She probably believes it wholeheartedly, I knew a fella many years ago that honestly believed he was a Captain in the British forces during WW2. He was about 35 at the time so would've been born in the 70s. He had tales of being cryogenically frozen by the secret service in the 40s because his knowledge was too important and the Nazis wanted him. He was clearly off his rocker but he believed it all. He's still around now, I saw him a few months ago, homeless at a seaside resort, still requesting people call him Captain Adam.