Black's Bastard

Volume One of the Gemini Quartet. AU. Sirius Black was stupid enough to get involved with Madcap Maggie. Now Albus wants Severus to clean up after the prat and play babysitter. Fat chance of that happening - that is, until Severus actually meets the kid, because Lyra Black is not a normal child, not even by wizarding standards. Featuring Mentor!Snape