So a former plate of mine called me today and found out that I was doing online classes. After casually asking me about how much I charge she said she wants to learn too (I'm teaching a language) and asked me how much I'd charge from her.

I didn't think she was serious and I said it wouldn't feel right to charge money from someone that I know quite well. She insisted that she would pay me and I said fine, whatever (I still didn't think she was being serious).

My question is, if she actually wants to have me tutor her, should I agree to let her pay me? I'm doing it as a hobby and will probably stop in a couple months once I get a job as a programmer so it's not like I survive off of it. However she wants to learn for fun too. I also don't expect/want to take her as a plate again so how should I proceed?