It sounds like an obvious question, but in family enterprises, it is one of the hardest to answer.

Marriage expands a family’s circle, welcoming people into our lives whom we did not choose ourselves, yet who now shape the fabric of our families—and our businesses. These in-laws can become trusted partners, creative contributors, and emotional anchors. They can also become sources of tension, complexity, and unspoken fears, especially when wealth, ownership, and the family enterprise’s continuity are at stake.

July, with its quiet marking of “National In-Law Day,” invites us to reflect on this subtle yet powerful dimension of family enterprise life. In-laws occupy a unique space: they are part of our family of choice, yet not quite of our family of origin. They stand at the intersection of personal choice and family legacy, deeply influencing the continuity of both.

The Research Connection: A Hidden Force in Continuity

Despite all we know about family business continuity, we still understand surprisingly little about the role of in-laws within it. As John Rosso’s recent review (2024) highlights, in-laws, whether formally involved in the business or not, can profoundly shape the next generation’s emotional attachment to the family business and influence their willingness to continue its legacy.

Consider a spouse who, around dinner tables and family vacations, subtly conveys disinterest or criticism toward the family business. Even without a title or board seat, this in-law’s posture can erode a next-generation member’s sense of connection to the business and to the idea of stewardship. Conversely, an in-law who respects the family’s efforts and encourages engagement can become a quiet architect of transgenerational continuity. Yet it is worth pausing to consider that an in-law’s stance is not shaped in a vacuum. We often assume that disinterest or criticism is purely a matter of individual character, but these attitudes may reflect systemic patterns: Have in-laws been included, educated, and helped to understand why the family enterprise matters to the family’s identity, or have they been kept at a distance, left to interpret the enterprise as a guarded or defensive domain? What we see as ‘behavior’ may be a mirror of the family system itself, and it may evolve over time if the system evolves too.

Rosso’s work also invites us to examine governance with fresh eyes. Many families, by default, exclude in-laws from ownership discussions or governance structures to avoid perceived conflicts or to “keep things simple.” Yet this can create a disconnect between the family’s private and business spheres, ignoring the influence in-laws already have informally. By attempting to preserve family harmony, families may inadvertently create tension or disengagement that undermines both family and business goals.

In short, whether in-laws are formally involved or not, they are already part of the family enterprise system. Ignoring this reality means overlooking a critical dimension of continuity, values transmission, and identity formation within the family.

Why Is This So Hard?

Scholars in family systems theory and family enterprise research have long noted why in-law relationships can become uniquely complex within families, and even more so within enterprising families. Over the years, research has shown that in-laws represent non-voluntary relationships within voluntary systems. You (or your child) chose a partner, but you did not choose their family. Yet in-laws become part of your shared life, requiring navigation of closeness, loyalty, and boundaries—often without a shared history, clear expectations, or mutually agreed-upon rules of engagement.

The complexity deepens because every in-law relationship inherently creates a triangle: spouse, in-law, and you. Family systems scholars have observed that such triadic structures are fertile ground for shifting alliances, competing loyalties, and unspoken expectations, which can lead to jealousy, misinterpretation, or conflict if not addressed with care. What feels like a simple personal dynamic often reflects deeper systemic patterns within the family structure.

These tensions take on additional weight in the context of family enterprises. In families with shared businesses, philanthropy, or significant wealth, what might remain a private family disagreement elsewhere can quickly ripple into governance, ownership decisions, and succession planning. Decisions about who is “in” or “out” of discussions, meetings, and ownership circles can have long-lasting effects, impacting not only family harmony but also the enterprise’s stability.

The choices the next generation makes about partners are not merely personal; they shape the emotional, financial, and governance continuity of the family enterprise across generations. In-laws influence how the next generation feels about stewardship, responsibility, and connection to the family enterprise, even if they are not formally involved in its governance or operations. Recognizing and reflecting on these complexities can help families avoid unintentional patterns of exclusion or misunderstanding, and can open pathways toward thoughtful, deliberate choices about how to engage in-laws in alignment with the family’s values and vision for continuity.

Invitation to Thoughtful Reflection

We are not suggesting that in-laws should or should not be involved in your family enterprise. Every family will and should make its own choices. Our call is for thoughtfulness about these choices:

  • How do you welcome in-laws into your family and enterprise? Is this welcoming constructive or merely polite?
  • Are there open conversations in your family about what in-laws can and cannot do within the business?
  • How do you ensure there are no hidden double standards in how different in-laws are treated across family branches?
  • Have you examined your family’s stance on whether in-laws can access ownership, and if so, why? And if not, why not?
  • Have you considered the ripple effects of excluding or including in-laws from ownership, governance, or even informal discussions about the business?

Too often, families create boundaries around in-laws by default—excluding them from ownership discussions, governance, or even casual conversations about the business, often to “keep things simple.” But each of these decisions, or non-decisions, carries ripple effects. Are in-laws left feeling disconnected, untrusted, or indifferent toward the family enterprise? Or are they welcomed, educated, and thoughtfully engaged in ways that align with the family’s values and priorities?

We are not suggesting there is a right or wrong approach to involving in-laws. Every family will and should make its own choices. Our call is for families to think intentionally about these choices, to reflect on the long-term consequences, and to consider whether current practices support the family’s vision for continuity, stewardship, and healthy relationships.

Reflection Questions for Your Family Table

Before diving into these questions, a gentle reminder: We are not suggesting you bring these topics up out of the blue at your next family dinner or board meeting. Conversations about in-laws and family enterprise involvement can be sensitive, requiring timing, care, and the right people around the table. Instead, we invite you to reflect thoughtfully, consider where these questions might fit within your current family processes, and identify who could help shape and guide these conversations if you decide they are needed.

These are not one-time discussion points, but prompts to help you begin considering what might need attention—and where you might start:

  • Who is family for us? How is this defined in our governance documents—and lived in daily interactions?
  • How do in-laws influence the next generation’s sense of stewardship? Are they fostering connection or distance?
  • What would change if we intentionally engaged with the role of in-laws? Could this open opportunities for gratitude, alignment, and resilience?
  • Are we clear about the boundaries and roles we expect in-laws to have, and ready to handle the tensions that can arise around them?
  • Are we willing to have these conversations now, before decisions or crises force them upon us?

A Different Kind of Celebration

As July 31st approaches, marking “Father-in-Law Day,” perhaps this year is an opportunity to celebrate differently. Beyond a polite call or a shared meal, consider taking a moment to reflect on the broader role that in-laws play in your family enterprise. How might you acknowledge the complexity and potential of these relationships in building the future of your family and your business?

It might be a conversation worth having around your next family table—a conversation that could strengthen your family’s story for generations to come.

Related research: The role of in-laws in family business continuity: a perspective (John Rosso, Journal of Family Business Management 2024)