I loved it.
and not to be an annoying know-it-all, but Sirius's mother's name wasn't Walberga or whatever you said it was =)
I cant remember how to spell her name... I think it was Andromeda or something. i know it's something along those lines.
I cant wait for the next chapter!
Glad you liked it! It's a one-shot at the moment, so no more chapters unless I get bitten by a plot bunny to keep it going.
Also, according to the HP Lexicon, Walberga is her name: http://www.hp-lexicon.org/wizards/sirius.html
Andromeda was Tonks' mother and sister to Bellatrix and Narcissa, making her a part of the Black family tree and thereby a (favorite) cousin of Sirius.
Thanks for the comment!