Because she doesn't see herself as "crazy". Just concentrate on protecting your kids and try not to worry about her actions. Protect them and you first.
In these situations, it's like you're in a storm basement with the kids while the twister of your W's MLC is destroying everything outside. You shield yourself from it and protect your kids from it, then come out when the storm has passed.
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.