I'm not going to get out to pump gas for my mother
Why won't you pump gas for your mom?
It really just bugs me. She is so annoying that I just ignore her.
You should always pump gas for your mom if you are with her. It is just a nice gesture and easy to do.
Psh, I don't like doing it. I'd rather be doing something more productive, it's useless when she can do it herself.
If you are in the same car as your mother, it would be rude not to help her since she is taking you somewhere. Also she is your mother and it is nice to  help the person who raised you.