I have learned that trying to figure out other people is a waste of time. You can never get in her head and figure out if she is trying to manipulate you or not. And even if she isn't consciously manipulating, she may be doing it subconsciously. I just doesn't matter.
Whatever her intentions or psychological pathos, figuring it out still gets you nowhere.
Do you feel manipulated? Do these conversations leave you feeling good about yourself or bad? If you don't want to have these type of conversations, then why are you? "Gotta go now," is my favorite way to end a conversation I don't want to be in.
L