A Small Hotel
By Robert Olen Butler. Through brilliant use of flashbacks and alternating perspectives, this intimate novel tells the story of Michael and Kelly Hays, a Southern professional couple who are divorcing after two decades of marriage, though it becomes apparent that they are both still painfully in love with each other. As soon as the reader starts to side with one character, a new twist reveals the other character's vulnerability and the dysfunctional family pattern that he or she is struggling to break. The novel winds toward a suspenseful climax as we wait to discover whether they will tell each other the truth before it's too late.
Source: https://www.amazon.com/Small-Hotel-Robert-Olen-Butler/dp/0802145833