When you text your boss that your running late, the only acceptable response is “Thanks for letting me know”

I was running late to work which is not a regular occurrence so I texted my boss to let her know I would be 10 minutes late. Her response was “Why?”. Why? Because I'm not on time that's why. It's none of your fucking business why. If I need to be “Disciplined” for being late than so be it. But it's none of your fucking business why I'm late.