Katie confronts Dave after catching him in a private moment. Carolyn and Palek face an ongoing fertility crisis. Jamie questions Hugo's ability to remain faithful.

Jamie's doubts about Hugo persist. Carolyn is surging, but Palek seems to be losing interest. Dave and Katie argue over the value of Katie's therapy sessions. May reaches out to an old acquaintance.

Mason tells Jamie she should find someone else, but Jamie can't shake the memory of Hugo. Palek brightens after passing a sperm-crisis test, but new clouds emerge. Isabella helps her father pick out a gift for Katie that leaves both parents feeling helpless.

Katie is shocked when Dave joins her at therapy, even more so after hearing what he has to tell May. Carolyn shares a college secret with Palek, who ends up skipping her session and avoiding her calls. Rebuffed by Hugo, a troubled Jamie turns to May for guidance.

Carolyn and Palek try a more aggressive approach in their efforts to get pregnant. May suggests a first step to solve David and Katie's intimacy problems. Jamie vows celibacy, but finds Nick, whose own relationship is on the rocks, hard to resist.

May offers up a novel idea for David and Katie to save their marriage. Coming to terms with their infertility, Palek makes a revelation to Carolyn. Later, Carolyn steps up her effort to be made partner at her law firm, and Palek decides to put their house on the market.

With both kids at sleepovers, Katie and Dave get a rare night alone and make small steps towards rekindling their intimacy. Jamie's new relationship with Nick is jeopardised by the reappearance of Hugo. Palek and Carolyn change homes, but their problems continue.

Dave and Katie debate the value of continued therapy. Palek worries about losing his identity in the wake of Carolyn's recent revelation. Nick is spending more and more time at Jamie's, but she can't tell him what he wants to hear.

News from her friend Rita sends Katie in a new direction, leaving Dave to handle the household and therapy on his own. Palek finds it difficult to cope with his mounting anxiety. Jamie decides to be honest about her feelings with Nick, with unanticipated results.

May gets devastating news, but decides not to cancel her therapy sessions. Jamie and Hugo reconnect, for better or for worse. Palek's blunt revelation at May's office shocks Carolyn. Having faced the crossroads and challenges, Dave and Katie finally make a breakthrough.