It sort of feels she doesn't value your business if she couldn't make the effort, even if she was pissed off with you for being late. Because obviously you're not going to go back to her. Maybe she's very busy and can afford to lose a longstanding client. I do think saying it can finish early is a bit odd though, nails are either done or not. She would have been forced to finish them either way, which is annoying to be fair.