I too can relate. My mom is very angry all the time. I cannot say or do anything right. I do think that she wants to control anything and if she is mean to me and her boyfriend it is because it makes her feel she has the power in the relationship. I don't think she even realizes she does it anymore. It is just her new personality. When I have asked why she is so mad she says she is not mad at me she is mad at the cancer.
It is so hard to deal with trying to do anything possible for a person who, unless you find a cure for cancer, you just can't seem to make happy. I feel guilty when I hang up the phone crying bc of how she speaks to me. What choice do we have. We are not the ones with cancer. I just expect it now.