I'm not sure if this example would qualify as denial.
My sisters and I were at one time so entrenched with my mother's feelings and views. If she was mad at one of us for no justifiable reason, the rest of us were expected to turn on that sister. She expected this with our own children. After awhile, I realized my children were at risk as well as my marriage. I put some distance from my mother. The craziness really started then. Horrible lies were told about me. I was thrown out of family! It was worth seeing, finally, how sick our family was! My parents are gone, but sisters still carry on like it wasn't as bad as I recalled!