You can tell if someone is secretly cheating by looking for changes in behavior, such as increased secrecy with their phone, vague explanations for their whereabouts, sudden interest in their appearance, emotional withdrawal, or increased defensiveness/blaming when questioned, often accompanied by altered communication patterns, less intimacy, and new spending habits. While these signs aren't definitive proof, a combination of them, especially secretive tech use (hiding screen, new apps, odd times) and defensiveness, points towards potential infidelity.
Below are 19 common signs of cheating to look out for:
There isn't one single "best" predictor of cheating; rather, it's a combination of factors, with relationship dissatisfaction, low sexual satisfaction, mismatched sexual desire, and poor communication being the strongest predictors, often alongside individual traits like insecure attachment styles, impulsivity, and a history of infidelity. Ultimately, a lack of emotional connection and unresolved relationship issues significantly increase the risk, according to this Psychology Today article, this National Institutes of Health article, and this Medium article.
11 Signs of Cheating
One thing that cheaters often do is say one thing and do another. For example, it is so easy for someone to tell you they love you, but when you never see them perform any actions that indicate that they love you like: doing something thoughtful like buying you flowers, well, then this could be a red flag.
The 3 Stages of an Affair
Carder says many studies suggest an emotional affair is just as painful for wives. In fact, he says emotional affairs become more painful as the infidelity moves through its multiple stages. The first stage is the mood-altering effect when a man sees the other woman or a message from her.
Cheating body language cue #1 – No eye contact
Too little eye contact in a conversation can be a hint your partner is having an affair. A cheater will always look away when they're asked a direct question. This is especially true when quizzed about their whereabouts.
Soft cheating (or micro-cheating) involves subtle, often digital, behaviors that cross relationship boundaries and breach trust without being full-blown infidelity, like excessive social media interaction with others, hiding messages, or maintaining secretive contact with an ex, often stemming from a need for validation but eroding intimacy and causing insecurity.
Affairs often start subtly, beginning with emotional disconnection, unmet needs (like feeling unseen or unappreciated), and blurred boundaries, frequently blossoming from friendships, especially at work, through shared frustrations, lunches, or social media, evolving from mental/emotional intimacy to secrecy and physical betrayal as individuals seek validation, novelty, or a lost sense of self, rather than a happy person usually seeking an affair.
The 80/20 rule in relationships explains cheating as the temptation to abandon a solid partner (80% good) for someone new who seems to offer the missing 20% of needs, a pursuit often leading to regret as the new person lacks the original 80%. Infidelity often arises from focusing on flaws (the 20%) rather than appreciating the substantial good (the 80%), making an affair partner seem appealing for fulfilling that small gap, but ultimately resulting in losing the valuable foundation of the primary relationship.
Surprisingly, these full-blown affairs almost never start at a bar or club. Instead, they usually begin in much more wholesome environments: The workplace. The workplace is where most affairs begin.
The 777 rule for marriage is a relationship guideline to keep couples connected by scheduling specific, regular quality time: a date night every 7 days, a night away (getaway) every 7 weeks, and a romantic holiday every 7 months, often without kids, to foster intimacy, reduce stress, and prevent routine from overtaking the relationship. It's about consistent, intentional efforts to prioritize the partnership.
Previous litera- ture has identified characteristics of the partner involved in infidelity; this study investigates the Big Five personal- ity traits (openness, conscientiousness, extraversion, agreeableness, and neuroticism) of uninvolved partners.
Interestingly enough, some individuals who cheat also exhibit signs of dissatisfaction long before they actually stray. They may withdraw emotionally from their partners or display irritability over minor issues—a signal that something deeper is amiss within themselves rather than solely within the relationship.
Silent cheating, also known as “micro-cheating,” can be a real drag on a relationship. Your partner isn't actually doing anything physical, but at the same time, they're not being totally honest about behaviors you'd associate with single people. So the signs won't always be obvious.
While the effects of infidelity can manifest in different ways within different relationships, there are some common signs that frequently accompany cheating. Becoming emotionally distant, angry, defensive, or secretive can be hints that your partner is being unfaithful, as can intense suspicion directed toward you.
In most cases, affairs end peacefully and in secret. By their very nature, there is not much of a commitment to hold them together, and a desire to do the "right thing" is usually the excuse an unfaithful spouse uses to end it. But the real reason is usually that the affair has become more trouble than it's worth.
The "3-3-3 Rule" in relationships, popularized on TikTok, offers a timeline for new connections: 3 dates to check for basic attraction/chemistry, 3 weeks to assess consistent communication and effort, and 3 months to decide if the relationship has potential for commitment or if you should part ways amicably, preventing getting stuck in a "situationship". It's a framework for slowing down, gathering information, and avoiding rushing into serious decisions too early, though it's a guideline, not a rigid law.
The Developmental Model of Couples Therapy outlines three critical stages of infidelity treatment: the Initial Stage, the Middle Stage, and the Termination Stage. Each phase can help you address the distinct emotional and relational challenges that your couples face in their journey toward healing and resolution.
Intimate Conversations: Sharing personal thoughts and secrets with someone else that you don't share with your partner. Secretive Behavior: Hiding conversations or meetings with another person from your partner. Emotional Reliance: Turning to someone else for emotional support instead of your partner.
Types of Affairs
Passive cheating occurs when a student overhears how other students answered questions, and this information influences how the student responds. The purpose of this experiment was to determine whether passive cheating took place between back-to-back classes.
How to Know if She Slept with Someone Else
Nine Common Signs Your Partner Is Cheating