When Anna-Kat draws a super plus-sized portrait of Katie for the school art show, Katie sets out to retrieve it. Meanwhile, with Katie away, Doris is left in charge of Oliver and Taylor, and is determined to whip them into shape with her Tiger Mom skills.
Katie and Greg throw themselves into PTA politics when they learn that Anna-Kat's special needs teacher, Dr. Ellie, has been cut from the school budget. Greg gets elected to the PTA, but Katie may not be able to keep her mouth in check long enough to win the votes they need.
Katie's holiday spirit is soured when Viv corners her into helping out with the school Christmas pageant. Greg, determined to teach Taylor and Oliver the true meaning of Christmas, takes them to a local nursing home to cheer up the residents.