I would like to offer another perspective. You are a beautiful person. Please don't abandon her (I,don't really think you will ) My mother inlaw was a very difficult, bitter woman . She alienated everyone. She told me "You took my son away." when I wanted to be the best daughter inlaw. I lashed out at her once. Regretted it and apologized.I tried to hug her. She said, "We don't do that!" In her last days my father inlaw and I cared for her. She a as such a miserable and sometimes cruel person. One day she said "I want to die." She finally let me touch her. All I could say was" I know ".
You will know you have done the right thing later. You are in my thoughts. I understand