Her best-known work is her first novel Ces dames aux chapeaux verts (These ladies with green hats), a satire of provincial life published in 1921.

On October 23, 1911, at Saint-Omer, she married Albert Acremant (1882-1942) who was director of the literary journal, Excelsior, in Paris.

It was during World War I (1914-1918), when her brother Pierre Poulain (1887-1914) was killed, that the idea of writing, for entertainment,[3] came to Acremant while she was practicing Watercolor painting.

Her first attempt in literature earned her notoriety: the Société des gens de lettres awarded her Ces dames aux chapeaux verts (1922), which also received the Nelly Lieutier prize in 1921,[3] a hit comedy satire of provincial life, which she wrote with her husband, Albert Acremant.

It played a thousand performances at the Sarah Bernhardt theatre and was reprinted many times with more than 1.5 million copies sold.

This novel was followed by many others (about thirty), most of which were set in the North of France, from Saint-Omer to Étaples, from the hills of Artois to the beaches of Le Touquet, via Boulogne-sur-Mer.