I'm afraid if that was me if be the one facing police charges as I would have gone totally mama bear on her and literally tried to rip her limb from limb... Then regretted it as is not the example I would want to set for my kids :/
I would give the police a call though and see what they can do. I would want her to know that she can't get away scot free for treating a child like that.
Big hugs to you and your daughters x
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