Nothing surprises me.

I'd set up a meeting with her and if she doesn't know you, give her a fictitious name (to protect your DoCS case) and tell her how "concerned" you are that you had overheard such comments and that you "understand office politics" but you "felt she had the right to know" due to the "lack of professionalism" in regard to a government office who is meant to be "working alongside JAB" in "the best interest of the children".

Lay it on thick.

You catch more flies with honey than you do with vinegar.