I don't care if you're family, if I'm doing all of your late college coursework that you couldn't be bothered to do on time, writing your essay and doing your final project, I DESERVE to get paid! I am not going to do your degree for free, unless you want to put my name on it instead. I have my own university coursework and I'm busy enough with my double major. You're damn lucky I decided to do it at all.
You can take the F that you earned otherwise.