Whitney Dillon and Mariel Lane have growing pains in their friendship; Ashley and Samantha try to build bridges between their husbands.

After the awkwardness at the Catwalk event, Amber meets Sam at KBM; Whitney decides to bring Mariel to Ashley's dinner party.

Samantha wonders if it's time for baby number two; Amber hits a roadblock in her love life; Whitney struggles to balance her relationships with the wives and Mariel.

Whitney and Mariel's feud drives Whitney further into the wives' social circle; Amber questions her future in North Carolina; Samantha gets more serious about having another baby.

Whitney and Mariel come face to face for the first time since their fight; a trip back home to Canada causes Amber to question her career path; Samantha wrestles with whether or not she can undergo another IVF treatment.

The ladies travel to Daytona for one of the biggest and most dangerous races of the season; Sam worries what her health issues might mean for having another child; as the race season nears the end, the clock is ticking for Amber.