Understanding why we cheat in relationships

Most people don't set out to cheat. In my coaching work, I rarely meet someone who woke up one day and decided to betray the person they love. What I meet instead is someone who drifted there – slowly, quietly, often without fully admitting to themselves what was happening. By the time they're sitting in front of me, they're usually carrying two things: guilt and genuine confusion. Why did I do this? What is wrong with me?

If that's where you are right now, or if you're the partner trying to make sense of someone else's betrayal, I want to say something important: cheating is almost never really about the affair. It's information. Painful, messy information about unmet needs, unspoken truths, and a relationship – or a self – that stopped being honest a long time before anyone crossed a line.

In my practice, I combine life coaching with cognitive behavioural therapy (CBT), and infidelity is one of the areas where the two approaches can work particularly well together. Coaching creates space to explore what you truly need and where you want your relationship to go, while CBT provides tools to examine the thoughts, beliefs, and patterns that led you here in the first place. Throughout this article, you'll see both at work.

The affair is the symptom, not the root

There's a common belief that people cheat because of attraction. Someone new comes along, temptation strikes, willpower fails. Yet attraction is everywhere, all the time, and most people don't act on it. The real question isn't "Why were they tempted?" It's "What made the temptation feel like a solution?"

Underneath most affairs sits an unmet need: the need to feel seen, desired, significant, or alive again. Sometimes it's an escape from conflict we don't know how to voice. Sometimes it's a way of soothing low self-worth with someone new's attention. Sometimes it's a rebellion against a life that has started to feel like a performance.

None of this excuses cheating. It does explain it, though, and understanding is where change starts.

Start with what need went unmet

If you've found yourself cheating, or tempted to, rather than just asking yourself, “How do I stop?”, try asking, “What am I really looking for?”

What do you feel with the other person that you've stopped feeling at home? When did you last tell your partner the truth about how you feel? Where in your relationship are you performing a version of yourself rather than actually being yourself?

These aren't small questions, and I'm not suggesting you answer them in ten minutes. Sitting with them honestly, however, is the first real step.

Here's the hard truth: cheating is not a long-term solution for anything. It will never truly meet the need that's driving it. It hurts your partner, and it quietly corrodes something in you too – your integrity, your self-respect, your ability to trust yourself. The only real way forward is honesty: naming the unfulfilled need, and then creating a relationship where it can be met – with your current partner, or, honestly, with someone new.

What thinking patterns keep cheating going?

Here's something I notice with clients caught in infidelity: the thing keeping them stuck isn't just the situation. It's the story they've built around it.

For example:

• "What they don't know can't hurt them."
• "I deserve this – my needs aren't being met at home."
• "If I tell the truth, everything will fall apart."

These thoughts feel like facts. They're not. They're rationalisations – cognitive habits the brain rehearses to make an uncomfortable behaviour feel tolerable. This is exactly where CBT earns its place alongside coaching: it names the gap between what we're doing and what we value. That gap is where the guilt, the anxiety, and the double life live.

CBT gives us tools to hold those thoughts up to the light and ask: Is this actually true, or does it just feel convenient? Convenient and true are not the same thing.

What can the hurt partner do?

If you're the one who's been betrayed: you didn't cause this, and you can't fix it alone. What you can do is decide what you need to feel safe again, ask for full honesty, and set clear boundaries around rebuilding trust.

You also get to ask your own honest questions – not to take the blame, but to understand the relationship you want going forward. Healing after infidelity is a two-person job, and it only works when both people are willing to do their part.

Can a relationship recover from infidelity?

It can. I've seen couples come through infidelity stronger, because the crisis forced conversations they'd avoided for years. It only works, though, when both people are willing to look at the truth, take responsibility, and rebuild intentionally. Betrayal can end a relationship. It can also be the moment it finally becomes honest.

How coaching can support you through this

What does working with a coach actually look like in this situation? In practice, it's a structured, non-judgmental space where we work through it together, step by step.

In early sessions, we might explore what happened and what was driving it – the unmet needs, the avoided conversations, the patterns that made an affair feel like the answer. From there, we might use CBT tools to identify and challenge the thoughts and rationalisations that kept the behaviour going, and to build healthier ways of responding when those old patterns resurface.

Then comes the forward-looking work that coaching does best: getting clear on what you actually want, learning to communicate needs honestly rather than acting them out, and – whether you're rebuilding with your partner or moving on – creating a relationship built on authenticity rather than avoidance.

For couples, this can also mean developing practical tools for rebuilding trust: honest check-ins, agreed boundaries, and new ways of talking about difficult things before they become dangerous silences.

You don't need to have it figured out before you reach out. Not having it figured out is usually exactly the right place to start.