The context of the following conversation is Kai improved Jan's work, but then Jan stopped talking to Kai anyway.:
Kai says I cant believe that she doesn't talk to me even after all that work did for her.
The friend responds She seems to be pretty rude. I know I wouldn't have helped her for free.
Kai responds I think I should have charged her a basic fee upfront but I assumed she was going to pay me after.
The friend responds well I guess you learned a hard lesson this time.