What Counts as Cheating in a Relationship Is More Complicated Than You Think

So, What Actually Counts as Cheating in a Relationship?

Sleeping with someone who isn’t your partner? Yeah, you probably don’t need me to tell you that’s going to count as cheating in most monogamous relationships. But what about flirting with a coworker? Sexting someone you have zero intention of ever meeting IRL? Downloading a dating app “just to look”? Watching porn? DMing your ex at 1 a.m.? Suddenly, the answer to “What counts as cheating?” gets a whole lot less obvious.

That’s because—surprise—there isn’t one universal definition of cheating, says Madhuri Jha, MPH, LCSW, a psychotherapist and founder and executive director of Thriving Mind Clinic. “It depends on the boundaries established within a relationship and whether or not a partner feels like those mutually agreed-upon boundaries are being respected or violated.”

Of course, that doesn’t mean anything goes just because you and your partner never sat down and drafted an official Terms and Conditions of Being Together. Secrecy, deception, and what you’re actually seeking from an interaction can all help determine whether you’re getting dangerously close to—or straight-up crossing—a relationship boundary.

So, before you panic over a flirty DM or start building a legal defense for why downloading Hinge technically isn’t cheating if you never met anyone, let’s get into what cheating actually means, the gray areas that make it so complicated, and how to figure out where the line is in your own relationship.

At its core, cheating is about violating the boundaries or agreements you and your partner have established around romantic, sexual, or emotional connections with other people. And that applies whether you’re monogamous, non-monogamous, or polyamorous: What matters is whether you’re honoring the agreements you’ve made with each other.

Secrecy can also be a pretty big clue that you’re crossing a line. “If you need to hide it, you’re likely cheating,” says Angelika Koch, relationships and breakup expert at Taimi. That doesn’t mean partners are entitled to know every single thing the other person says, does, or thinks, but if you’re deliberately hiding an interaction because you know your partner would consider it a violation of your relationship, it’s probably worth asking yourself why.

What Is Emotional Cheating?

Emotional cheating generally happens when a relationship with someone outside your partnership starts taking on the romantic intimacy, secrecy, or emotional investment you’d typically associate with a partner. That can include sharing vulnerabilities you’d normally reserve for your partner, developing romantic or sexual feelings for someone else, or increasingly seeking that connection over the one with your partner.

That doesn’t mean having a close friend—or even being deeply emotionally connected to one—is automatically cheating. “You can prioritize a close friend without making your partner feel isolated or rejected, and you do not feel sexually or romantically attracted to them,” Jha says. The bigger red flags are secrecy, romantic or sexual feelings, and withdrawing from your partner in favor of the other person. And an emotional affair doesn’t have to become physical to “count” if the connection itself violates the boundaries of your relationship.

So, Is Flirting Cheating? What About Sexting, Porn, and Dating Apps?

Then there’s the gray-area stuff: flirting, sexting, porn, dating apps, and social media. “Various couples will have various perspectives regarding these behaviors,” says Jaime Bronstein, LCSW, resident therapist at Dating.com. “Instead of categorizing them under one name, we feel that the couple must talk about these issues and set a common understanding of what is acceptable between them.”

Is flirting cheating?

Flirting can be cheating if it crosses the boundaries of your relationship, but flirting itself isn’t universally off-limits. “If you are doing these activities in secret and without the permission or awareness of your partner, they can be perceived as cheating,” Jha says. “Again, it is about the intent of the behavior and whether or not you have consent and acknowledgment from your partner that you are doing it.” So if you’re deliberately hiding your flirting because you know your partner wouldn’t be okay with it, that’s worth paying attention to.

Is sexting cheating?

If you and your partner have agreed to sexual exclusivity, secretly exchanging sexual messages with someone else can violate that agreement even if you never meet up IRL. In other words, “But nothing physical happened!” isn’t necessarily a get-out-of-cheating-free card. As Koch puts it, “The foundation of cheating involves consciously hiding something you know would hurt or disrespect the relationship, but choosing to do it anyway.”

Is watching porn cheating?

Watching porn isn’t universally considered cheating. Some couples are totally fine with it, while others establish boundaries around porn or more interactive sexual content, like OnlyFans. As Bronstein puts it, “It is less about whether an individual behavior is a problem, but more about whether a particular behavior exists beyond what the two people have decided to be acceptable within their relationship.” So the question isn’t whether porn objectively “counts” as cheating—it’s whether it violates an agreement in your relationship.

Is using dating apps cheating?

You don’t have to actually meet someone from a dating app for using one to cross a relationship boundary. Secretly downloading an app, swiping, matching, or chatting with people can be a problem in itself if you’ve agreed not to pursue romantic or sexual connections with other people. “If you feel like you have to hide the behavior or interaction from your partner, pay attention to why that is,” Jha says. After all, “But I never actually met anyone” doesn’t answer the bigger question of what you were looking for on the app—and whether looking for it crossed a boundary in the first place.

Is interacting with someone on social media cheating?

Liking someone’s Instagram post or following an attractive person isn’t automatically cheating. But social media can become a place where relationship boundaries get crossed, particularly when interactions become romantic, sexual, or intentionally secretive. Jha points to less obvious examples like “confiding intimate details of your relationship with someone else you are attracted to,” hiding chemistry with someone outside your relationship, or feeling like you need to hide messages or other communication from your partner. In other words, it’s probably less about the fact that you double-tapped someone’s thirst trap and more about what’s actually happening behind those DMs.

How Do You Know If You've Crossed a Line?

If you’re not sure whether you’ve crossed a relationship boundary, consider what you’re hiding—and why. Are you deleting texts, leaving out certain details, or downplaying an interaction because you know the full story might upset your partner? Intent matters, too: Jha suggests paying attention to whether you’re sharing intimacy with someone else that you’d normally reserve for your partner or pulling away from your relationship because you increasingly prefer that outside connection.

That said, privacy isn’t the same thing as secrecy, and feeling nervous about your partner’s reaction doesn’t automatically mean you’ve cheated. But if you know you’ve violated an agreement, are actively concealing something because you know it crosses a boundary you’ve established, or find yourself bending the truth to make an interaction sound more innocent than it is, that’s a pretty good sign you need to be honest with yourself about what’s going on.

How to Talk to Your Partner About What Counts as Cheating

Ideally, you figure out what counts as cheating in your relationship before one of you does something that leaves the other saying, “Wait, you seriously thought that was okay?” Jha recommends having the conversation once you start seeing long-term potential with someone and revisiting it over time, since boundaries can change as your relationship evolves.

Be specific about what you’re actually comfortable with, whether that means flirting, sexting, porn, dating apps, exes, close friendships, or anything else that could get murky. “Don’t try to say what you think your partner wants to hear,” Koch says. “If you’re genuinely uncomfortable with something, you need to be open and say it.”

And if your definitions don’t perfectly match, that doesn’t mean one person gets to dictate the rules. Jha recommends figuring out where there’s room for compromise—and being honest about where there isn’t. Ultimately, what counts as cheating in your relationship is something you have to define together and agree to respect.