Something is really strange going on with my 83 year old mother. Last night she told me my dad got in the bed to go to sleep and then she was getting ready to go to bed herself but then she changed her mind when she saw my dad laying in the bed with "his friend". I asked for more info and she said, "This friend of his looks just like your dad, dresses just like your dad, and even drives your dad's car! I told them I'm not getting in the bed with anyone but my husband!" My dad verified there was no one in the bed but him. Is this double vision or Alzheimer's? She claims nothing is wrong and will NOT go to the doctor. My dad's going crazy and doesn't know what to do.