by éditions Gallimard, Paris, in 2006. She was his partner until his death in 1994.
Becker-Ho has published numerous works of poetry in French: D'azur au triangle vidé de sable (Cognac: Le Temps qu'il fait, 2000); Paroles de Gitans (Paris: Albin Michel, 2000); Au Pays du sommeil paradoxal (Cognac: Le Temps qu'il fait, 2000). She has written a rigorous account of the various slang speech in Western Europe in her works Les Princes du Jargon (Paris: Gallimard, 1993), translated as "The Princes of Jargon" by John McHale (Lampeter & New York: Edwin Mellen Press, 2004), L’Essence du Jargon, and Du Jargon, héritier en bastardie (Paris: Gallimard) She also authored Au Pays du Sommeil Paradoxal [In Slumberpuzzleland].
After Debord's death Becker-Ho has taken up assembling and publishing his letters.