"Ahhh!" Sirius moaned. The slide of Remus’s lips and tongue made his mind fuzz as Remus worked him with only his mouth, tightening his lips and pressing his tongue upward against the vein on every plunge. Sirius felt his pleasure peaking, rolling like a building wave about to crash against the shore, and he was torn between allowing it to overtake him or trying to drag out this moment longer. But before he could think about it too long, he felt Remus suck his own finger into his mouth alongside Sirius’s cock. He wet it generously, then pulled it out and pressed it underneath Sirius’s balls, along his perineum, and against his tight, sensitive hole.