in the Interest of a Child

OPINION

SUE WALKER, JUSTICE

I. Introduction

The Mother1 and Father2 of Child appeal from the trial court’s summary judgment against them in their bill-of-review proceeding and in favor of Appellee The Gladney Center for Adoption. Because Gladney conclusively negated the third element of Mother and Father’s bill-of-review proceeding, we will affirm the trial .court’s judgment.

II. Factual and Procedural Background

On September 17, 2013, Mother and Father both signed affidavits of voluntary relinquishment, relinquishing their parental rights to Child, who was to be placed *765for adoption through…