A partner's affair is, without doubt, one of the hardest trials life can bring, and almost everyone encounters something like it at one point or another. So what actually drives someone to cheat? And what signs might hint that your partner is at risk of an affair? Understanding these questions can not only help us handle the crisis in front of us, but also help us guard against something similar happening in future. And should an affair occur, psychology gives us a way to make sense of the situation and respond to it.
Why affairs happen
The reasons behind an affair are often tied to emotional needs that go unmet. In the psychology of love there is a well-known framework, the Triangle of Love (Sternberg & Sternberg, 1988), which proposes that love is made up of three basic elements:
1. Passion
This refers to a powerful attraction to the other person — not only physical attraction, but also a fascination with who they are at heart. This fiery feeling is common in the early stages of romance or in a one-night fling, but passion alone makes a relationship hard to sustain over the long term.
2. Intimacy
Intimacy here goes beyond physical contact; it covers a deep understanding of the other person's inner world, their interests and their personality. This sense of intimacy exists not only between couples; it can exist between friends too.
3. Commitment
In a long-term relationship, commitment is the mutual willingness of both people to keep the relationship going. In marriage, for example, partners promise that whatever difficulties they meet — whether poor or rich, in sickness or in health — they will get through together.
The Triangle of Love holds that an ideal relationship should have all three elements at once. In reality, though, reaching that ideal state is far from easy, and that is one reason why the gaps in a relationship can sometimes lead to an affair.
When a relationship lasts, do feelings fade and lead to an affair?
In their research, psychologists have found that as time passes, the elements within the Triangle of Love shift.
Take passion as an example. This usually refers to the heat of early infatuation. When a couple first fall in love, their feelings burn hot, and this so-called "honeymoon period" may reach its peak within a few months — but passion then gradually recedes. Fortunately, however, as time goes on the intimacy and sense of commitment in a relationship tend to grow stronger. In some long-term relationships, such as between an elderly husband and wife, the couple may no longer have the passion they once did, yet their intimacy and commitment remain very firm.
What does this mean? Once a couple's relationship passes the two- or three-year mark, even if commitment and intimacy are stronger than in the early days, the natural human pull towards passion means that when one partner feels a lack of it, they may go looking for an affair. Conversely, if the passion between you and your partner is very intense but you lack enough communication to deeply understand each other's interests, personalities and shared plans for the future, then when intimacy and commitment fall short, that too can lead one partner to seek an affair.
In short, the Triangle of Love can help us assess whether our own relationship is balanced and whether any of its elements are missing. If we find a relationship is lacking one of them, we should consider whether there are other ways to make up for that gap and so head off an affair before it happens.
Traits that make an affair more likely
1. Low conscientiousness
According to the Big Five personality theory (McCrae & Costa, 2008), psychologists have found that the lower a person's conscientiousness, the more likely they are to have an affair (McKibbin et al., 2014). People high in conscientiousness have a strong awareness of social norms and personal responsibility; they tend not to break social norms lightly, they work to keep their relationships stable, and they have stronger self-control — all of which makes them less likely to cheat.
2. Low agreeableness
Another important factor in the Big Five is agreeableness. People high in agreeableness are usually more understanding and accommodating towards their partner and others; they are good at resolving problems through negotiation rather than conflict. By contrast, people low in agreeableness may overlook a partner's feelings and needs, which raises the likelihood of an affair (McKibbin et al., 2014).
3. A tendency to avoid problems
When a partner tends to avoid problems, their risk of an affair also rises. Faced with dissatisfaction in a relationship, if one person chooses avoidance rather than seeking a solution, the problem will persist or worsen. Needs that go unmet may push them to look for a new partner to meet those needs, and that can lead to an affair.
By understanding these traits, we can better recognise the behavioural patterns and personality factors that may lead to an affair, and so take preventive or remedial steps within a relationship.
How should you respond when a partner has an affair?
A partner's affair is, without question, an intensely challenging situation, one that involves no small amount of value judgement and emotional choice. Different people react to an affair in different ways. Some may choose to forgive and patch things up with their partner, while others may decide to end the relationship. In the process of deciding, one core question is: how much does this relationship mean to you, and can you accept and overcome your partner's affair? Here are some ways to approach it:
1. Assess your partner's mindset
First, it is important to assess whether your partner is genuinely remorseful and willing to address the root problems that led to the affair. This includes, but is not limited to, improving communication between the two of you, resolving any emotional distance, or reassessing and adjusting each other's expectations and needs. If your partner shows a willingness to work at it together and repair the relationship, that may be a starting point for rebuilding trust.
2. Self-reflection
Second, self-reflection is also an indispensable part of the process. You need to ask yourself: am I ready to let go of the past and recommit to this relationship? Can I accept the experience of my partner's affair and move forward together? The answers to these questions will directly shape your decision.
3. Professional guidance or counselling
Finally, if both of you choose to work through the affair together, then seeking professional guidance or counselling may be a wise choice. Professional guidance can provide the tools and strategies you need to help both partners understand each other's needs, improve how you communicate, and work together to restore the relationship's health and harmony.
Download MindForest AI to build the psychological resilience you need to face emotional challenges like a partner's affair
Facing emotional difficulties — especially a partner's infidelity — can trigger emotional turmoil. In situations like these, building psychological resilience becomes all the more important. MindForest is a psychology-based AI app that offers a range of tools and strategies to help you navigate the toughest moments.
1) Use psychological techniques to build resilience: the blow of a partner's affair can leave a person feeling enormous stress. The interactive courses in MindForest combine psychological insights to help you manage stress and build resilience. These courses help steady your emotions, so you can think more clearly and, in turn, support emotional healing.
2) An AI guide offers personalised advice: MindForest includes a dedicated AI guide that deeply understands the emotional waves stirred up by emotional difficulties such as a partner's affair. This guide offers emotional support and targeted advice, helping you handle the pain with mature emotional wisdom and so restore your emotional balance.
3) A reflective insight journal supports self-discovery: when facing emotional challenges, recording your emotional journey is very important. The insight-journal feature in MindForest lets you record your feelings and reactions, strengthening self-awareness and helping you identify emotional triggers. This helps you handle the dynamics within an emotional relationship more effectively, and supports personal growth.
By using MindForest, you will master the skills needed to manage emotional stress effectively, and build the psychological resilience needed to overcome emotional difficulties such as a partner's affair. This not only helps with the emotional problem in front of you, but can also support your long-term emotional health and personal development.
When facing a partner's affair, we must first attend to our own feelings
There is a well-put saying: "Once may be mere chance, but if the same thing happens a second time, it may become the norm." This rings especially true when dealing with an affair. When we face a partner's betrayal, we should not blindly try to win the relationship back while ignoring our own feelings and dignity. In a situation like this, setting clear boundaries and protecting our self-respect is vital. This not only helps safeguard our own emotional health, but is also the most basic respect we owe ourselves. Faced with the possibility of another affair, we need to weigh our own position and our future actions carefully, to make sure we do not repeat the same mistakes, and to protect our long-term well-being and mental health.
References
McCrae, R. R., & Costa, P. T., Jr. (2008). The five-factor theory of personality. In O. P. John, R. W. Robins, & L. A. Pervin (Eds.), Handbook of personality: Theory and research (3rd ed., pp. 159–181). The Guilford Press.
McKibbin, W.F., Miner, E.J., Shackelford, T.K., Ehrke, A.D., & Weekes Shackelford, V.A. (2014). Men’s mate retention varies with men’s personality and their partner’s personality. Personality and Individual Differences, 56, 62-67.
Sternberg, R. J., & Sternberg, R. H. (1988).Triangle Of Love. Basic Books.
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