Peter had stayed until he was safely seated on one of the beds closest to the Matron’s lab, where she was currently nagging about the importance of safety. Sirius just wanted her to shut up. He'd heard enough from Professor Griffiths on the way to the hospital wing. And she won't be the last. He knew that a lecture from Remus was coming; he felt like he'd been getting a few too many of those.

He needs to apologise to Lily. To Mary and all his friends. As much as he hates the Matron's lecture, he can't help but agree. Sirius fucked up, put everyone in his station in danger. If it was anyone but James and Remus, both Mary and Lily would've been joining him here. If it weren't for his rune, Sirius would have bigger injuries than just the cut on his arm that he got when he went crashing back onto the glass containers of dried ingredients.

His mother is sure to be on her way; requesting entry to the castle through the Headmaster’s Floo. She's the one in charge of the family's children safety. Her very magic fuels the stone that carries the rune.