The lady in the photo was in her 90's when this photo was taken and had long since been a widow. When her daughter took the picture, her mother was in the early stages of dementia and for the days prior, she had been talking out loud to her dead husband.
When this picture was developed the daughter was amazed to see that there was a man standing behind her mother that she hadn't seen with her naked eye when she took the photo. What made the ghost picture all the more amazing was that the man standing behind her mother was clearly the woman's late husband.
To back up her claim the daughter provided black and white photographs of the couple in their younger years to show what her father looked like before he died.