The New Adventures of Old Christine

Christine's 8-year-old son, Ritchie has been accepted into a posh private school where Christine encounters two snooty class moms, Marly and Lindsay, who can't seem to grasp the concept that Christine actually works. Her 20-something slacker brother, Matthew, lives with her, but in a pinch, also serves as Ritchie's babysitter. On the first day at Ritchie's new school, Christine is mortified to discover that her ex-husband, Richard, with whom she gets along even better than when they were married, is dating a young, nice, impossible-to-hate woman also named Christine… the "new" Christine.

Since "New" Christine broke up with Richard, he's been spending a lot of time at her house, leading Ritchie to believe that his parents are back together. When Christine tells Richard that Ritchie told this to his new teacher, Mr. Harris, Richard suggests that they give their relationship another try.

Christine and Mr. Harris try to establish a relationship before having sex, but Barb gives her pause. Matthew is horrified when he sees his med school cadaver was a neighbor.

Christine offers to marry Barb to help her stave off deportation. Meanwhile, Richard looks to pop the question to New Christine.

Christine and Matthew fly to the Bahamas to get Barb an illegal visa after she was arrested by immigration during Richard and New Christine's wedding ceremony.