A Serial Cheater: If They Cheated With You, Don't Be Surprised If They Cheat On You

A Serial Cheater: If They Cheated With You, Don't Be Surprised If They Cheat On You

“She Did It With Me”: When the “Other Person” Becomes the Victim

In my three decades as a private investigator in Connecticut, I’ve heard almost every variation of the “cheating spouse” story. I’ve seen the panic, the betrayal, and the desperate search for the truth. Yet, there’s one scenario that strikes a specific chord of bitter irony. It’s the case where a client hires Ranno Investigative Services to catch a spouse, only to confess a terrifying truth during the initial consultation: The spouse cheated on their ex-husband to be with them.

It’s the ultimate “what goes around comes around” scenario. It’s the uncomfortable truth that while the beginning of a relationship is exciting, it often sets a precedent for the end of it.

The Case: A Familiar Pattern

A few years ago, a client—let’s call him Mark—came to my Middletown office in a state of utter devastation. His wife of four years, “Sarah,” had been acting strange. She was suddenly protective of her phone, had a new passcode, and was spending more time “at the gym,” according to Investigator Ranno’s list of common cheating signs.

Mark suspected an affair. As I always do, I asked for the backstory.

“How did you two meet?” I asked.

Mark looked down, ashamed. “We worked together. She was married. She cheated on her ex-husband with me, and then left him to be with me.”

I didn’t react, but I made a mental note. In my experience at Ranno Investigative Services, this isn’t just a backstory; it’s a blueprint.

A Serial Cheater: If They Cheated With You, Don't Be Surprised If They Cheat On You
A Serial Cheater: If They Cheated With You, Don't Be Surprised If They Cheat On You

The Irony of the “Other Person”

As I began surveillance on Sarah, the irony of the situation wasn’t lost on me. Mark was living in a home built on the foundation of someone else’s heartbreak. The very behavior he was now terrified of—dishonesty, secrecy, and infidelity—was the same behavior he had once welcomed.

When I sat down to discuss the case with Mark, I asked a simple, blunt question: “If she did that to her ex-husband, why did you think she wouldn’t do that to you?”

Mark’s answer was typical of someone caught in the charm of a new, intense relationship. “Because it was different with us,” he said. “It was real love. She told me her marriage to her ex was dead anyway.”

The problem with that logic? The behavior didn’t change; only the target did.

 

The Psychology of “If She’ll Cheat With You, She’ll Cheat On You”

There is a commonly cited phrase in my line of work: “If they’ll cheat with you, they’ll cheat on you.” According to psychologists and studies in the Journal of Sex Research, this isn’t just a cynical phrase; it often holds water.

When a person cheats on a partner to start a new relationship, it indicates a few things about their character:

A Pattern of Deflection: They often blame the previous partner for their unhappiness, rather than taking accountability for their actions.

The Thrill of the New: They may crave the adrenaline rush of secrecy, power, and attention that comes with an affair, a pattern they may repeat once the “newness” of the current relationship wears off.

Lack of Long-Term Commitment: It demonstrates a willingness to abandon a commitment when the going gets tough or when an easier, more exciting option appears.

Mark wanted to believe that he was the “exception” to this rule. But, as I told him, people rarely change their core coping mechanisms without deep, professional, and often difficult, self-reflection.

A Serial Cheater: If They Cheated With You, Don't Be Surprised If They Cheat On You
A Serial Cheater: If They Cheated With You, Don't Be Surprised If They Cheat On You

The Truth Exposed

Ranno Investigative Services specializes in finding the truth through discreet surveillance. In this case, it didn’t take long.

Within a few days, my team followed Sarah to a local hotel. She wasn’t at the gym. We captured high-definition video of her paying for a room, walking down the hall, and entering a room with another man. It was the same, precise, and deliberate betrayal she had enacted years before.

When I handed Mark the investigative report, the photos, and the thumb drive, his initial shock quickly turned into a dull, resigned sadness. He knew I was right.

The Lesson: Looking Beyond the Surface

When I catch a cheater, I don’t just deliver evidence; I provide clarity.

If you are currently with someone who cheated on their ex to be with you, it doesn’t guarantee they will cheat on you. However, it is a significant red flag. If they are willing to lie to the person they once pledged to love, they are comfortable with lying.

The question of “Why did you think she wouldn’t do that to you?” isn’t meant to cause pain. It’s meant to help the client understand that in love, as in investigation, past behavior is the best predictor of future performance.

When it comes to infidelity, Ranno Investigative Services is here to get you the facts so you can make a sound decision about your future.