A working mother strives to balance her demanding career with the stress of raising two young children and maintaining a healthy marriage in this comedy adapted from the best-selling novel by Allison Pearson. By day, Kate Reddy (Sarah Jessica Parker) works for a Boston-based financial management firm; by night she's a devoted mother to two adoring children, and the happily -married wife of out-of-work architect Richard (Greg Kinnear). Though balancing those two worlds has its fair share of challenges, Kate generally manages to come out on top thanks to the support of her best friend Allison (Christina Hendricks), who's had plenty of experience balancing kids and a career. Meanwhile, on the other end of the spectrum, Kate's sharp-as-a-tack junior associate assistant Momo (Olivia Munn) possesses a fear of children and a strong work ethic. Just when Kate lands a lucrative new account that will see her traveling across the country on a regular basis, however, her new business associate Jack (Pierce Brosnan) reveals his flirtatious side, and Richard receives a job offer he can't turn down. Just when it looked as if Kate and Richard couldn't possibly take on any more responsibility, the demands of modern living ensure they'll never have a dull moment, even if they try.