I would bring up the issues when she starts playing the blame game again. One little nugget that you can use is that people who are untruthful or cheat often believe their spouse of being the same way they are. You can use that to your advantage.
If you go dark and really start having a life, she will suspect another person on your end. This might just pry her away from someone else.
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.