When her husband's ex-wife shows up to her first ever class as a full-fledged teacher - and compliments her performance! - she can't help but wonder what the catch is. Throw in a mandate from the PTA president to raise money for the new tablets and her granddaughter's other grandmother (whom no one has ever met) visiting for Christmas, and Jen is going to need more than her regular spin class to get her through the year. But as ever, humor is her best stress relief. Her acerbic emails to the class parents and friendly spars with her daughter over how organic is organic-enough for baby food will have you laughing out loud and texting Jen's best lines to your friends.