The Hole in the Middle by Kate Hilton. The book is being released by NAL on January 5, 2016.
Amazon says this about the book: The heartfelt and hilarious, international bestselling debut about having it all without losing your mind.
Sophie Whelan is the kind of woman who prides herself on doing it all. In a single day, she can host a vegan-friendly and lactose-free dinner for ten, thwart a PTA president intent on forcing her to volunteer, and outwit her hostile ‘assistant’ in order to get her work done on time.
With her fortieth birthday looming, and her carefully coordinated existence beginning to come apart at the seams, Sophie begins feeling like she needs more from her life—and especially from her husband, Jesse.
The last thing Sophie needs is a new complication in her life. But when an opportunity from her past suddenly reappears, Sophie is forced to confront the choices she’s made and decide if her chaotic life is really a dream come true—or the biggest mistake she’s ever made…