the_debt_of_time

"Mia!" Lily yelled in shock.
"You horrid, greasy, little bat!" Mia screamed.
"You bitch!" he yelled back up at her, rising to his feet and drawing his wand.
"Expelliarmus!" James shouted, and Snape's wand flew into his hand. "Ten points
from Slytherin for pulling a wand on a fellow prefect." He glared with righteous anger at
the boy, looking like he needed to take a moment to control himself considering Snape had
pulled a wand on Mia.
"She punched me!"
Mia was fuming, a large part of her wanting to hit him again. All her anger and grief
over the summer had reached a boiling point, and Snape had put a target on his face for
daring to speak about her mother's death so flippantly. "To be fair, it's been a few years
since I last punched your face; you were due for another!"
"Ten points from Gryffindor for assaulting another student," James said.
Mia turned and stared openly at her brother in absolute shock. "Wait, what? Jamie,
you heard what he said about Mum!"
"Yes, I did," James affirmed with a stern expression. "Just because he said it doesn't
make it true. Mum would be ashamed to see you resort to violence instead of taking the
high road, or at the very least first planning out something a little more... Slytherin. Not
to mention, you're both prefects and should be setting an example. What if the first years
saw this? In fact, detention for the both of you," he ordered, looking irritated. "Meet with
your Heads of House before the start-of-term feast to schedule it."
"You can't―" Snape began.
James cut him off quickly. "I'm Head Boy, and I can. Mia, get back to the
compartment. Lily and I have patrols to take care of."
"You'll regret this, Potter," Snape growled before storming out of the room.
"I'm sure I will," James muttered quietly.
Mia left the compartment to make sure Snape went directly back to his own. She
would not put it past him to follow after Sirius and Remus to retaliate for what she and
James had done. She kept her Animagus hearing trained on the compartment, listening to
her brother and Lily.
"Potter. Umm, thank you. For... For being fair."