I'd also encourage interviewees to ask some variation of, "What do you think my weaknesses are?"
First, it'll help you find out if the person you'll be working for thinks it's a bullshit question too. Or if she answers honestly. And since you're going to be reporting to her, so doesn't it make sense to know what you're going to be dealing with?
I actually find it weird sometimes how uncurious people seem to be about where they'll potentially be working and who they'll be working with.