I havent read all the posts the please forgive if I am repeating someone else's thoughts. I dont know what you should do or what you could do to solve the problems. All i can say is that sometimes when people get older it is quite common to develop something like a Depression or psychosis. Also this can sometimes be an early sign for an old age condition like Alzheimer or Dementia, Parkinsons or others. Your mom seem irrational and crazy....maybe she should be checked for something like that especially if there has been a change in her behaviour.