In 1894, Marval met the painter and began living with him in Paris, where she was introduced to
Les Nabis group. Girot introduced her to
Jules Flandrin, another painter and a student of
Gustave Moreau. The two fell in love, and Marval left Girot to move in with Flandrin in Rue Campagne-Première, in the
Montparnasse area. She would live with him as his companion for 20 years. As an artist, Marval worked primarily as a painter; however, she also made "lithographs, watercolours, pastels, engravings, tapestry designs and experimented with sculpture." In 1902, several of her paintings were displayed alongside works by Flandrin, Albert Marquet, and Henri Matisse in a gallery in Rue Victor-Massé curated by
Berthe Weill, who was particularly interested in promoting the works of female artists living in Paris. The series was based on the
Ballets Russes' production of
Daphnis et Chloë , performed the year prior. Also in 1913, Marval protested against the removal from the
Salon d'Automne of
Kees van Dongen's
The Spanish Shawl, and became friends with Van Dongen, setting up her studio near his. Marval and Flandrin moved into 40 rue Denfert Rochereau, which was next door to Van Dongen in 1914. == Critical reception and legacy ==