Excellent Spot-on advice as usual from this site. Just wanted to add that there is nothing more attractive, and more impressive to a WS than the nobility of a strong, confident and self-respecting BS who responds chin-up with absolute and dignified resolve. This should be your first initiative. If you screw this up it will directly effect your chances of breaking her out of the fog.
Then, tell her that your heart is absolutely broken-so she doesn't think your a heartless robot, or that you are actually happy she has had an affair and is leaving. Don't want to over-do the 180. You want her to know that you love her, but also love yourself, and will not allow yourself to be disrespected, abused or harmed.
You should tell her that you love her and will do what ever it takes to repair the marriage but, you will not allow her to further harm you or the family.
You can offer her the gift of reconciliation but with the strict conditions that are outlined by this site, the previous posters, and all other conventional wisdom regarding reconciliation.
She must not separate unless she can somehow guarantee, to your satisfaction, absolutely zero contact with OM, unless she is separating to end the marriage. She must leave, and your child stays in the child's home.
An initial counseling session is OK. However, she must first comply by the rules of reconciliation laid down by the counselor, at that first session, before any further counseling can take place. You can't begin to fix the marriage until she demonstrates that she too wants to fix it.
You two are not there yet. If she separates, she will almost certainly continue the affair and the associated fog and you will be stuck in limbo.
Having her served with Divorce papers forces her to engage and consider the finality of her actions. It stops the hellish and destructive perpetual cake-eating limbo state that foggy WS's thrive in and sets them upon a direct course towards D or R. Nothing else should be tolerated-not even for an instant.
Divorce or Reconcile those are her choices.
A lot of people think that invoking the Big D will seal a certain fate. Not true. Even if after the papers are filed, even if after the D is finalized, you two still have the option of reconciling.
But you absolutely can not reconcile the marriage while the Affair is still in-progress. And, the longer you let the affair progress, the harder it will be.
Do not cooperate with her active affair in anyway. Do not help her conceal it. Do not do anything to make it more convenient. IT TAKES THREE PEOPLE TO HAVE AN AFFAIR. You only have control over the third person. Unless you want to be in an open marriage, you have the power to make it all stop right now.
You are about to take a journey either towards reconciliation with the hope of strengthening your marriage or...making a clean break, reducing the damage and setting off towards a new and different hopeful beginning. You should settle for nothing less.
[This message edited by RealityBlows at 3:02 PM, September 13th (Saturday)]