Steve doesn't want to look away from Tony's face. The expression he's got, the flush, the desperate excitement; the whole picture sends a thrill of uncomplicated joy through him. There is so little in their lives that does that.

He's got his right hand curled around the base of Tony's erection still, but as he bobs his head and takes more and more of him down, he moves to stroke his hip and abdomen instead. He fancies he can feel the muscles quivering, tense beneath his fingers.

His eyes fall completely shut for a moment as he moans, the timbre and pitch just low enough to thrum against the cock in his mouth. He can't smile while he's occupied with this--at least not with his mouth--but he sort of wants to.