Thanks ladies for your kind words and advice. I really appreciate it because I've struck 2 direct episodes of aggressiveness, both from her and another guy. This stuff doesn't happen when people are comfortable with themselves and are welcoming to new staff. I've been taken aback by it.
Snooz, I think you are right. I woke up this morning and thought that I need to do something about it. It's really disappointing, but I'm going to have to speak directly with her about it. The reality is, what she is doing is bullying - and too many people skirt on the edges of it and it is allowed to continue. Women can be the worst.