the_debt_of_time

Her body eventually went slack, but she had little time to recover before Sirius lifted
her against the wall, wrapping her legs around his waist. She could feel him positioning
himself against her entrance, which continued to thrum inside.
"Say you're mine."
Forever.
Mia looked into an endless grey sea of want, and she saw the desperation in his
gaze—the pain and the longing, and the pure and complete need. He was so beautifully
broken, and so was she. Neither entirely qualified to fix the splintered pieces of the other
but they were still going to try.
"I'm yours," she whispered, cupping his face in her hands and kissing him. "All
yours. Forever yours."
Forever, Sirius thought. She said forever... just for me.
The sound of her voice, the taste of her lips, and that devoted look in her eyes was
all the confirmation Sirius needed, and he thrust his hard length inside of her. Burying his
face into her bared shoulder, without thinking, he bit down on the skin beneath his lips.
Mia hissed at the pain that all too quickly gave way to a throbbing, aching pleasure, at least
it sounded like pleasure from the way she started purring. Sirius knew, thanks to an open
friendship and a good amount of firewhisky that she had offered such a privilege to Remus
on multiple occasions, her neck and shoulder bared to the werewolf, but he had always
been too controlled, too afraid.
Sirius, on the other hand, took her, claimed her without her ever needing to offer
or plead for it. He was certain that he wanted it more than she ever could.
Sirius had wanted this time to be perfect and last forever, but Merlin it had been
a year since he had been inside of her, and he had not touched another girl since the
moment Mia had left his bedroom. Too long. Much too long, and Sirius knew it. He could
feel himself pressing hard against a dangerous edge, could feel his body tightening, but he
would be damned if he was going to leave her wanting. Slipping a hand between their
bodies, he stroked her swollen clit, grinning at the way her walls clamped down on his cock
in response.
"Mine," he whispered again, reverently. "Your body is mine, your pleasure is mine―"
"My heart is yours," Mia added, staring deep into his eyes.