up to no good

To say Sirius was unimpressed was an understatement, the woman's outburst immediately souring the glimmer of hope and curiosity he'd held since discovering there'd been a Black amongst the Rebel's ranks. And he lived at this address. He hadn’t planned on actually introducing himself to his newfound cousin, still surveying the town and its people under the safety of polyjuice. It hadn't taken him long to notice the presence of Moroi and dhampir. Though small in numbers, any population signalled a dire threat to Sirius' freedom. But he still wished to understand what had come of his family, to learn what had compelled Casper to betray his own bloodline, just like Sirius himself had done. He had to see it for himself, that he might not be alone. But considering the girl's attitude, her words making it clear she lived there too, Sirius wasn't convinced. It didn't help that she seemed familiar, that she happened to look like almost everybody else in her family, assuming he was right.