Exactly right - this isn't a one off, she is changing the agreement.
I genuinely don't think she sees how it isn't equitable or fair to me, which must mean she's just not good at math. Oy.
I doubt she has even thought about it. She is used to you putting yourself out to accommodate her and she expects you to continue doing it. Equitable doesn't even factor into the equation. That part isn't relevant to her - her only focus is herself.
There's also the control factor - they seem to not react well when they realise they no longer control us.
Hold tight dbellanon. Let her choke on crickets.
She is such an arsehole.