Should I be reading something into this? Do I want to?
Of course there are plenty of people that will tell you how guilty she feels. I won't because I don't know.
Honestly, I don't see anything to read into except that she's stressed about money and she thinks you're spying on her. If I were guessing I say that she knows you're still hung up on her and so she questioins what you are up to. Have you been talking to anyone about her that could get back to her? If so, don't. Somehow it sounds like she knows that you know she's looking for dates.
Since you asked, "Do I want to?", I'd say, No, you don't really want to look that closely. Take it at face value.
Notice how she responded poorly to your being Mr. Fix-it. Don't bother suggesting how she should handle things unless she specifically asks for your input.
In the end, it's not the years in your life that count. It's the life in your years. Abraham Lincoln
It is hard to fail, but it is worse never to have tried to succeed. Theodore Roosevelt