Infidelity is a topic that can bring up strong emotions, complicated questions, and deeply personal experiences. Whether you have experienced it firsthand or are trying to better understand relationship dynamics in general, you may have found yourself searching for “what is infidelity?” Learning more can offer clarity and perspective.

Infidelity can influence how people see themselves, how they connect with others, and how they process trust and healing. Understanding the infidelity meaning, why it may happen, and how it can impact mental health can help people make sense of their feelings and explore their next steps.

What is infidelity?

Infidelity, also referred to as cheating in a relationship, having an affair, or adultery, generally refers to a breach of trust within a relationship. It often involves one partner being unfaithful outside of the agreed boundaries of the relationship. What is considered infidelity can vary between couples depending on their expectations, commitments, and relationship structure, including in consensually non-monogamous relationships.

Cheating is more common than people may expect. Studies and surveys suggest that:

These numbers highlight how people’s responses to infidelity are deeply personal and vary from relationship to relationship.

Types of infidelity

People commonly describe different types of infidelity in the following ways, though these are not formal clinical categories:

1. Emotional infidelity

Forming a deep emotional connection with someone outside the relationship. This may involve sharing personal thoughts, seeking validation, or prioritizing that connection over one’s partner.

Signs it may be happening:

  • Increased secrecy around conversations or messaging
  • Turning to someone else first for emotional support
  • Comparing a partner to someone else

What it may look like:

  • Regularly texting, DMing, or calling someone late at night
  • Sharing intimate thoughts or relationship concerns with someone outside the partnership
  • Feeling more emotionally connected to someone else

2. Physical infidelity

Engaging in sexual or physical intimacy outside the relationship. This is often what people think of first when discussing cheating in marriage or relationships.

Signs it may be happening:

  • Unexplained absence or changes in schedule
  • Sudden increase in privacy around phone or whereabouts
  • Changes in physical intimacy within the relationship

What it may look like:

  • Secret meetings or overnight stays
  • Being physically intimate with someone outside the relationship
  • Creating cover stories to hide interactions

3. Online infidelity

This can include sexting, secret messaging, or forming romantic connections through dating apps or social media.

Signs it may be happening:

  • Hiding screens, deleting messages, or using private apps
  • Spending excessive time online in a secretive way
  • Emotional investment in online interactions

What it may look like:

  • Sending flirtatious or explicit messages
  • Maintaining secret social media or dating profiles
  • Engaging in ongoing private conversations that feel intimate or romantic on a dating app

4. Revenge infidelity

Acting out in response to feeling hurt or betrayed, sometimes as a way to regain a sense of control.

Signs it may be happening:

  • Expressions of anger or desire to “even the score“
  • Sudden behavior shifts following a conflict
  • Talking about wanting validation outside the relationship

What it may look like:

  • Pursuing another connection after feeling wronged
  • Using infidelity as a way to cope with emotional pain
  • Acting impulsively in response to feeling hurt or betrayed

5. Serial infidelity

Repeated patterns of lying and cheating across multiple relationships or within the same relationship.

Signs it may be happening:

  • A history of infidelity in past relationships
  • Consistent patterns of secrecy and dishonesty
  • Difficulty maintaining long-term commitment

What it may look like:

  • Multiple affairs over time
  • Engaging in new relationships while still committed
  • Repeating the same patterns despite consequences

6. Opportunistic infidelity

Occurring in situations where temptation arises unexpectedly, without prior intention.

Signs it may be happening:

  • Boundary-crossing in high-risk situations (travel, social events, etc.)
  • Rationalizing behavior as “just a one-time thing“
  • Minimizing the significance of certain interactions

What it may look like:

  • Cheating while away from home
  • Acting on attraction in the moment
  • Downplaying the impact because it wasn’t planned

7. Exit affair

When someone engages in infidelity as a way to leave a relationship or create distance from their partner.

What it may look like:

  • Forming a new relationship before ending the current one
  • Using an affair as a way to transition out of the relationship
  • Avoiding direct communication about wanting to leave the relationship

It’s also worth noting that marital infidelity and non-marital infidelity can share similar emotional consequences.

Why do people have affairs?

The causes of infidelity can be complex and layered. While there are some common themes, there isn’t a single explanation that applies to every situation.

Some factors include:

  • Feeling unseen or unheard in a relationship
  • Anxious or insecure attachment styles
  • Major life stressors such as grief, career changes, or health challenges
  • Seeking validation, admiration, or attention
  • Power dynamics or an attempt to regain a sense of control
  • Dissatisfaction or disconnection within the relationship
  • Low self-esteem or identity struggles

A 2023 study published by the Archives of Sexual Behavior found that factors like anger, lack of love, low commitment, situational motives, and sexual dissatisfaction were commonly reported reasons for infidelity.

Still, it’s important to note that having a reason does not justify the behavior. Regardless of the underlying reason, infidelity represents a breach of trust. Understanding the “why” can provide context, but it doesn’t change the impact.

Understanding the impact of infidelity

The emotional and psychological impacts of infidelity can be significant, particularly for the partner who discovers the betrayal.

Emotional and mental health effects may include:

  • Betrayal trauma and anxiety: Sometimes referred to as cheating trauma or post infidelity stress disorder, this can disrupt a person’s sense of safety and trust.
  • Shift in perception or reality: Some individuals may question their own judgment or feel confused about what was real in the relationship.
  • Overthinking and hypervigilance: Constantly scanning for signs of dishonesty or replaying events in their mind.
  • Trust issues: Difficulty trusting not only a partner but others in future relationships.
  • Grief and loss: Mourning the relationship they believed they had, including the loss of trust, loyalty, and emotional security.
  • Emotional distress responses: Feelings of anger, sadness, confusion, or resentment.

In some cases, individuals may also experience gaslighting, deception, denial, or minimization that can lead them to question their perceptions of reality.

Impact on families

When infidelity occurs within a family system, its effects can extend beyond the couple:

  • Children may notice emotional shifts or tension
  • Family routines and stability may change
  • Emotional disconnection can affect parent-child relationships

Can a marriage survive infidelity?

There isn’t a single answer to whether a relationship can recover from infidelity. Outcomes vary widely depending on factors such as individual circumstances and relationship dynamics.

Some factors that may influence whether a relationship may continue include:

  • How the infidelity was disclosed: Whether it was revealed voluntarily or discovered.
  • Willingness to engage in repair efforts: This might include consistent communication, accountability, and rebuilding trust over time.
  • External stressors: Financial concerns, parenting responsibilities, or lack of support systems can play a role.
  • Motivations for staying together: Some couples may choose to remain together for reasons beyond love, such as children or financial stability.

It’s also important to distinguish between relationship status and relationship quality. A couple may stay together after an affair, but the relationship may feel very different afterward.

Therapy for infidelity

Therapy can play a meaningful role in helping individuals and couples process the emotional impact of infidelity.

For individuals, therapy can help:

  • Process complex emotions like anger, grief, or confusion
  • Rebuild self-esteem and sense of identity
  • Understand personal patterns or boundaries

For couples, marriage counseling or couples therapy can help:

  • Create a space for open and guided communication
  • Rebuild trust gradually
  • Learn conflict resolution and emotional regulation skills

Therapy can provide a space for understanding, processing, and deciding what comes next.

Takeaway

Infidelity is a complex and deeply personal experience. While it often involves a breach of trust, its meaning and impact can vary widely depending on the people involved, the type of infidelity, and the relationship.

The emotional effects of infidelity, ranging from grief and confusion to shifts in self-perception, can have an impact on mental health. Having access to information and support can make a difference in how people process and move forward.

If this topic resonates with you, exploring support options may be a helpful next step. You can browse therapists near you at findmytherapist.com to learn more about professionals who specialize in relationships, trust, and emotional well-being.