Exactly as I would react to any other human being spending their time volunteering for a class.
I will admit, part of me reacted to this like it was inappropriate... and then another part, the pat that really matters, asked, "Wait, why?!" None of these children should have any idea what she does for a living. If they do, there's another problem at hand!
People who do a legal job should not be demonized. Even if we have moral problems with their work, we should express that like adults. And we should leave the kids out of it. To them, she's just Ms. Gray, the nice lady who read them a story.