I’m pretty sure she is doing it for monetary gain and/or job security. That being said, it’s really annoying and it really is a form of preying on those not accustomed to being assertive.
It’s a negotiation, it is a good skill to learn, life is full of them. You really just have to stick to your guns, no one is actually forcing you to bend to their will, just coercing.
I’ve been through it, I was mad too, but I later realized I was mad for letting myself get snowballed like that.
I still find that process annoying but now they don’t get anything out of me that I don’t wish to give...for the most part