TCRS is a defined benefit pension system, unless I am mistaken. Normally (and I cannot speak to TN law here), a pension is divided up in a divorce via a Qualified Domestic Relations Order (QDRO). It sounds as if that was not done in your divorce, but your ex is now seeking it? Why wasn't it addressed in the divorce? The short answer is that you need to speak with your attorney, but she may be entitled to a portion of your retirement when you retire.