Crowley positions himself and slowly begins to slide himself in, letting out a moan at the sensation against Aziraphale's neck.

He feels him, he feels him all around him as he enters him, and he feels him in his arms, against his neck, surrounding his soul. He can't think of a time in his entire life that he has ever been happier.

The whole of Heaven and Hell can't take this from them. They have this, they have this moment together, in each other's arms. They have their love that fear and strife can't take from them. They have it together.