Discovering infidelity often begins with a gut feeling that something isn’t right. Suspicious texts, late-night calls, unusual receipts, and sudden behavior changes are common red flags that make partners question loyalty.

Some people choose to track their partners and monitor their every move, while others prefer to confront them directly. In either case, many go to great lengths to uncover the truth.

Private investigator Ali Marsh, who has over a decade of experience, shared with The Telegraph one subtle clue cheaters often give away. According to Marsh, if someone develops feelings for a colleague, they may begin to mention that person often in casual conversation. “They want to talk about them but they can’t, so they say, ‘So and so did this today,’” she explained.

This subtle name-dropping may seem harmless, but it can be an unconscious sign of emotional attachment. For Marsh, it’s one of the tell-tale indicators of workplace affairs.

Consultant psychologist Elena Touroni added another perspective. She explained that many cheaters struggle with the concept of long-term commitment. “Generally, if a person has cheated once, there’s a psychological reason behind it, meaning they will tend to do it again,” Touroni noted.

Even without being caught, cheaters often reveal themselves in other ways. Touroni said that therapists can sometimes sense dishonesty because “their stories don’t add up” or their behavior doesn’t match their supposed commitment to the relationship.

She emphasized that when one partner is still fully invested while the other acts distant or inconsistent, it’s often a sign that something is missing. The root causes may lie in personal insecurities, low self-esteem, or feelings of neglect.

Ultimately, both experts agree that cheating rarely happens without underlying issues. Subtle clues, inconsistencies, and hidden struggles often expose what words do not.