First off, you need to understand something. YOU have nothing to feel guilty about. YOU are not the one disrupting your children's lives.
The WAS has the uncanny ability to make the LBS feel tons of guilt and feel like $h*t. They deflect all blame so that they don't need to feel responsible for anything. After all it's all their spouse's fault right? WRONG.
If your W insists on you leaving, tell her that she's the one that's unhappy so she needs to leave. Next when she threatens to take the children, tell her that if she does then you will be splitting households. Set the ground rules now and don't let her steam roll you.
Just so you understand, most of the WAS's tell the LBS to leave. My W told me to leave because she was "unhappy". Of course this was before I found out about her A. I looked at her like she was nuts and told her that if she was unhappy, then she could leave. So she did. And I'm glad I did that.
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.