Even if she knows them to be real, she does not feel they deserve worship, which can be taken as a rather Atheistic stance.
That's not an atheistic stance, though. Atheism is an absence of a belief in God/gods. While there certainly are atheists who believe that gods don't deserve worship, believing they are worthy or worship or not has nothing to do with atheism. Maybe it's "atheist-ish," in that it may be associated with atheism, but it's not an atheistic stance.
Apostate is a bit better, but it still doesn't work, because she's not renouncing her religious beliefs, she's ceasing her religious practises out of (political?) necessity. As such, I don't see the possibility of her changing her moral philosophy at all likely.