If I may, it sounds like you are just not into her. The most unethical thing I see here is that you seem to be wasting your time. Your time is your greatest resource and using it up on a woman who doesn't convince you, would be a big mistake. When we first meet a woman, we can't be absolutely sure if we are going to want her further down the line, so we give her a chance. It looks to me like she's running out of chances.
Have you had that conversation about her values, her past, her motivations? It is all in the spirit of finding out if she is girlfriend material or not of course. If you have, you should know if she is worth giving a chance to or not. If not, perhaps you are simply not interested.
To be honest, my first reaction (right from the gut) was... "I would dump her"
Take care.
Brendan