Let's see.
Ava Addams started out doing solo softcore photo galleries and videos for Mac & Bumble. Then according to the iafd, she did scenes as a non-sex extra in the Reality Kings Network for the
In the VIP website. Then lesbian scenes over at Reality Kings. Then live solo cam shows for Naughty America. It seems her first b/g scene was with James Deen for Jules Jordan in 2009 in "Titty Sweat 1" scene 3. It says it was a facial.
Looking over at data18.com, and her chronological scenes. On page 7, we have that scene as her first ever b/g scene.