Boundaries: The Conversation Most Couples Skip
Look through the list of 1,000-plus things to do before their wedding, and you’ll find one important thing usually missing. Most couples never have a serious conversation about the boundaries of their relationship.
Maybe they just assume that the important ones were baked into their wedding vows. They said something about forsaking all others, nodded in agreement, but never talked about what that actually meant. They assumed it was obvious. In most marriages, that assumption holds… until something tests it.
One uncomfortable finding in recent surveys is that roughly a third of people define emotional cheating differently than their partner does. That difference is sometimes enough that one person can be entirely certain they haven't crossed a line while the other is certain they have, even though both are describing the same behavior.
That vagueness explains a particular kind of struggle that couples sometimes experience: one partner is defending themselves against a charge they don't think applies, the other can’t understand how that defense is even possible.
Both partners approach this conversation with different perspectives. The hurt or anxious partner has an incentive to draw the boundary lines as big and bold as possible. The one accused of breaking trust has an incentive to view the lines as less clearly defined, even with gaps, to argue that no lines were intentionally crossed.
Neither of those viewpoints is necessarily malicious, but both prohibit a productive outcome. They need a conversation that helps them produce a shared, honest definition of relationship expectations—not a treaty negotiated by two people motivated by self-protection.
In my work with couples, I find that discussions of relationship boundaries often quickly devolve into creating a list of banned behaviors. A version of this focus is circulating online right now, usually under the heading of micro-cheating: don't like her photos, don't keep his number, don't have lunch alone, don't text after nine. It's appealing because it's concrete. It also doesn't work for two reasons.
The first is that it's unenforceable without surveillance, and a marriage where one person audits the other's behavior against a list isn't a marriage that is building (or rebuilding) trust. It's a marriage that has replaced trust with monitoring.
The second is that the list is always incomplete. It’s impossible to create an exhaustive list. And since behaviors have infinite possibilities, anyone determined to stay “technically” compliant while violating the spirit of the agreement will find ways to compromise.
What works better is a principle. The most useful one I've seen is a single question: would you do this exactly the same way if your partner were standing here? If the answer is no, that probably tells you enough. The specific behavior matters less than the fact that it had to be hidden.
That question scales to situations no list anticipated, and it puts the responsibility inside the person doing the behavior rather than on the partner watching.
That doesn’t mean couples don’t need to talk about boundaries. They do. They should view boundaries as their agreed-upon definition of what is left out of their relationship and what should be expected within it. Every couple creates their own unique description of what they are building together.
My Building Us course has an entire section that guides couples in defining their unique expectations for their relationship. The exercise asks each partner to consider their views on a wide range of boundary issues (time, money, relationships, sex, privacy, family, etc.) and then compare their responses. Consider this list of questions as a way to start:
What kinds of relationships outside this marriage do we each consider normal and healthy? Where does that stop being true?
Is there a difference between something private and something hidden? If so, what is it?
What counts as a relationship: a coworker? An app? A gamer companion? AI? Someone you've never met in person?
What do we do if one of us notices ourselves drifting toward something? What's the actual first step, and who initiates it?
Those conversations can sometimes be hard. If we’re being honest, it may require us to be vulnerable. Maybe that’s why we avoid them. Or maybe we’re just naive, believing that trust will never be an issue in our relationship. But that thinking leaves room for misunderstanding and hurt.
Start a new conversation. Ask your partner: What specific things do you think should be kept out of our relationship? Then ask: What should we expect from the ways we love each other? Don’t view this as a measuring stick to use against each other, but as a guide to help each of you respect, secure, and build your life together.
