JK, sorry you're having to go through this with her, even after the agreements are in place. You are a great father and shouldn't worry about what she says about you (easier said than done, I know). Don't doubt yourself for a minute!
If anything, her instability should continue to push you to know you made the right decision in keeping the boys. You are a rock for those boys. Don't let her avalanche consume them!
Stay strong brother. This drama too will pass.
Me39 M11 : T13 D9 BD 5/31/16 In House S until 6/21/17 Divorced 10/5/18