Good for you! I'm the same way. I let it happen for so long that when I finally confront I end up feeling bad thinking, was I too mean or harsh? I don't think you were harsh at all in this situation. You were firm. And it's EXACTLY what she needed. She came an hour late, right? That's not okay, and she seemed to think it was.
I'm so happy that you were able to stick up for yourself! Congrats!
