I think you are confusing validation with detachment.
Here is a quote from the Board:
Detachment is a control issue because:
* It is a way of de-powering the external "locus of control" issues in your life and a way to strengthen your internal "locus of control."
* If you are not able to detach emotionally or physically from a person, place or thing, then you are either profoundly under its control or it is under your control.
* The ability to "keep distance" emotionally or physically requires self-control and the inability to do so is a sign that you are "out of control."
She is actively having an affair and disrespecting you, your marriage and your kids. And now she schedules the mediation sessions and expects your to attend? Do you want this divorce? If not, take back the control.
This is not about catering to her, as she is in an active affair, she is not logical, she is in rebellion, you are the enemy, you however are trying to save your marriage, is that right?
Don't let her persuade you that it's over until YOU say it's over!!!