What was the title of this Mauraders era fanfic? (See details for description)?

I'm trying to remember the title of this fanfic. It went through the entire mauraders era from year one to Sirius' imprisonment for Pettigrew's murder. I think it had a bit of a Remus focus (one of the main themes was the importance of friendship to him). 

It stayed pretty true to canon although it was written before all the books had come out. I remember the author said she had written it for her brothers and I remember that there was a Sirius/OC pairing that produced a daughter by the end. 

I remember loving it years ago but can't remember the title!