Have to say that I haven't commented on your thread because you're ahead of where I'm at and I don't have much advice, but reading how you're handling things has really given me food for thought.
That said, I've had a lot of experiences like you described with the hug and I think you shouldn't have read so much into it. She probably still feels conflicted and so may respond like she did. You need to be the consistent one and since she didn't refuse, good for you! But you really shouldn't have made your parting comment.
Of course, you should also monitor. You don't want to make her feel smothered or trapped either, which she might if you start doing this regularly and she can't respond.