Can Cheaters Really Change? The Truth About “Once a Cheater, Always a Cheater”

Can cheaters change? The honest answer is yes, but not in the way most unfaithful partners think, and not as often as most betrayed spouses hope.

Image by KonstantaH  

By Doug

A betrayed woman in one of our mentoring sessions asked me something I get asked in one form or another all the time: “Can he actually change? Or is the saying true, once a cheater always a cheater?”

She’d already been through the D-day, the painful emotions, the conversations that went in circles, etc.  Now she was in that difficult place where she had to decide whether to rebuild or walk away, and she needed an honest answer, not a motivational poster.

So I gave her one. And I’m going to give you the same answer here, even though parts of it may be hard to hear.

The short version: Yes, people can change. But the kind of deep, internal change that actually protects a marriage going forward is a lot rarer than most unfaithful partners think when they’re staring at the damage they’ve caused.

The Path to Introspection After an Affair

What “Once a Cheater, Always a Cheater” Gets Right

The old saying exists for a reason. Statistically, people who have cheated once have a higher likelihood of cheating again than people who have never cheated. One study found that people who reported cheating in one relationship were roughly three times more likely to cheat in a subsequent relationship.

More importantly, anyone who spoken to a betrayed spouse in their second or third D-day knows how devastating it is to hear, “I believed him when he said it would never happen again.”

So the skepticism that exists in that phrase isn’t cynicism. It’s pattern recognition. And if you’re the betrayed person, trusting that instinct is not unfair to your partner. It’s wisdom.

Where the saying breaks down is in what it implies…that change is impossible. That the character of a person is permanently defined by their worst behavior. That isn’t true either.

The Difference Between Stopping and Changing

This is the distinction I find myself making more than almost any other in our mentoring work, and it’s the one I feel matters most.

I’ve found that most of the time, unfaithful partners do stop cheating after they’re caught. (Sometimes right away, sometimes it takes a while.) The affair ends. The contact gets cut off. The behavior, at least outwardly, changes. And in many cases, it stays that way. They never cheat again.

But stopping is not the same as changing.

Stopping means the behavior ended. Changing means something shifted internally, at the level of character, values, self-awareness, and accountability, that makes the behavior unlikely to return even under pressure.

“He stopped seeing her. But I never felt like he really understood what he’d done to me, or why he’d done it in the first place. It was like he just wanted everything to go back to normal.”

That’s one of the most common things I hear from betrayed spouses who are still hurting months or years after the affair ended. The behavior stopped. The marriage continued. But something still felt off, because it was.

The unfaithful partner had managed the crisis, but they hadn’t done the work.

Will I (Or My Spouse) Have An “Affair Relapse?”

What Real Change Actually Looks Like

Real change after infidelity is possible. Linda and I have seen it and we’ve lived some version of it ourselves. But it looks very different from what most people expect.

It is not a sudden transformation. It is not a grand gesture, a tearful apology, or a renewed wedding vow on a beach somewhere. Those things may be meaningful, but they are not change.

Real change tends to look like this:

1. Genuine accountability without defensiveness

The unfaithful partner stops explaining why it happened in ways that subtly shift blame, whether that’s blaming the marriage, the emotional distance, their childhood, or stress at work. They get to a place of owning it fully, because they’ve done enough internal work to actually see it clearly.

2. Understanding the why at a deep level

Most people who cheat know how it happened in the logistical sense. Real change requires understanding why it happened at a character level. What need was being fed? What boundary wasn’t in place? What was being avoided? What does this say about who I was at the time? This kind of self-reflection and digging is uncomfortable, and most people avoid it.

3. Sustained transparency, not temporary transparency

Early after D-day, most unfaithful partners agree to share passwords, check in frequently, and stay close. Over time, that often fades as life gets busy and the crisis feeling fades. Real change means transparency becomes a value, not a temporary concession.

4. Consistent empathy for the betrayed partner’s ongoing pain

Betrayal trauma doesn’t end in a few months. Betrayed spouses usually experience triggers, setbacks, and waves of grief, often for years. An unfaithful partner who has genuinely changed doesn’t get impatient with that process. They understand they caused it, and they stay present for it even when it’s hard.

5. Doing the work without being pushed

This one is probably the clearest signal. Is the unfaithful partner pursuing their own growth, whether that’s individual therapy, reading, coaching, or honest self-reflection, without being prodded? Or are they doing the minimum required to keep the marriage together? Real change is self-directed and it doesn’t need an audience.

Why Real Change Is Harder Than It Sounds

I want to be honest with you about something, whether you’re the betrayed spouse or the one who was unfaithful.

The kind of deep internal change described above requires something that most of us, frankly, are not good at. It requires sitting with genuine shame without either collapsing under it or defending against it. It requires sustained humility over months and years, not days. It requires a willingness to keep revisiting painful territory when every instinct says to move on.

Most people don’t do that work. Not because they’re bad people. But because it is genuinely hard, and there’s no immediate reward for it. The affair is over. The marriage is still standing. Life is moving forward. The urgency fades.

That’s not a reason to give up on your marriage. But it is a reason to be clear-eyed about what you’re working toward and whether both of you are actually working toward it.

What Betrayed Spouses Should Watch For

If you’re in the position of deciding whether to stay and whether real change is happening, here are the signs that tend to be most telling.

Signs that suggest real change may be underway:

• Your partner brings up the affair without being prompted, and does so with continued accountability, not just as a check-in ritual
• They show patience and empathy when your pain resurfaces, even months later
• They are actively working on themselves in some form individually, not just showing up for couples therapy
• Their behavior is consistent whether you’re watching or not
• They can talk about what drove the affair honestly, without defensiveness, and that understanding has deepened over time

Signs that suggest stopping, but not changing:

• They seem to feel that enough time has passed and expect things to be “back to normal”
• They become frustrated or withdrawn when you’re still struggling
• The transparency that was there early has faded
• They can say what you want to hear, but struggle to sustain it when the conversation gets genuinely deep
• There has been no individual work, only couples work, and even that has tapered off

False Reconciliation – Perhaps More Devastating than D-day

What Unfaithful Partners Need to Hear

If you’re the one who was unfaithful and you’re reading this because you genuinely want to change, I want to tell you that the fact you want to change matters immensely. But wanting to change and doing the work to change are not the same thing, and your partner can likely feel the difference even if they can’t always articulate it.

The work is not about proving you won’t cheat again. The work is about becoming someone who genuinely understands why it happened, who has built new boundaries and self-awareness, and who can be a safe partner not just because they’re trying harder but because something real shifted inside them.

That kind of change is slow and uncomfortable. But it’s the only kind that actually sticks.

The goal isn’t to get back to who you were before the affair. The person you were before the affair is the one who had the affair. The goal is to become someone new.

So Can Cheaters Change? Is “Once a Cheater, Always a Cheater” True?

Here’s where I stand after years of working with men and women navigating this.

The saying is not true as an absolute. People can and do change and real transformation does happen. I’ve seen it, and I’ve seen the marriages that come out the other side genuinely stronger than they were before the affair.

But the saying reflects a real and important truth that most unfaithful partners underestimate what real change requires.  And most betrayed spouses overestimate how much change has actually happened because they want to believe it.

“Can they change?” isn’t a simple yes or no. Change is possible, it’s pretty clear when it’s actually happening, and you deserve to know the difference.

Where to Go From Here

If you’re the unfaithful partner reading this and something in this article hit home, that’s actually a good sign. Awareness is the starting point. But awareness without direction tends to fade, and the work that real change requires is hard to do alone.

That’s exactly why I offer one-on-one mentoring specifically for unfaithful partners. Not to hold your hand or tell you what you want to hear, but to help you do the kind of deep, honest work that actually moves the needle, for you and for your marriage.

If you’re ready to go beyond stopping and start actually changing, I’d love to talk with you.