I had a boss like that once and I don't work there anymore thankfully. Sounds like your boss is even worse though, calling you to fill in dates like that. That kind of blows my mind.

It's very wise of you to consider the fact that she has a boss too, hopefully that give you some peace of mind.

Anyway I'm sorry that your boss sucks, there are plenty of horrible bosses out there. It'll get better for you one day.