Re: was it a sign for me to talk to her. HELP
The eyes never lie. Practice seeing if you can tell if she is "smiling with her eyes." Some women will smile out of courtesy because you are already smiling at them. Pay attention to see if their eyes light up when they smile at you. Also she smiled twice. Very good sign.
I would go direct if this happens again. Don't worry about negging since it could be counterproductive. Definitely be playful and neg only if you encounter resistance.
"All things are subject to interpretation. Whichever interpretation prevails at a given time is a function of power and not truth."