Ask her about the reforms, maybe? They're so hard to understand, she might be able to explain them well.
Apparently an interview question that comes up is qualities of a good dr... you could ask her her opinion on that. Oooh, and progression of doctors (like FY1 -> FY2 -> SHO or however it goes, I'm not really sure tbh
), although that's probably changed since she graduated.
From the sounds of it, this is a pretty ample opportunity to genuinely ask her what's on your mind... maybe she'll give you a frank account of life as a dr which'll help you in interviews as well as knowing what you've let yourself in to.
Maybe later on you could ask her to give you a mock interview, they're quite helpful from what I've heard and I think the unis in your sig tend to be the ones who do non-group interviews and who grill you (but don't quote me on that
).