I don't know when she was hired but it may just be "new" jitters? I know I was once accused of being clingy which surprised me but the problem was the place I'd started to work was totally unstructured and I wasn't use to that so didn't catch on right away that I had to figure out what to do myself.

Maybe you could give her enough to do so she doesn't have time for drama? Or, have her make up a schedule of some sort and give you a copy. Doesn't she "report" to you? If she doesn't quite, get her boss/your boss to talk to her. Some women will only listen to men or at least listen better to men. I'd make up a few firm lines and keep using them over and over, "______, I am working and you need to be too, please go do your work." Don't get caught listening or out back with her crying, etc. Be as consistent as you can.