What can I do to save my marriage? Help

[Sleepy]

Should I ask her " Do you want to tell me really what you did this weekend?" Should I just stay dark get my lawyer all lined up and get all my ducks in a row. Should I continue acting like nothing happened?...... Until I throw the bomb right back at her.

The OM wife says it would be playing right into her plans if I kicked her out. Because he is out now too. They would be getting what they want!