Oh, this is good!  I like this Sirius.

Love how Mrs. Black actually thinks she can subvert the Sorting and have Sirius put in Slytherin.

And your choice of names: 'Malevala Nott' and 'Finn Potter.'  Yum!

 Mrs. Potter is rarely dscribed in fan-fic.  I like your version of James' mum--er--mother. (Yes, that fits her better.)

Favorite lines, because they reveal a lot about the character in a short bit:

..he rather liked Lily himself.

"Your blood-traitor Gryffindor brother can do it right, so why can't you?...Get to your spell books, boy!"

"I'm not like my family, ma'am..."

"Dear old Mum's finally flipped..."

Thanks for a great read.  I hope to read more of these soon.

Yeah, so this is brilliant. Seriously. Love. Your writing style... reading this, you can just feel the depth. This oozes with personality, love love love.

"You know what they say, don't you?" James asked. "Always pure. I think once you're a Black, you're rather stuck that way."

Brilliant. Just marvelous. I adore your phrasing (though, at one point - I think discussing betrothal? - Sirius said something and you wrote "Sirius retorted" and 'retorted' didn't feel like the proper word).

But I love it. Keep it up, truly.