I'm going to tell my neighbor not to ask me for help anymore
Why? Has she been asking for help a lot?
She's a really annoying woman. She asks me silly questions quite often.
It's impolite to tell your neighbor that you aren't going to help her anymore. It's good to do things for your neighbors because it makes the neighborhood more friendly.
It's better to be rude than looking silly. I don't care about her feelings.
You might not want to be so rude to her, one day you may need her help with something so it would be good to maintain a cordial relationship with your neighbors.