I still don't think it's a given that this chick is playing games.
If Findog has given the impression that he wants to keep it casual and non-exclusive, then, , maybe this is just her being casual. As someone pointed out earlier in this thread (maalox, maybe? I don't remember who), it's no more fair for guys to expect us to read their minds than it is for us to expect guys to read ours.
If it is a head , and it's entirely possible that it is, it should become pretty obvious once you're direct about what you're looking for from her. And, again, if it's a head , walk away. Quickly.
I can't stand the girls who play mind games, though. Not only because they're a pain in the ass, but because the games have made guys so ing gun shy that they're constantly looking for an angle from those of us who don't play them.