The telescope stood abandoned at the edge of the roof, Leo still
visible, the clouds encroaching.

The cold, crisp rain both excited and chilled Tonks as she knelt
comforting her cousin.  The heavens had opened, apparently in sympathy
with Sirius's tears for a lost brother.

The metallic tang of water on her lips was a promise of thunder
later, and she hoped that here, overlooking London, he would likewise find 
vent for his emotions. 

Cruel twist of genetics meant they should never be lovers, but simpler
emotions could always be shared.  That at least could not be taken 
from them.