I loved both your Tonks and your Sirius here. They were great (and believe me, I don't say that if it's not true!)
I started shipping them as soon as I read OotP for the first time (right after it was released). I tried very hard to ship them in my first RPG, but the game's Sirius was all "ew! but they're cousins!" so it never happened (of course, knowing my European history as I do -- including my mom's own family, cousincest at that level is NOT considered taboo in the least!).
A few blasts from my past (none of which you're obligated to read):
I started shipping them as soon as I read OotP for the first time (right after it was released). I tried very hard to ship them in my first RPG, but the game's Sirius was all "ew! but they're cousins!" so it never happened (of course, knowing my European history as I do -- including my mom's own family, cousincest at that level is NOT considered taboo in the least!).
A few blasts from my past (none of which you're obligated to read):
Desperate But Not Sirius (OR I Wanna Be Your Dog) (Sirius/Tonks)
Bizarre Love Triangle (Sirius/Tonks/Harry)
We Fade To Grey (Sirius/Tonks)
Wicked Game (Sirius/Tonks, Remus)
Not Really Even Sex (Bill/Tonks, Tonks/Sirius, Bill/Sirius, Bill/Tonks/Sirius)