How does the author use foreshadowing in The Immoralist?

In Part I, Chapter IX, there are indications that Michel and Marceline's happiness will be short lived in the foreshadowing of Michel looking at the sleeping Marceline, as he wonders if he would ever be able to care for her like she did for him if she were ever to fall ill. Michel knows his capabilities and limits especially now in his self-absorbed state of mind. The conventional mores, which used to drive Michel's life, have been overrun by the narcissistic Michel who will grow even more distant from his marriage very soon.