Frustrated by the waning passion in her marriage, Billie starts journaling about — and obsessing over — her wild erotic exploits with ex-boyfriend Brad.

While Cooper decides to check out the competition, Billie dwells on the passionate highs and soul-crushing lows that defined her romance with Brad.

Billie's outing with her fellow moms stirs up memories of Brad — and has her making a beeline for Sasha. Cooper unloads his marital worries.

As her thoughts continue to drift back to the connection she shared with Brad, Billie proposes a plan to put Cooper's mind at ease about her journal.

Billie seeks help to untangle her feelings about her marriage and Brad. Cooper receives a tempting proposition after a rewarding day at work.

As Brad broods over the mistakes he made with Billie, she and Cooper bite off more than they can chew in a bid to spice up their marriage.

Faced with the repercussions of their double date with Devon and Trina, Billie and Cooper arrive at a make-or-break moment in their marriage.