First- I have never noticed you rubbing anyone the wrong way. Put that thought out of your head. Stubborn? Maybe so. Now is the time to use your stubborn ways to get through this. You got this Chuck!
Second- You and your mom have got my prayers.
Third- I am sure this is crazy difficult. I am sorry to hear it. You know you can vent here and these guys will be supportive.
Lastly- I don't remember the name, but with chemo there can be some short term "fuzziness". I wouldn't worry as much if your mom isn't as sharp as she was a month ago. Focus on the main health concerns. The chemo treatments can reduce some of the mental sharpness people have. From my understanding, it comes back.