This is probably gonna sound weird and out of context because it's not about twilight it's about supernatural, I'm looking for a website like this but for supernatural that archieve fanfiction stories, do any of you guys know any good websites? I'll also look for a few twilight stories later. Just hope I won't get any negative response form thiamine question.

Search tv shows/supernatural on fan fiction.net

I've done that, searched on ao3 and fanfiction does not have the story that I'm looking for, it was on ao3, but now I can't seem to find it a top all even though I search for it and I know the summary of it. Also AO3 isn't that great with their forum for chatting.

I did not search the board here but know that  people request help with finding stories there.  I believe that if there is not a board you can start a topic to request what you are looking for.
Go to the top of the page and you will see fanfiction alley.  Search that.

Well the summary is: azazel bites Sam, and Mary leaves john with dean and she takes sam with her to find and kill azael. Azazel is killed by Mary and she raises Sam away from john and dean, while dean is raised by John who is abusive to an extend. Later on Dean married Lisa and joins the army, they have 2 children and dean lost his legs (amputated) from a bonb attack. A few years after that Lisa dies in a car accident and dean is a widower single father who got discharged by the army because of the loss of his legs. Meanwhile Sam is grown up and going to university to become a kindergarten teacher, basically it's a Dean x Sam story, and deans in a wheelchair. It was on AO3. And dean is also an author and when Lisa was alive she had her own yoga studio. Also Mary meets dean later on and dean gets away from her using his wheelchair to wheel away.she got together with bobby to raise Sam.

That's all I remember from the summary.