I really don't think there is a dress code for going to your attorney's office unless the outfit is completely out there. Now if she were to wear this to the courthouse.....
I think many people would disagree with you image I think its neither appropriate nor mature to show up at the office of your legal representation, looking like you either rolled out of bed or just got in from a long night out of partying. Black running pants and a t-shirt would've looked a bit more sensible.

And the dresses are cute, if they are indeed dresses. Just not necessarily on her. No, actually, they could look cute, if she made herself cute wearing them. But usually, only very slim, little women can wear dresses like that and get away with it.