First off, you should never "agree" to D if that's not what you want. Just say that you understand why your W would like to D. And that's it.
Everytime you say you want a D because it's what she wants, you're digging your own grave.
Second. No one is totally blameless. Your W had her faults as well. How did she find out about your A? How long was it, etc. And more importantly, why did you do it?
You can't say that she was digging up "ammo" for what she's doing now when all she did was find out the truth.
M-43 W-40 2D - 9 and 5
Emotion, yet peace. Ignorance, yet knowledge. Passion, yet serenity. Chaos, yet harmony. Death, yet a new life.