101 chapters? Wow! Well, it's a promising beginning. I like the premise, though I think you should work on making your dialouge a bit more realistic - just think about how people would say things, and write it like that - Molly's well written, but Sirius's lines could have used a little more flow. Stil, I don't want you to think I didn't enjoy this (believe me, I did!). I just figured I'd toss a little concrit in here, because I figure you can take it. ;) Nice start, and I look forward to reading more!

 Oh, and by the way, the second to last paragraph was my favorite bit. Dunno why, it just made me smile. :) Take care!