I think you should tell her that I have a job that needs to be done to help her to understand her, I hope. Because I do the same when we are busy, but I can give advice to you!
I think you should tell her that I have a job to do to help her, hoping she would understand me. Because I'm too busy. However, I can advise you to do.
I think you should tell her that I have a job to do can't help you, I hope you can understand me. Because I have a busy, too. But I can give you some advice?