If she was at her parents home, I'm sure she could have asked them to watch the kids.
She liked having you where you were originally, now you're "acting as if" and appearing to move on, the power dynamic shifts, the idea isn't that you have all the power, its that she doesn't have that power or control over you, you've taken control of yourself back and she is starting to see that.
Good job thus far, you're keeping the dialog civil as well and notice she didn't use foul language or talk down to you, continue doing what you do - she needs to learn to respect you because she can start to see that you respect yourself enough to let her go.
