When Richard's frequent presence at Christine's house confuses Ritchie into to thinking they've reconciled, Richard wonders if they should.
Following her learning that Richard's willingness to embrace life is responsible for his success with women, Christine goes against form and accepts a date from a handsome stranger.
Christine is stunned to find out the man she's seeing, New Christine's father, is also a grandfather.
Ritchie goes to church with Richard and new Christine without consulting his mother first, leaving old Christine to explain and explore her aversion to organized religion.
Barb moves in with Christine after deciding to divorce her husband. This forces Matthew into Ritchie's room, where he discovers his nephew has some odd habits.
When she's again faced with 'Sad Dad' Stan, Christine once again finds it impossible to resist him and finally reveals why to Richard. Meanwhile, Matthew is stuck with a date who just won't leave.
When Richie wins a playdate with Christine's latest crushhis teacher, Mr. Harrisa pre-planned trip with Richard forces Christine to confront her crush head-on.
Christine makes sacrifices so she can pay for Ritchie's school tuition and enters into an arrangement with Barb that will help. Matthew decides he needs to make more of himself.
After Ritchie begins showing more interest in spending time with Richard and then does a bad job on his school homework project, Christine contemplates bailing Ritchie out in an attempt to win him over again.
Christine has difficulty adjusting to Barb now being her business partner. With his schooling soon to interfere, Matthew helps find a new nanny for Ritchie.
Christine's Prius and Marly's SUV back into each other. While she's upset at Marly's continued superior attitude over the situation, she's more upset at there only being an SUV available at the rental agency.
Richard wants Ritchie to learn the value of competition and male bonding, and signs him up for soccer. Christine disagrees, but then has her own competitive urges when fighting with Richard for attention from Mr. Harris.
Christine can't help but meddle in Matthew's love life when she meets his ex-girlfriend at a party. Meanwhile, Richard hopes to get Ritchie enthused about his contracting job.
Jealous that New Christine benefits from all the positive qualities she instilled in Richard during their marriage, Christine spites her by revealing to Richard that she gave New Christine the idea for the birthday gift she gave him.
Christine finds out her new sleep medication caused her to embarrass herself over the phone.
Christine finds out Richard's brother is gay, but not until after sleeping with him.
Christine vows to become more aware of politics when Richard scolds her about her indifference towards an upcoming election setting a bad example for Ritchie.
Trying to send an e-mail to Barb about Mr. Harris, Christine ends up sending it to all the parents from school, nearly costing him his job.
Christine can't resist meddling when Lindsay hires Richard to remodel her bathroom, while Matthew enjoys his first trip to Home Depot. Meanwhile, Christine and Richard debate on who should give Ritchie the 'birds and the bees' talk.
The stresses of going to a wedding with Richard and Barb are multiplied by Christine's agreeing to be designated driver, depriving her of some much-needed alcohol.
On their way to Ritchie's desert camping trip, Christine, Richard, Matthew, and Barb stay at a seedy motel and get on each others' nerves.
Christine realizes that one reckless evening may have jeopardized her chance to begin dating Mr. Harris.