"her name was Marthe de Méligny"

Bonnard met Marthe in 1893 when she was 24.  They married and remained together until her death.  She became not only his wife but his model.  She had a fondness for the bath and some of Bonnard's best works are the BaignoiresNude in Front of the Mantlepiece is one example. 

There is a parallel to Max's wife who, 'when she fell ill, took to extended baths in the afteroon' (p 153).

Pierre and Marthe