According to a longer report in the Guardian
"Investigators said she was devastated to learn of the abuse, saying she had no recollection whatsoever of being raped. She had been drugged “almost to a state of coma”, investigators added.
“One morning she woke in a panic with a new haircut without understanding how this was possible. She went to her hairdresser, who told her she had been in the previous day,” Babonneau said.
He said his client, now divorced, believed she had an illness nobody could explain and consulted several doctors, always accompanied by her husband, who blamed her symptoms on tiredness after looking after their grandchildren. Her three children and other relatives suspected she had Alzheimer’s disease."
If possible that makes it even worse.