the_debt_of_time

"If you want to kill Harry, you'll have to kill us, too!" Ron said fiercely and moved
to stand. What little colour he had left in his face drained quickly, and he swayed slightly
as he spoke.
Sirius frowned at the sight. "Lie down, lad. You're going to damage that leg even
more."
"Did you hear me?" Ron demanded weakly, though he was clinging to Harry to stay
upright. "You'll have to kill all three of us!"
"There'll be only one murder here tonight." Sirius scanned Ron's robes in search of
any sign of movement so that he could spot where the rat was hiding.
"Why's that?" Harry spat, trying to wrench himself free from his friends. "Didn't
care last time, did you? Didn't mind slaughtering all those Muggles to get at Pettigrew.
What's the matter, gone soft in Azkaban?"
Sirius shook his head. "Harry, you don't understand―"
"YOU KILLED MY MUM AND DAD!"
Sirius flinched at the accusation, and the last thought that flew through his mind
before his godson punched him in the head and then tackled him to the ground was He has
Mia's fondness for violence.
Harry raged, Ron yelled, and the girl screamed.
Sirius grunted in the struggle, ignoring the fact that the breath had been knocked
out of him by a six-stone scrap of a boy who was very close to reclaiming the wand that
was firmly gripped in Sirius's hands. Sirius tried to think of a harmless way to regain the
upper hand, but everything in his head that he knew to do would end up hurting his godson
and he could not risk that.
He coughed as another of Harry's punches landed in his gut, and instinctively Sirius
reached a hand out and gripped onto anything to stop the attack. What his hand landed
on, however, was Harry's throat.
"No," Sirius growled. "I've waited too long.. ." He tried to push Harry away, not
wanting to actually choke the boy, but he had not had time to put a plan into action when
someone kicked him from behind.
Sirius let go of Harry. With a grunt of pain, he fell to the floor, gasping for breath.
His chest rose and fell rapidly, and he looked up to see Harry standing over him, a wand
aimed at his heart.