Cage aggression, in regards to feeding in a separate enclosure, is an old-wives tale. Here's a nice, long, thread that goes into detail if you want to read it for yourself.
How often are you offereing food? It sounds like it may be more often than necessary, because you're concerned about her not eating, and that may actually be adding to the stress.
In general, roaming and restless behavior are signs of stress. Here's a thread on some of the other signs. Yawning constantly isn't a sign of hunger, at least not in my experience, and could actually be a sign of respiratory illness. These things point towards needing a comfortable environment with the proper husbandry (set-up).
Check out a few of the links in my signature. The Care Guide and Glass Tank Setup Guide are good places to start. Another good idea would be to post pictures of and describe your current enclosure for us.
Most ball python breeders tend to start breeding pretty late in the year and don't finish until late spring/early summer. Cooler temperatures also tend to correlate with hunger strikes. A combination of these two things could be impacting her eating habits right now, but it's really tough to tell as it could really be any number of factors.