"Misia Godebska (1872-1950), the daughter of the Polish emigrant sculptor Cyprien Godebski, initially performed as a pianist. After marrying Thadée Natanson, the editor of La Revue blanche, she hosted a literary-artistic salon – Mallarmé, Debussy, Renoir, as well as young Nabi painters such as Vuillard, Félix Vallotton and Bonnard were among her guests. After Natanson was almost bankrupt, the newspaper magnate Alfred Edwards saved him, on condition that he surrender his wife. Misia's third marriage was with the Spanish painter José Maria Sert (1876-1945). See: Pierre Bonnard. Misia. Pierre Bonnard. Misia. Félix Vallotton. Misia at Her Dressing Table/Misia à sa coiffeuse."

This was taken from http://www.abcgallery.com/B/bonnard/bonnardbio.html (The site's title is "Olga's Gallery" and the info was taken from the "Notes" section)