I don't know what her deal is. I have late fines a lot. Do they take they personally?

It was awful on saturday. I was returning some movies and had no idea they were a day late and the fine is 2.00 a day. I had 4 movies and then an existing fine so my total was 10.60. She told me I couldn't check out any books until I had the fine below 10. That's fine. If it's a rule, it's a rule. I get that. But she was seriously treating me like I borrowed her Prada bag without asking. And to top it off, I had no cash on me. So I pulled out my checkbook, just to realize that I had used my last check. I was trying to be friendly and talk to her and she would not even look at me. Finally she said, "Do you have money or not?"
So I asked her if I could go out to my car quick. I had a pile of books on the counter and a movie for the kids. She didn't answer me so I just said I'd be right back and left. I dug in my car until I scrounged up 70 cents. I came in and said, "70 cents will do it right? I'll pay it in it's entirety next time I come in. Can you believe I left my house without a dollar to my name" (Why am I still trying at this point? I have no idea)
Again, not a word. Just held out her hand without looking at me.
Then I checked out my books and she said as she handed me my slip, "Let's note due dates hmmm?"
Now part of me is just trying to say she was just doing her job but man, I'm in there every single week. She coulda cut me a break. Or not cut me a break and just been freaking nice about it.