This is a novel by the famous japanese author Junichiro Tanizaki.
Summary:
We need plausible deniability for all our actions—a job that does all the bruntwork for the ego and serves the shadow: who we allow ourselves to be seen with (and their motives), and what of our own psychoology we allow ourselves to be identified with. A friend once explained to me, "I'd look, but I can't be bothered enough to ask you to open their Instagrams to show me." this is a story about deceit and self-deception. essentially, it is a case study i also think can't have theory of mind without learning how to deceive can't be deceitful without deluding yourself i especially enjoyed the storytelling device of alternating journal entries, one being told by the husband and one by the wife. at the end, there's a post-mortem about