Drama in the workplace. What do I do?

So this situation has arisen at work with a girl that I have rather regular dealings with. She seems nice enough and usually we are pretty friendly no problems (I'm newly hired BTW) but occasionally this guy who also works here has to come drop off papers and such. On rare occasions this happens in the transitional period between her shift and mine. When this happens she tends to get angry, mean and possessive and tries to control any conversation. Now I prop this up to she likes the guy. But I have no interest have expressed none have just gotten out of a bad marriage kind of messed up right now. I just want a peaceful work environment.
My question. Do I confront her about this and if so what about? And how?
Drama in the workplace. What do I do?
Add Opinion