Yeah, you might want to double check with her. It doesn't have to be a big deal... just a very casual, "Hi there T, I'm so sorry but I was under the impression that you were providing a free consult. When I first talked to you, I thought you said you were going to schedule a free 30 minute consult so that we could see how we work together... did I get you confused with someone else?"

It sounds like you two had a pretty good rapport, so I'm sure if you approach it in a friendly manner, she can clarify. It might be ask simple as her saying, "Oops, you're right, I totally forgot - ignore that bill!" or she might say, "Hmm, no I don't remember that. I'm so sorry that I wasn't clear, but I do bill for initial consults."

Either way, you know what? It gives you some good information about how she handles conflict, just in case you were thinking of returning to see her again.

Good luck!