Answer:
Thérèse Raquin, novel by Émile Zola, first published serially as Un Mariage d'amour in 1867 and published in book form with the present title in the same year
The Next Thing You Know" involves end-of-life doulas/"death" doulas. I did not realize that was an occupation, but it seems that (in real life) they provide a valuable service and fill a significant need in the area of end-of-life care/planning. The story focuses on doula Nova Huston and client Mason Shaylor.
Step-by-step explanation:
Thérèse Raquin tells the story of a young woman, unhappily married to her first cousin by an overbearing aunt, who may seem to be well-intentioned but in many ways is deeply selfish.