[bliss7373]

I would imagine she is pretty stressed and that is at least contributing to the problem. She didn't have the best background and has had a lot of change in her life. It sounds like her prior training didn't exactly reinforce the idea of looking to the handler for direction and may have actively discouraged that response (intentionally or not). Eight weeks isn't a long time to overcome that strong prior conditioning.

I think you're right in encouraging him to make life enjoyable for her - lots of rewards and praise. I also think that he might want to make life "simple" for her - don't stress her out further by trying to jump right into continuing training. Focus on simple rules of the house and things she already knows and seems to enjoy doing- that should help to build her security and confidence.

I have seen one dog in rescue - years ago - that just never bonded with humans. He got almost zero interaction with people during his formative months, though. And he was 4 years old when he came into rescue. He wasn't aggressive in any way - he was just completely uninterested in people.