She is planning on attending a seminar/workshop this Sat, titled "What Women Need To Know About Divorce."
She's testing you. State your boundary regarding the affair, transparency and that if she needs to know what it's like to be divorced she can start by moving out if she doesn't agree.
She's either in or out. She's waiting on you to make the call.
Go read Overburdended's thread.
M22,H45,W45 S21/18D12 Retain faith that you will prevail in the end, regardless of the difficulties and at the same time confront the most brutal facts of your current reality, whatever they might be.
