Infidelity—when a partner violates an agreed-upon exclusivity boundary in a romantic relationship—is one of the most painful and destabilizing experiences a couple can face. Understanding why partners cheat can shed light on both prevention and recovery, and of equal importance is how a skilled therapist can support healing—whether the couple stays together or parts ways. In this article I’ll explore major motivating factors behind infidelity, and then explain how therapeutic intervention can aid the betrayed partner and the relationship itself in moving forward.
Why do partners cheat?
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Sexual dissatisfaction or desire for variety
Research shows that one consistent motivator for infidelity is unmet sexual needs: wanting more frequent sex, different kinds of sexual experiences, or feeling unfulfilled in the sexual dimension of the relationship. Psychology Today+2Simply Psychology+2 In one analysis, “sexual desire” was a key motivator for cheating when people felt their sexual needs weren’t aligned with their partner. Behavioral and Social Sciences College+1 The “forbidden fruit” factor—temptation, novelty, opportunity—also plays a role: human beings often crave variety or excitement that may be missing in a long-term union. Simply Psychology+1 -
Emotional dissatisfaction, neglect, or feeling unseen
Beyond the sexual component, many cheaters report emotional motivations: feeling neglected by their partner, lacking intimacy, or feeling that their partner no longer really sees them. Psychology Today+1 For example, one study identified “neglect” (feeling overlooked or emotionally absent) as one of eight motivators for infidelity. Behavioral and Social Sciences College Even relationships that look “fine” on the surface can lead to infidelity when partners become complacent, emotionally disconnected, or stuck in routine. Psychology Today -
Issues of self‐esteem, validation, and identity
Some people cheat not strictly because the relationship is bad, but because their self‐image, self‐worth, or personal identity feels threatened, lost, or diminished. Feeling unappreciated or not special may prompt someone to seek validation outside the relationship. Simply Psychology+1 Also, dynamics of power matter: recent research finds that partners who feel they have greater power in the relationship (or believe they have more desirable alternatives) are more likely to fantasize or act on extradyadic attraction. Phys.org -
Attachment style, personality traits, and underlying vulnerabilities
It’s also true that person-level differences matter. For example, individuals with narcissistic tendencies or insecure attachment styles (anxious or avoidant) show higher risk of infidelity. PsyPost – Psychology News+1 These traits don’t mean infidelity is inevitable, but they create vulnerabilities: e.g., someone who fears intimacy might unconsciously sabotage a close relationship; someone who fears abandonment may seek external validation. Psychology Today -
Situational factors and opportunity
Finally, context matters: opportunities, alcohol or substance use, travel, workplace proximity, friendship with someone attractive, and just being in a situation where temptations are present all increase risk. Psychology Today+1 While these don’t cause cheating in a vacuum, they can lower inhibitions and make acting on impulses more likely. -
The affair as symptom—not always the cause
While we often view infidelity purely as a symptom of a failing relationship, interestingly research shows that many people who cheat report being reasonably satisfied in their relationship. Behavioral and Social Sciences College This nuance matters: the affair may not always be only about poor relationship quality, but about deeper unmet needs or individual vulnerabilities. Recognizing this helps move the discussion from blame to understanding.
The impact of being cheated on
Being the partner on the receiving end of infidelity can lead to profound emotional trauma: feelings of betrayal, shock, grief, anger, humiliation, self-doubt, and mistrust. The “blameless” partner may question their worth, the stability of the relationship, and whether they can ever trust again. Because the foundation of safety and reliability in the relationship is shaken, what follows is often a mix of relational upheaval and internal healing work.
How therapy can help in recovery
Whether you decide to stay together or not, a therapist specialized in infidelity recovery can support the process in various ways:
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Stabilizing emotional crisis
Initially the shock and emotional flood can make rational thinking difficult. Therapists help by providing a safe space where the betrayed partner (and the couple) can express intense feelings—anger, sadness, confusion—without judgment. The professional helps regulate the emotional climate so that meaningful progress can follow. aamft.org+1 -
Clarifying options & intention
A good therapist assists the couple (or the individual) in clarifying whether reconciliation is desired, what staying together would involve (both parties’ commitments), or how to separate constructively if ending the relationship is chosen. aamft.org+1 It’s critical that the decision isn’t rushed and is based on truth, not only reaction. -
Unpacking the “why” behind the affair
Understanding how infidelity happened isn’t about excusing the behavior, but about illuminating vulnerabilities and contextual factors: What unmet needs existed? What relationship patterns set the stage? What individual issues (e.g., self-esteem, attachment) contributed? Deep understanding reduces repeated risk. reachlink.com+1 -
Rebuilding trust and safety
Trust has to be rebuilt through consistent behavior, transparency, reliable communication, and new relational contracts. Therapists guide couples through creating new agreements, expectations, and rituals that repair the rupture. They may teach communication skills, boundaries, accountability, and ways to regain closeness. Riviera Therapy+1 -
Working on individual healing and growth
For the betrayed partner, therapy may focus on self‐esteem, trauma responses (like intrusive thoughts or hypervigilance), and rebuilding a sense of self outside the affair. For the unfaithful partner, therapy often addresses guilt, responsibility, patterns that contributed to the affair, and building trustworthy behavior. South Denver Therapy+1 -
Using evidence‐based couple modalities
Some specific therapeutic approaches have strong evidence for dealing with infidelity and relationship trauma: namely, Emotionally Focused Therapy (EFT), Cognitive Behavioral Therapy (CBT) for couples, and the Gottman Method couples approach. For instance, EFT is designed to restore secure attachment bonds, which is especially relevant when betrayal produced attachment injury. Verywell Mind+1 -
Reimagining the relationship (if staying together)
Many therapists emphasize that recovery from infidelity isn’t just “going back” to what was before—but potentially forging something new: a relationship with deeper honesty, clearer boundaries, and more robust emotional/sexual connection. This reframing helps reduce the idea that once trust is broken it’s irrecoverable and instead sees the possibility of transformation. GoodTherapy
Practical tips for someone cheated on
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Seek individual therapy as soon as possible—even if your partner is not ready to go to couples therapy yet. Healing the trauma is important in its own right.
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Choose a therapist with training or experience in affair recovery specifically; generic relationship counseling may not address the unique dynamics of betrayal. Psychology Today
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If you engage in couples therapy, both partners must be genuinely committed to the process—half-hearted participation can undermine progress.
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Ask the unfaithful partner for honesty, transparency, and consistent behavior. Rebuilding trust happens through repeatedly choosing to be trustworthy.
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Be patient with yourself. Recovery takes time—sometimes months or years. Flashbacks, triggers, and intense feelings are not a sign of failure.
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Decide whether the relationship will continue, and if so, define new relational agreements: What constitutes fidelity? What are the expectations around transparency? What boundaries will safeguard intimacy?
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Whether staying or leaving, your self-worth matters. Repairing your identity and self-esteem is fundamental—as is remembering that being cheated on does not mean you were unlovable or undeserving.
When the relationship does not stay together
Therapy is still highly valuable even if you decide separation is the best path. The unfaithful partner needs to understand their behavior and avoid repeating it. The betrayed partner needs to work through grief, trauma, and rebuild trust in themselves and future relationships. A skilled therapist can support each individual through the transition and toward healthy future connections.
Final thoughts
Infidelity is deeply painful, but understanding the reasons why a partner may stray helps move beyond the binary of “abuser vs victim” into a space of comprehension, accountability, and potentially growth. And though the road to recovery is often long and hard, with skilled therapeutic support, many individuals and couples do not just survive infidelity—they find new strength, deeper intimacy, and more resilient relationships. If you or someone you care about is dealing with betrayal, finding the right specialized help is one of the bravest and most constructive steps you can take.
