Christine only makes things worse when she tries to make amends to a girl she bullied in junior high, while Matthew has a surprise in store for him when he tries to "friend" an ex-girlfriend on Facebook.
Christine sets Richard up on a date with a gorgeous, passionate woman who works out at her gym, while Richard's friend, Tom, continues trying to woo Christine.
While at her son's school signing up to help at the upcoming fair, Christine runs into ex-boyfriend Burton, whose son recently enrolled. Seeing him rekindles her interest and her hopes soar when he seems interested in her, too.
Christine and Matthew reluctantly attend a neighbor's Christmas party, while Richard and Ritchie participate in New Christine's unusual holiday tradition.
There is an outbreak of lice at Richie's school and he is one of the affected ones. Everyone thinks Christine and Richie are "patient zero". Tired of the hassles at that school, Christine looks for another school for Richie.
Christine encourages an African-American couple to enroll its child in Ritchie's school to increase diversity, only to find out after the fact that they're raging homophobes.
Christine freaks out when she finds out that she's dating New Christine's dad - which means that if they got married, she could become ex-husband Richard's stepmother-in-law.
