Crowley keeps ahold of himself long enough to see Aziraphale lose control, to hold him and push him through it, rambling nonsense encouragement and praise all the while without any real awareness of the words. His thrusting eases while he's distracted with watching Aziraphale, feeling the angel's wings trembling against his. Feeling his whole body shake with ecstacy.

If anything on Heaven or Earth is a blessing, this is. Of that he's sure.

But he's wrong, because then Aziraphale collapses on him, clutching, and says I'm yours, and that's it for Crowley. He cries out, suddenly thrusting just a few more times up into Aziraphale, hard and deep, and comes with the word angel in his mouth. And oh God and Satan and everything, it's perfect, it's the most miraculous thing ever to happen, and he shudders in Aziraphale's arm and collapses on him in turn and it's a wonder they don't both just fall over.

But they're supporting each other, balancing each other. As they always have, he thinks, returning to some sort of dizzy awareness.

It's a while before Crowley is able to raise his head enough to meet Aziraphale's eyes, and he's not even aware that his own are wet with tears.