After they've slept together, Lena arranges a romantic getaway on the beach to determine whether she and Martin are meant to be together.

Martin finds every way he can to avoid asking Lisa Apple if she is pregnant; Lena worries Mason is changing himself to please his new girlfriend; Maya tells Frank a made-up story about a friend who is dating someone new.

Lena and Martin battle for control. Lena wants to instill hope in the kids but Martin wants to give them reality. Milo anounces he wants to move out and go to a school for the gifted.

Lena tries to support Maya with her pregnancy, only to get accused of being too controlling; after Martin reads Mae's diary, he suspects that she is romantically involved with her teacher and panics.

Vlad announces that construction on the house is almost finished; Martin begins dating a divorcee who works in his building; Camille tries to be a good influence on Arthur's nephew.

Lena tries to figure out if Mae is romantically involved with her new friend. Martin worries about Mason's new relationship.

Camille urges Lena to become more active on social media to get her business off the ground; Martin takes over for Lena as Milo's room parent and investigates why Milo is feared by his classmates.

After a doctor's visit, Arthur learns he's under stress due to the approach of Valentine's Day; Arthur asks Camille if they can take a break from the holiday; Lena decides she wants to cook a platonic Valentine's Day dinner for Martin.

Lena confirms that she has feelings for Martin but is confused when his response is not what she expects; to escape the situation, Lena joins Camille and Maya on a road trip; Martin, Arthur, Frank and Henry chase after the women.

Martin grows suspicious of Lena's strange behavior when she begins sneaking out of the house to secretly help Lisa Apple with her baby; Martin takes Mae on a driving lesson.

Lena and Martin announce to the kids that Lisa Apple's baby is their half-sister; Mason overhears Lena and Martin's conversation about Lisa's financial difficulties and decides to start a fundraising campaign to help.

Lena and Martin plan a fun outing, only to be interrupted by a blackout; Lena urges Maya to get induced but must honor her birthing plan; Martin continues to try and figure out where his relationship with Lisa stands.

Milo complains that Grandparents Day is coming up at school and doesn't feel Henry is interesting enough to participate, so Lena and the kids urge Martin to reconnect with his long-estranged father.