Betrayal, Infidelity & Trust: Dr. Stan Tatkin on Why Relationships Fail (and How to Repair Them)

From Relationship Renovation: Marriage Advice, Intimacy & Couples Communication EJ and Tarah Kerwin

What actually causes betrayal in relationships?

Is it about sex, disconnection, or something deeper?

In this episode, we sit down with Dr. Stan Tatkin, founder of the PACT Institute and one of the leading voices in relationship science, to break down what really happens when trust is broken—and what it actually takes to repair it.

Dr. Tatkin challenges many common beliefs about infidelity and introduces a powerful reframe:

Betrayal isn’t just about what happened.

It’s about what was hidden.

When critical information is withheld, it can completely destabilize a relationship—creating symptoms that often mirror trauma, including anxiety, obsession, and loss of safety.

We explore why betrayal impacts the brain so deeply, why many couples struggle to recover, and what separates relationships that survive from those that don’t.

In this episode, we discuss:

• Why betrayal is a trauma response, not just a relationship issue

• The real definition of infidelity (beyond cheating)

• How withholding information destroys trust and agency

• Why “why did this happen?” is often the wrong question

• The role of accountability, transparency, and repair

• The three phases couples move through after betrayal

• Why most relationships fail after infidelity—and what it actually takes to rebuild

Dr. Tatkin also introduces one of the most important ideas for long-term relationship success:

Relationships don’t fail because of love.

They fail because they were never designed for safety.

This episode is essential listening for anyone navigating betrayal, rebuilding trust, or wanting to understand how to create a relationship that can withstand real-life challenges.

Key Takeaway:

You don’t repair trust through words—you repair it through consistent, observable change over time.