the_debt_of_time

She had evidently forgotten that Sirius had poured her drink from the laced bottle,
and he used that to his advantage when he asked, in a deceptively casual tone, "So how
long have you two been shagging?"
"Since Halloween." The words spilt out of her mouth before she even fully
processed the question. Mia gasped, covered her mouth, and then turned to glower at
Sirius.
"I knew it! I fucking knew it!" He stood up and kicked over the small ottoman he had
been resting his feet on, feeling the betrayal as it shined through in the heat of his glare. "I
could smell him all over you. I've been smelling it for months!"
"So what?" Mia shouted furiously. "You've been going around shagging every
Ravenclaw, Hufflepuff, and Gryffindor that bats their eyelashes in your direction. I've
never been with anyone but Remus. Is that your problem? That I chose him and not you?"
His skin was hot, burning with anger and covetous energy that felt like lightning
rolling beneath the surface. He remembered the kiss in the secret passageway and how
something inside of him just clicked together the moment he tasted her for the first time.
The look she had in her eyes then was only for him. Her kiss belonged to him. Her words
were his alone.
"You did choose me!"
"And you didn't want me!" Mia yelled, her voice breaking.
Sirius could see her eyes glistening as tears threatened to overflow, and that same
clicking thing inside of him turned into a dull ache at the thought that he had made her cry.
Mia spun on her heel, her hair slapping him across the face in the process as she
fled the room. Before he had a chance to go after her—and he wanted to—the light in the
room shifted, and Sirius was suddenly in Remus's shadow.
"You're such an arsehole."
Sirius stared up accusingly at his too-tall friend. "You told me you split on
Halloween!"
"We did," Remus said with a glare. "Right after the first night we were together. But
she's the closest to perfection I'll ever see unless I find a true mate, and―"
"And that makes it okay to fuck her without actually being her boyfriend?
You're using her!"