From your WAW's POV, she's actually helping the kids because she feels that it's better for them to see her happy than sad. That's their perspective.
Right now you're lingering too much on "why can't she see..." scenarios. The fact is that right now she can't see. So what have you been doing to take up the slack?
Imagine she's like a spoiled teenager. The more you try to convince her to see your POV, she's going to do the opposite. So start being the strong confident man you are and BE THE MAN.
Be the man for your kids. Show them the right to your W's wrong. Detach your feelings for your W and concentrate on your kids for now. That thing inhabiting your W's body isn't the person you married right now.
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.