the_debt_of_time

"That lying werewolf!" Sirius snapped. "Leave it to Remus to bail on his mates and
tell all our secrets to his bloody girlfriend."
"Remus didn't tell me anything. You should always trust Remus, Sirius. If your
secrets aren't being properly kept," said added pointedly, her gaze turning to Peter, "maybe
you have a rat in your midst."
Peter shrivelled before her, looking terrified. "I d-didn't say... Did I?"
"I've told you repeatedly, Peter's a terrible secret keeper; very, very twitchy," she
said, twitching her nose and pointing at it.
James stared wide-eyed at his sister while Sirius glared down at Peter. "You little―"
"Uh oh. Looks like I've accidentally put Peter in the doghouse." She grinned at Sirius
as he suddenly paled at her words, his grey eyes widening.
"Mia.. ." James whispered.
She turned to her brother. "What's wrong, dear? You're looking at me like I've just
sprouted antlers." When James began breathing erratically, she could not contain the
laughter anymore. "Oh calm down, the lot of you!"
"How long have you known?" Sirius yelled.
"About the map or you three becoming Animagi? Illegally, I might add." She stared
at Sirius, as he appeared to be vacillating between amused and furious.
James huffed. "Both."
"I told Sirius years ago that we should have a map of the castle. Plus, I just heard
Peter talking about it a few minutes ago when you didn't know I was here. I assume the
problem is you haven't figured out how to track everyone's movements?"
Despite the fact that James and Sirius remained silent on the matter, Peter spoke
up. "Pretty much." James and Sirius threw him a glare, and he looked away from them
innocently as though he had not even spoken.
"Try a Homonculous Charm." She smiled sweetly at her brother, all hints of malice
and devious mischief gone from her eyes. "I'd offer to show you myself, but it looks to be
a Marauders' thing, so I'll let you three work it out with Remus when he's feeling better."
"Speaking of Remus feeling better.. ." Sirius eyed her. "We're becoming Animagi
to help him. You told me that he should be safe around other animals."
"I know." She smiled, picking up the defensive tone in his voice that she knew he
often used when people he loved were being threatened. "I assumed as much."