You will recognise a good portion of this fan fiction from the Harry Potter novels. I hope that no one minds if I don't mark out every time I use the text from the novels. I acknowledge that I had no part in the creation of Harry Potter, and thus take no credit for the genius included there in.
Prologue
Hermione Granger Wesley had just weeks before said good bye to her first born on platform nine and three quarters for the first time, when things started to go wrong. Ron was hit by an old and dark forgotten curse 'Seminis mali cresre'. The literal translation of which is 'Dark seed grow' each living being has a seed of darkness within it.
She Harry and Ron had all faced and fort the darkness with in them, while Slytherin's locket about their necks. Harry and Hermione had handled it better, if 'Seminis mali cresre' had been cast on ether of them they may have been able to throw it off or at least fight it until they could get treatment. But Ron fell to it in moments, while trying to help his best friend Ron killed the boy who lived. By the end of the day he made his way to Hogwarts and killed Rose. Before managing to go in to hiding with Hugo and the surviving Potter including the boys taken out of school, Ron attacked and killed both James Sirius and Albus Severus. Hermione left Hugo with Ginny and young Lilly, she knew that Ron would never stop looking for her by now and she couldn't risk the rest of her family. She had to draw her now mad husband away for what family that she had left.
With no other hope Hermione used turned to a spell that she had come across while on the run with Harry 'Redire ad principium' it was part of an ancient branch of charms that was somewhat sentient, you never knew just what this kind of charms would do, they did what they thought was best, whatever that might be. She hoped that it would take her back to before Ron had been hit with the curse. 'Redire ad principium' was just as much a ritual as it was a charm, the moment that the idea to use the spell occurred to her she had started to collect what she needed for the ritual part of the spell. It hadn't taken her long to get everything she needed. The ritual took three hours and the wand movements the most complicated that she had ever seen.
"Redire ad principium," Hermione called out as she made the movements the flash of cornflower blue light.
Then darkness and calm warmth and after some time sounds a whooshing pulsing that was much like the white noise generator that her mother that had put in her basinet when she was a baby and voices ones she didn't know. The generator was supposed recreate the sounds of the womb. So that was where she figured she was. The voice was not her mother's nor was the male voice that she heard her fathers.
Soon enough she realised that there was another in this sanctuary with her, and realised that her ability to reason was diminished
When the time came for her and her new twin brother to be born she understood what the spell had done, for her new twin brother was Harry Potter her mother Lilly Evans Potter and her father James Potter. The spell had sent back to be Harry Potter's twin sister.