I agree with doodler. Shes pushing buttons to get you to react. This way when you react she gets to feel less guilty. My ex did that too. This type of gaslighting wqs the worst part. Dont fall for it.
Just keep doing whats best for you and the kids and try to be as friendly as possible.
I was reading this and thinking what a great guy you are to be involved enough with your kids that you are resewrching ways to parent better. Just focus on the big pic right now, your kids.