Ugh. That's rough. I, too, would change my hours to 8am opening, and charge her an hour extra for a 7 am drop off. This happened to me recently, too. Daycare mom showed up with her two kids at 7:30. I was still in the shower!! Every day since July, they have come between 8 and 8:15. The mom texted me later, not with an apology or explanation, but saying that she was surprised that I wasn't ready because my handbooks says hours are 7:30 to 5:30.

Yeah. And this isn't Walmart. This is my house. You don't just get to show up when you feel like it.