I have no clue but I have messed around with like 4 of my sisters friends from them approaching me and in some cases me trying to deny the. From what I know now I am on my way to messing around with 2 more of them, each with BFs. Just pay attention listen and you will find out what she wants. My sister is cool with it so I ain't worried.
I wrote a huge post here:
i-have-this-hb9-at-work-vt9239.html
Talking about how to tell if she likes you and other stuff through the books I've read. I've also learned a lot about sending signals back. That list on there pretty much shows everything on whether she likes you.