Introduction
Betrayal in marriage—or what is known in psychology literature as “marital infidelity” or Marital Infidelity—is one of the most painful crises that an emotional relationship can experience. This phenomenon is not limited to sexual activity outside the boundaries of marriage; rather, any kind of secretive relationship—emotional or even virtual—accompanied by deception and concealment and that violates the boundaries of marital commitment falls within this category. Recent research in the field of family therapy indicates that, regardless of its form, betrayal has profound psychological consequences for both partners—and especially for the harmed partner.
What Is Marital Betrayal and Why Does It Happen?
Marital betrayal can be understood as the violation of an unwritten but fundamental contract; a contract formed on the basis of honesty, emotional exclusivity, and mutual trust. Qualitative studies conducted on midlife couples have shown that betrayal is usually not the result of a single factor, but rather a combination of contributing factors: a gradual emotional distance between partners, failure to meet the needs for intimacy and communication, unsafe attachment patterns that make a person more vulnerable in adult relationships, and in recent decades, widespread access to social networks, which has significantly increased opportunities for maintaining secret connections.
Research recently conducted in the area of attachment styles and marital betrayal shows that people with anxious or avoidant attachment styles are at greater risk of getting involved in extramarital relationships or for experiencing more intense reactions after discovery. These findings emphasize that betrayal should not be viewed solely as an “individual ethical choice,” but rather examined in the context of relationship dynamics and each partner’s psychological history; without, however, ignoring the individual responsibility of the unfaithful person.
What Happens to the Harmed Partner
One of the most important findings in research from recent decades is that the psychological reaction of a person who has been cheated on is, in many ways, comparable to stress reactions after a traumatic event (PTSD). Some researchers use the term “post-betrayal stress syndrome” to describe this condition. In it, the harmed person experiences unwanted and intrusive reminders from the moment the betrayal is discovered, heightened vigilance and ongoing suspicion, disturbances in sleep and concentration, emotional numbness, and, in some cases, feelings of guilt or self-blame—while the primary responsibility lies with the unfaithful partner.
It should be noted that this condition has not been recorded as an independent diagnosis in psychiatric classification systems; however, it is a precise clinical description of the suffering that many clients report in therapy sessions and is often diagnosed in the form of an adjustment disorder, major depression, or generalized anxiety disorder. Research published in reputable family therapy journals, including a study published in 2025 in the Journal of Marital and Family Therapy, shows that after discovering the betrayal, the harmed partner experiences a complex decision-making process about whether to continue or end the relationship, accompanied by severe emotional fluctuations, an identity crisis, and questions about the meaning of the shared past.
The Threefold Harm: Individual, Relationship, Family
Marital betrayal is not only an individual event—it involves a circle of effects. At the individual level, both partners may experience a drop in self-esteem, feelings of shame or guilt, and in some cases, depressive thoughts. At the relationship level, trust—which is the main pillar of marital intimacy—is severely damaged, and restoring it usually requires a long process and specialized support. At the family level, especially in families with children, research shows that children are also indirectly affected; either through observable family tensions or through changes in their attachment patterns and their trust in future relationships.
Can a Relationship Be Rebuilt After Betrayal?
The answer of today’s family therapy research to this question is hopeful—but conditional: yes, rebuilding is possible, but it requires a conscious, time-consuming process, often guided by a specialized therapist. Data-grounded theory studies that have examined the healing process of couples have identified a few general stages: first, the crisis and turmoil stage, in which emotions such as anger, disbelief, and helplessness predominate; second, the meaning-making stage, in which partners try to understand “why this happened” and which relationship vulnerabilities contributed to it; and third, the rebuilding stage, in which—if both partners want to—trust is gradually re-formed through clear, honest, and predictable behaviors. It is important to emphasize that this path is not linear, and emotional relapses are natural.
Effective Therapeutic Approaches
Clinical research published in recent years has assessed several therapeutic approaches for working with couples involved in betrayal:
• Emotionally Focused Couple Therapy (EFT): This approach focuses on rebuilding the bond of secure attachment between partners and helps the harmed partner express their complex emotions, while supporting the unfaithful partner to take emotional responsibility without evasion. Several comparative studies have shown that this method is effective in increasing intimacy and the capacity for forgiveness in harmed couples dealing with betrayal.
• Acceptance and Commitment Therapy (ACT): Recent research has shown that, by helping a person accept painful emotions without avoiding or suppressing them—and guiding them toward behaviors aligned with personal values—this approach can improve attitudes toward betrayal and emotional regulation in harmed women.
• Schema Therapy: In cases where the root of the unfaithful behavior or the harmed partner’s intense reactions goes back to early maladaptive patterns formed during childhood, schema therapy can enhance relationship quality and emotional regulation.
• Integrative Behavioral Couple Therapy): This model, presented in more specialized research, offers couples a combination of emotional acceptance and behavioral change to help them move past the crisis of betrayal.
Choosing between these approaches should be made by a specialized therapist in line with the couples’ personality traits, the severity of the harm, and their shared goals.
A Few Practical Tips for Couples Involved in Betrayal
• Avoid making quick judgments about the future of the relationship. Deciding whether to continue or end the relationship at the height of emotional crisis is usually not a stable, conscious decision.
• Seek specialized help, not just advice from acquaintances. The emotional complexity of this crisis requires a structured therapeutic framework.
• The harmed partner should know that their intense reactions are natural and treatable, not signs of weakness or a “reaction that is too much.”
• The unfaithful person must take responsibility for their behavior without justifications, because sincere acceptance is a prerequisite for any rebuilding of trust.
• Gradual transparency and predictability of behavior, especially in the first months after disclosure, plays an important role in restoring the harmed partner’s sense of safety.
Summary
Marital betrayal is an event that can destabilize the foundation of a relationship, but today’s family therapy research shows that this crisis is not necessarily the inevitable end of the relationship. By accurately recognizing the underlying dynamics, accepting the real suffering of the harmed partner as a valid psychological reaction, and using proven therapeutic approaches, many couples can not only get through this crisis, but also rebuild a relationship with a higher level of awareness and deeper intimacy. What determines this path is the genuine willingness of both partners to face the truth and to accompany a professional therapeutic process.
This article is prepared by referencing published research findings in specialized family therapy and couple psychology journals and is intended solely for general informational purposes, and does not replace in-person specialized counseling.