Challenge Fic

I've had this idea for a few months now and no idea on how I want to write it. With that being said, I decided to see if anyone else will like to give it a go.

Idea:

Hermione is Snape's only child. Harry is James only child. Lily is both of their mothers. Hermione is Harry's younger sister in theory but older sister in reality. (To clear this up: Lily gets pregnant with Harry before she gets pregnant with Hermione) Lily used a time turner, while pregnant with Hermione, days before her death. No one knew that Lily was pregnant with Severus' baby.

Rules:

- Lily must stay married to James.

- Severus cannot rape Lily.

- Birthdates must stay the same. (I don't care if you change the years, but they must be consistent to what it would be if the years where not changed. (EXAMPLE if you change Hermione's birth year by 5 years you have to change everyone else's by 5 years.)

- Must be post war and follow the books or movies. (The only exception is the end of book 7. For this story to work Severus needs to be alive.)

- Must be during 8th year and Severus must still be teaching potions.

- Hermione can find out the truth in one of two ways (I prefer choice #1). 1) in potions class with the help of a potion 2) a letter from Lily telling her everything (When Hermione finds out I want a letter form Lily explaining everything to Severus at LEAST.)

- I want Hermione to have a concealment charm on her that fades when she finds out the truth.

- I don't care how Harry and Severus react to the news but I want everything to work out in the end. (A little hint…I LOVE DRAMA, but not too much.)

- Pairings will be nice. (Prefer Hermione and Draco, since Severus and Harry are out for this story. Anyone will do but Ron.)

- Don't care what the rating is.

- Ron bashing is very much welcomed and highly recommended. (Sorry to the Ron fans, but I'm allergic to fake people.)

Please PM or review to let me know if you are interested. If someone wants to co-write the story with me then that will be fine. I'm also willing to Beta for this story. Please no longer than a 2 week wait between chapters. It drives people crazy and people start to forget what has happen. Also please no short chapters, it drives me crazy. My idea of a short chapter is less than 1500 words.

A/N: For anyone that is interested in reading a story from this challenge, please check out "Lily Potter's Biggest Secret" by Strong Hermione.