By vulnerable you mean she is with no defenses because of me or because she lets herself go and enjoys what she is in?

I am confused since this person is very retreated, she doesn't show any emotion cos she is off of a painful ending relationship since a few months and even though I can see from signals, hidden ones, that she cares about me, she shows no feelings rather than friendship and care but when it happens we are intimate (meaning hugging or caressing) I can then feel in my hands how she relaxes and enjoys my touch and then can see this rapid eye movement like trying to look for something in my eyes.

Thank you