"Rosemary Kennedy was JFK’s sister. She suffered from oxygen deprivation at birth and that unfortunately stunted her mental growth. She had a pretty decent childhood, but as she grew older she began to act out. Afraid that her behavior would risk his political career, her father, Joseph, agreed to have her lobotomized. Her mother, Rose, was against it and forbade him from doing it. So he did it behind her back when she went on a trip.
After the operation, Rosemary’s already low IQ was lowered even further, to the point she could no longer walk or communicate. Her family had her locked up in an institution and basically disowned her. They never visited and never publicly acknowledged her anymore. Rosemary died at the age of 86.
Her mother never for gave her husband for what he had done."