There is no way for anyone here to know the intentions of the person in question. There isn't much evidence in any case to show any motive for what she's doing and what' going on in her life unless she shared it with you. Thing is since there is no way for you to know since she's not sharing that information with you, speculation on your part is simply spinning your wheels. If you asked and she said everything is fine, dont' read into it so much that you're second guessing her answer. There is really nothing here to be concerned about at this point. who knows what the motivation was.

My advice to you is to decide whether you're going to let her give you a poke now and again or if you want to move on and leave that friendship behind.