I’m afraid I may not be objective on this. As an adult child of a parent who suffered with untreated mental illness, I can say it’s unfair. Adults should devote themselves to any measures necessary to treat their condition if they choose to have children. To me protecting the children is more important than sparing hurt feelings of a sick parent. I wish you and your family all the best. In my situation, no one ever insisted the parent get treatment and her life has been extremely miserable. It’s unfortunate.