Standard Deviation by Katherine Heiny

Graham’s second wife, Audra, is an unrestrained force of good nature.

She talks non-stop through her epidural, labour and delivery, invites the doorman to move in and the eccentric members of their son’s Origami Club to Thanksgiving. When she decides to make friends with Elsbeth – Graham’s first wife and Audra’s polar opposite – Graham starts to wonder: how can anyone love two such different women? And did he make the right choice?