Based on your description, it doesn't sound to me like you did anything wrong at all. Sounds like she feels bad/guilty/angry...whatever...and is acting in that manner. I may see things from a little bit of a different perspective since my children were adults when I went through my D, but she seems to be acting kind of childish. How terribly unfortunate for you and the kids.
Me 52, H53 Bomb drop 9/29/2014 Divorce from XH final 12/17/2014 Marriage #2 12/31/2019 5 adult (step)daughters (3 from XH's first marriage, 2 from current H's previous relationships) 6 grandkids