Is this Avoidant Personality 101? My GF Avoided Being Late for Work?

My girlfriend has a job where she leaves around 6 AM, arrives around 6:30 AM, and finishes at 3 PM. She told me she slept through her alarm and woke up at 11:30 AM. She asked me what she should do, suggesting a story about going to the ER and just waking up. I told her not to lie about things that can't be proven and that it's better to just say she overslept, apologize, and go in to work for the remaining 3 hours. But she said she couldn't send a text because she was too scared and trembling, and asked me to come over to her place. I couldn't go because of my own schedule, so I told her over the phone to just send the text quickly. I asked why she was being like this and that avoiding it wouldn't solve anything. I pointed out she's not usually late, and that it's best to just do what I said and go. She kept saying 'uh huh, uh huh,' so I asked again if she was going to send the text, and she said 'I don't know.' Then I asked if she was quitting, and what was going on. When I asked if she was going to quit, she got mad, maybe thinking I saw her as incompetent, and hung up. She's been ignoring my calls and texts since then. Seriously, she's 27, turning 28 next year. How much more coddling does she need? Is this my fault? I mean, logically, if you're late, shouldn't you be relieved that you can still go to work and just get reprimanded instead of losing your job? Shouldn't you just rush to go and take the punishment? Is this what a real avoidant personality looks like?