Based on Chapter 20:
Alternate; Slash, Established
Castiel/Nathan
Penetrating
"Take your shirt off." Castiel commanded gently.
Nathan did so, first unzipping his sweater then slipping his long sleeve off over head. He dropped them to the floor by his feet.
Castiel did the same; first his coat, then his jacket, tie and shirt. They fell to the floor as well, among Nathan's articles.
Nathan couldn't tear his gaze from Cas's bare chest, just the sight of it turning him hard. The Angel was beautiful, their relationship was forbidden and that just turned him on more, the power that Cas gave off just caused his cock to grow solider and throb with the urge to come almost instantly.
Nathan let out a jagged breath as Castiel reached out, the tip of his fingers gliding across his skin.
Cas stepped to him, undoing the button on Nathan's jeans with the flick of his fingers. His pants puddling at the Winchester's ankles. A smirk touched Cas's lips as he realized that Nathan wasn't wearing any underwear and that saved him time. Cas reached down and grasped Nathan's hard cock, pumping it.
Nathan shuddered and gasp, a hand going to Cas's shoulder as the Angel jerked him off. With his other hand, Nathan undid Cas's pants and the dropped to his ankles, joining Nathan's. He bypassed the Angel's boxer, grasping his cock. He started to pump the organ, Nathan and Cas pumping in sync.
Cas gave a small gasp at the touch, his eyes closing as they drew close, the hand on Nathan's hips tightening—enough so to mark it. Nathan didn't care, it jus made him even hotter and he pumped Cas's dick faster, pressing his forehead to the Angel.
Cas could tell that Nathan was close by the way that he always gave that quiet, strained groan of pleasure. Nathan could tell that Cas was close when he curls his toes, cracking them.
They both tensed, their stomachs coiling as they both came, shooting their load onto each other.
They leaned against each other, panting.
Nathan leaned in and kissed Castiel, his tongue slipping into his moist cavern. Castiel closed his lips around him, sucking on the tip of Nathan's tongue.
Nathan chuckled and kissed the corner of Cas's lips.
