Character Relationship Map: Splitting Up Together

Characters

• Lena (played by Jenna Fischer) — protagonist

  One half of the central couple who, after divorcing, agree to alternate weekly custody of their children while living in the same house. The off-week partner resides in a garage apartment free to date...

• Martin (played by Oliver Hudson) — protagonist

  The other half of the central couple navigating the unique divorce arrangement. He alternates living with the children in the main house while his ex-spouse dates from the garage, leading to mutual se...

• Arthur (played by Bobby Lee) — supporting
• Maya (played by Diane Farr) — supporting
• Camille (played by Lindsay Price) — supporting
• Mae (played by Olivia Keville) — minor

  One of the three children who live in the main house with one parent during their weekly rotation. Their presence drives the parents' journey of self-reflection and co-parenting adjustments.

• Mason (played by Van Crosby) — cameo

  One of the three children who live in the main house with one parent during their weekly rotation. Their presence drives the parents' journey of self-reflection and co-parenting adjustments.

• Milo (played by Sander Thomas) — cameo

  One of the three children who live in the main house with one parent during their weekly rotation. Their presence drives the parents' journey of self-reflection and co-parenting adjustments.

Canonical Relationships

Family, romantic, and professional connections based on plot evidence.

• Lena → Martin (Ex-Spouses to Rekindled Lovers) — Divorced parents navigating co-parenting boundaries, external dating, and eventual romantic reconnection while managing shared living and external complications.

  "Co-parenting boundaries established in S1, shared house agreement, accidental intimacy in S2E1, Valentine's dinner planning, mutual confession in S2E...

• Lena → Mae (Mother-Daughter) — A protective mother navigating her daughter's growing independence, emotional confidences, and early romantic awareness.

  "Mae wins musical lead and confides in psychiatrist in S1E6, Lena cheers her up and reads her diary in S2E6, Mae pushes for parental reconciliation in...

• Martin → Mason (Father-Son) — A father seeking to atone for past oversights, evolving into a mentor who guides his son through emotional vulnerability and healthy masculinity.

  "Mason asks Martin for girl advice in S1E6, Martin takes him camping in S2E5, teaches him emotional expression over traditional masculinity."

• Martin → Mae (Father-Daughter) — A father initially questioned by his daughter for outdated parenting styles, later becoming protective during her teenage romantic developments.

  "Mae critiques Martin's parenting as sexist in S1E2, Martin reads her diary and panics over suspected teacher romance in S2E6."

• Arthur → Camille (Couple & Co-Parents) — A couple navigating external dating rumors, internal relationship boundaries, and shared family influences.

  "Arthur trails Lisa Apple with Camille in S2E1, Arthur asks Camille for a Valentine's break in S2E12, Camille influences Arthur's nephew."

• Lena → Mason (Mother-Son) — A mother guiding her son through early adolescent struggles, peer pressure, and heartbreak.

  "Lena manages Mason's growing pains in S1E1, gives conflicting breakup advice in S2E4, supports his emotional expression."

• Lena → Milo (Mother-Son) — A mother balancing structured co-parenting logistics with addressing her youngest son's social integration and academic pressures.

  "Lena co-orchestrates Milo's birthday boundaries in S1E7, supports his gifted school interest in S2E4, investigates why he is feared by classmates in...

• Martin → Milo (Father-Son) — A father managing childhood illnesses and school logistics, actively engaging in his son's academic and social environment.

  "Martin cares for sick Milo in S1E4, takes over as room parent in S2E11, investigates classmate fears surrounding Milo."

• Mae → Mason (Siblings) — Brother and sister navigating typical sibling awareness, romantic curiosity, and shared family goals.

  "Sibling dynamic throughout, Mae discovers Mason's crush in S2E10, they collaborate to force parental reconciliation in S2E14."

Story Dynamics

Alliances, conflicts, and narrative interactions that evolve throughout the story.

• Lena → Maya (Close Friends & Confidantes) — Neighbors and friends who transition from casual childcare arrangements to deep emotional support during major life transitions.

  "Maya babysits kids with questionable results in S1E3, Lena supports Maya's pregnancy in S2E6, they embark on a girls' weekend road trip in S2E13."

• Martin → Arthur (Neighborhood Friends & Allies) — Loyal friends and neighbors who navigate dating mishaps, external rumors, and holiday-related emotional stress together.

  "Arthur trails Lisa Apple in S2E1, Arthur helps chase women in S2E13, experiences Valentine's stress together."

• Maya → Camille (Friends & Support Network) — Friends who provide mutual encouragement, share personal milestones, and participate in group bonding experiences.

  "Camille advises Lena on social media in S2E11, Maya and Camille join Lena on a road trip in S2E13."

Story Analysis

A two-season arc tracking divorced parents navigating co-parenting, accidental romance, external complications, and emotional growth.

Plot Progression

1. Season 1: Divorce & Boundary Setting — Lena and Martin navigate the immediate aftermath of their divorce, establish co-parenting rules, and tentatively explore new romantic lives while managing their children's reactions.
2. Season 1: Dating & House Sharing — Both parents test new relationships, face parenting critiques, and ultimately agree to share the family home during summer, leading to awkward but revealing interactions.
3. Season 2: Romantic Rekindling & House Battle — An accidental intimate moment shifts the dynamic, triggering a fierce property dispute, external pregnancy rumors, and intense emotional confrontations.
4. Season 2: Crisis & Confession — Parenting scares, diary discoveries, and Valentine's preparations force Lena and Martin to confront their lingering feelings, culminating in a vulnerable confession.
5. Season 2: Revelation & Family Reunion — Lisa's pregnancy is revealed, the family adapts to a new half-sibling, and a blackout forces Lena and Martin to reconnect, solidifying their renewed bond.