Rosemarie is Finch’s dad’s mousy, deferential second wife and Josh Raymond’s mom. Finch knows that his dad cheated on Finch’s mom with Rosemarie before his parents divorced, but it’s somewhat murky when Rosemarie and Finch’s dad’s relationship actually began. Eventually, Finch concludes that Rosemarie’s son, Josh Raymond, is actually Finch’s dad’s biological son, meaning that their relationship began at least nine years before the novel begins. Possibly because Finch cares so little about her, he makes few observations about Rosemarie’s personality over the course of the novel. She mostly embodies what Finch realizes is his dad’s vision of the “perfect wife.”