I know parenting can be frustrating. If W makes a pattern of this poor behavior, then you should be concerned. Personally I would just document things, and be extra observant. You can set some boundaries if she doesn't change her behavior.
This is the template: "When you leave our 2YO daughter unattended, I feel .... If you ....I will..."
Did you validate how W was feeling? That does not mean you condone the behavior, just that you understand how she was feeling.
Oh, there is a pattern (not specifically of leaving her unattended - though that is part of it), and I have been documenting it. I'm not sure what boundaries I can set, though. I don't really have much recourse when she does these things, outside of telling her that her actions are not okay.
I did not validate. I wasn't really worried about Dbing at the moment, but just trying to stand up for my D. Now, I did try to stay calm about it, and not just berate her for it. I just matter-of-factly stated that it wasn't okay, and the reasons why. I know, I probably should have said something recognizing her frustration and asked if she would just make sure I was aware if she needed to step away.
