The competition heats up between Neesee and Tia, who try to out-do each other by planning separate birthday parties for Bobby Jr., so Robert attempts to increase the peace between the women and bring everyone together for one big birthday bash.

When Robert invites Tia to move into his closet space, she gets jealous when she discovers his old wedding video showing a happy Robert with his now ex-wife Neesee. Meanwhile, a misunderstanding about which videotape Tia actually found gives Neesee leverage in a battle with Robert over who gets custody of Bobby's Jr.'s old crib.

Tia finds that she can't escape Robert's ex-wife, Neesee, even in her own workplace, when Neesee volunteers to be the school's newest kindergarten ""room mom"" and forms an instant bond with Tia's best friend, Jonelle. Meanwhile, R&B sensation and movie star Beyoncé Knowles turns the tables on Robert during an interview when she starts asking him personal questions.

After Tia uses Neesee's maiden name when forging her signature on one of Bobby Jr.'s permission slips, Neesee reveals that she intends to keep Robert's last name even though they're officially divorced.

When Neesee begins dating a handsome dentist, Robert becomes jealous, but claims his concern is for Bobby Jr.

When the station does a profile on Robert's home life, he insists that both Tia and Neesee be included, but when Neesee is edited out of the version that airs, the kids at Bobby's Jr.'s school joke that Neesee must be the nanny. Meanwhile, Neesee retaliates by filing a complaint that Tia and Robert's relationship is in violation of the rule against teachers dating students' parents.

Tia moves into the house with Robert only to discover that Bobby Jr. doesn't want her there, so when Robert and Dirk fail at making Bobby Jr. feel more comfortable with the new living arrangements, it's up to Neesee to try and help her son adjust. Meanwhile, Jonelle sublets Tia's old apartment and becomes friends with the neighbors who did not like Tia.

When Jonny, a recently divorced college friend of Robert, Dirk and Neesee's, comes to town, sparks fly after he and Neesee share a kiss, but Robert isn't happy to learn that Jonny and Neesee want to take things to the next level.

Now that they're living together, Robert and Tia worry that Bobby Jr. may have actually witnessed them having sex, and to make matters worse, they believe that Bobby Jr. has drawn a picture of what he saw and fear that he may show it to his Neesee.

Bobby Jr. catches his dad, who's decked out like St. Nick, in a kiss with Tia---and comes away believing his dad is the real Santa. Also, Tia's relationship with her visiting dad becomes strained.

Neesee contemplates quitting her burgeoning catering career when Bobby Jr. begins to act out both at home and at the TV station. Meanwhile, Dirk is surprised when he falls not for a sexy superstar, but for her lawyer.

Larry, one of Tia's closest friends from childhood, pays Tia a visit which unsettles Robert when Larry admits that he wishes he was marrying Tia. Things go from bad to worse when Larry explains why. Meanwhile, Neesee and Alex take over Robert's kitchen.

Neesee is furious when she finds out that Robert has taught their son to box. Meanwhile, Alex tries a few moves on her trainer, and Tia learns that Jonelle hasn't been paying her rent.

Robert's college buddy Jonny returns to visit Neesee. Tia later asks Robert how he feels about Jonny and Neesee's relationship. He doesn't mind and offers to take the newly couple out to dinner. After a fun-filled evening, Jonny decides to take everyone out on a road trip to Las Vegas.

The gang decides to go on a road trip with Dirk and Jonelle in tow. Jonelle assists that Turtle look after Bobby while they're gone. Later, Neesee proposes to Jonny but the newly engaged couple is too scared to tell Robert whom isn't okay with it at all.

Dirk's estranged brother reveals he has had a sex-change operation. Meanwhile, Robert's mother collapses during a visit.

When Robert turns down his sister Carmen's latest ""get-rich-quick"" scheme, she pleads her case to Tia, who decides to help her, but accidentally gives Carmen money that was intended for Bobby Jr., so when Neesee's child support check bounces, a furious Neesee lets everyone know about it. Meanwhile, Dirk and Jonelle try to start a romance.

Although Tia wants to have their wedding on the beach or on a mountaintop, Robert is convinced that she really wants an expensive shindig. So, to make extra money to pay for it, he appears in a TV commercial for a car dealership. Meanwhile, Bobby gives a girl he likes Neesee's old engagement ring.

Robert doesn't realize he has completely forgotten Tia's birthday until Neesee and Bobby arrive with a present, so he enlists Neesee's help to cater and pull together a party that's a surprise for everyone involved. Sure that Robert hasn't forgotten her birthday, Tia anticipates his surprise, but certainly doesn't expect getting stuck in the car while Robert reports on a stuntman-union strike.

When Robert and Neesee learn that Bobby doesn't socialize with the other kids in his school, they immediately book a playdate for Bobby with the most popular kid in class, Sammy, but things get awkward when Sammy's mom Traci comes on strong to Robert right in his own house. Meanwhile, after discovering that Bobby's shyness stems from a fight with Alex's son, Neesee and Alex attempt to reconcile the boys' friendship, but end up arguing over whose son should apologize first.

Close to the wedding date, Robert and Tia start having vivid nightmares involving Neesee, making Tia realize that spending the rest of her life with Robert also means spending the rest of her life with Neesee, causing her to re-examine her relationship with Robert. Tensions at home affect the tired couple, putting them out of sync at the gang's tango lessons, taught by Antonio.