Mine does the edge of the bed thing too. I think it is a combination, but I could be wrong. I think it has to do with both a lack of places to hide, and enough confidence to go exploring. I think we will find that as they get older, they will mellow out more and more. Mine has already quit trying to actually go off the edge of the bed, and just hangs his head off the edge and looks around.

Plus, you are catching her during her normal active hours. I usually handle my snakes around 5-6pm, which may not be how most people do it, I'm really not sure on that one. Basic math tells me that if you handle during the active hours, they are likely to be more active though. I always use hand sanitizer before I open the enclosure, reach in, tap on the hide, then lift it up and scoop my BP up. It's to the point where he typically just chills with me now, after about 3 months of doing that.

Not sure if any of this helps, but I thought I would share my limited experience anyhow, if nothing else, I think you can rest assured that your not reading the body language wrong, you just have a fairly confident snake on you hands.