Saw that woman answering the door the last time I was there. I just assumed she was the Mamasan since she looked to be ~60 (my estimate); did not think she was an actual provider. Picking her was very charitable of you. However, I would have passed. When it comes to AMPs, charity isn't part of the equation.
I was there about two weeks ago specifically to see an ATF provider who was back for a very limited engagement. However, my understanding is that Ruby and June are the default providers there (even now).