"Cause the sign on your heart, said it's still reserved for me,"
'The Doctor's wife' was something the universe liked to keep a secret. When asked if she was real, it might have answered once - when his face hadn't changed as many times and his eyes weren't as aged. His enemies liked to pretend they knew her, but after the loss of Galifray, it seemed she disappeared. Her faces were unknown, and her voice changed. Even the Doctor wouldn't recognise her in a crowded room. In fact, many times, he hadn't.
'The Duchess', or 'Fifi' as she preferred, was a myth, someone who left the universe's eyes for a second, and didn't return for years. Well, until the ToyMaker forces her to reveal herself, and she's thrown back into the arms of her husband.
The Doctor x OC
Based on the BBC show 'Doctor Who'