Whitney Dillon and Mariel Lane have growing pains in their friendship. Samantha Busch pitches Amber Balcaen to husband Kyle to be his first female driver. Ashley Busch, Kurt Busch's wife, and Samantha try to bridge the divide between their husbands.
Samantha begins to wonder if it's time for baby number two; Amber hits a roadblock in her love life; Whitney struggles balancing 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; after surprising a childless couple with grant money for IVF, 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.
Sam tests Ashley's patience while visiting Ashley's family home in Virginia; Whitney throws Mariel the perfect bridal shower; Ashley surprises Kurt Busch on his 40th birthday.
The war of the wives reaches its end as battle lines are drawn and friendships are tested; Amber finally gets her moment to prove herself on the track and show KBM she is ready for the big leagues.