the_debt_of_time

Kneeling on the bed, he faced Mia, who had climbed onto the mattress with him,
her silky robes pooled around her knees. Still looking apprehensive, Remus glanced over
Mia's shoulder again where Sirius was breathing hot against the shell of her ear.
"Kiss him, kitten," Sirius whispered.
As if drugged by his instruction, Mia leant forward and gently brushed her lips
against Remus's, taking in the familiar flavour that was distinctly him. Remus seemed
hesitant at first, but he fell into the kiss all too easily, groaning when her tongue swept
across the seam of his lips, requesting entrance.
Before she even had a chance to, Remus delved his tongue into her mouth, kissing
her greedily. The approaching moon, the Invigoration Draught, and the prospect of death
on the horizon likely added to his lack of inhibitions.
Mia let out a breathy sigh as a shiver ran up her spine. Sirius's fingers had never left
the swell between her thighs. His free hand snaked down to his unbuckled trousers, where
he was already a step ahead of her and Remus; she could feel the motions of him stroking
his length.
When Remus's gaze drifted to Sirius, Mia slipped her hand between them to rub
against the growing hardness in his pyjama bottoms. Remus growled hungrily in response,
but he looked like his mind was racing.
"Tell me," Mia whispered.
"I'm... I'm trying to find a word to describe this."
"The French call it―" Sirius began, but Mia reached back and pinched his thigh.
"Complicated?" she suggested.
Remus laughed softly, running his palms up her arms. "Certainly, but not the right
word. Stressful?"
She leant into his touch as his palm moved from her shoulder to her cheek. "A bit,
but not for the reasons I suppose it should be."
"Uncomfortable?" Remus asked, looking worried.
"I'm feeling pretty fucking good," Sirius muttered.
Mia rolled her eyes, smiling. "Oddly enough, no," she told Remus. "I'm not
uncomfortable."