I haven't read the novel, so can't comment on the portrayal of the couple's 10 year old son, " an accomplished origami practitioner..."
From The New York Times Sunday Book Review July 9, 2017 A Debut Novel Asks, What if His First Wife Was the One? In “Standard Deviation” by Katherine Heiny, a stuffy banker reconsiders his bubbly second wife. https://www.nytimes.com/2017/07/07/books/review/standard-deviation-katherine-heiny.html?mwrsm=Email Sent from my iPhone