I like that she went, "I'm done," for a relatively minor reason.
How to put this, I feel like people who would double or triple down on a deal like this and only maybe realize the error of their ways when things got extremely bad are sort of over-represented in fictional stories. Which makes sense because that kind of person is going to raise the stakes a lot higher, but also... It feels a lot more real to see a character go, "wait I wasn't expecting someone to threaten to kill me, I'm not that invested in this, this sucks."