“How could they do this to me?”

This is a powerful, haunting question that I hear often in my practice.

When infidelity occurs, a storm of intense emotions erupts: raging anger, deep sorrow, and a fear that seems to have no end. You may find yourself constantly scanning your environment, looking for signs of more deception. Sleep becomes elusive, and your appetite disappears.

You might feel as though you are on an emotional roller coaster, swinging wildly from wanting to fix the relationship to wanting to walk away forever.

These reactions can feel overwhelming, but it is important to know that they are completely normal. They are typical responses to a deeply traumatic event. In the clinical world, we call this betrayal trauma.

The Theory of Shattered Assumptions

To understand why infidelity hurts so deeply, it helps to look at a psychological concept known as the Theory of Shattered Assumptions.

In her book, Shattered Assumptions: Towards a New Psychology of Trauma, researcher Ronnie Janoff-Bulman notes that human beings experience the world through a set of core beliefs. These baseline assumptions allow us to function every day with a sense of security.

Generally, we operate under three fundamental assumptions:

  • The world is benevolent. We believe the world is mostly safe and good.
  • The world is meaningful. We believe things happen for a reason and that there is a predictable order to life.
  • The self is worthy. We believe we are good, valuable people who deserve care and respect.

When a partner cheats, these three core pillars don’t just crack—they completely shatter.

Reeling from a Broken Reality

Infidelity forces you to question your entire reality. The world no longer feels safe or benevolent. The marriage or relationship that once served as your emotional anchor has suddenly become the source of your deepest pain.

The meaning you assigned to your shared past is thrown into question. You find yourself looking back at old memories, vacations, and conversations, wondering, “Was any of it real? Was I living a lie this whole time?”

Finally, your sense of self-worth takes a massive hit. You may struggle with feelings of inadequacy, wondering what you did wrong or why you weren’t “enough” to keep your partner faithful.

Navigating Staggered Disclosures

The trauma of infidelity is often compounded by the way the truth comes out. In many cases, the unfaithful partner doesn’t share everything at once. Instead, information is revealed in pieces over weeks, months, or even years—a painful process known as staggered disclosure.

Every time a new detail emerges, the trauma cycle resets. Just as you begin to stabilize and find your footing, another wave of deception hits, and your core assumptions are shattered all over again. You are left feeling like the ground beneath you is constantly shifting.

The Path to Healing

Rebuilding your life after these assumptions have been shattered is an incredibly challenging process. It is not something you can simply “get over” or snap out of. It takes time, immense patience, and specialized support to slowly piece your reality back together and establish a new sense of safety.

If you are reeling from the pain of infidelity, you do not have to carry this heavy burden alone. As a Certified Sex Addiction Therapist (CSAT) and marriage counselor, I provide a compassionate, non-judgmental environment to help you process the trauma, establish firm boundaries, and explore your options for the future.

Whether you choose to heal your relationship or chart a new path forward on your own, I am here to help you rebuild. Reach out today to schedule a confidential consultation.

Tim Martin, PhD, LCSW, CSAT, CPTT, CMAT is a psychotherapist specializing in sex addiction recovery, betrayal trauma, and couples healing after infidelity.