I think a lot of power of photography comes from trust. It's nerve-wracking to:

1.) Model in public
3.) Have photos taken by someone you don't know
3.) Be a woman in a social media world

You gained her trust when you showed her the photos... she could see that you were taking good photos, that you knew that you were doing and you weren't taking creepy photos. I think it's really important to essential prove that you can be trusted as a photographer. So many models have so many horror stories, so you have to work even harder to become trustworthy. When your model trusts you, then you get the best shots.