Crowley is a lot of things as a person. One of those things is definitely greedy. He took every second with Aziraphale he could during their time together before the Apocalypse. Long lunches, extended evenings in the bookshop. Every second he could, he stepped into it, filling up Aziraphale's free time. All because he couldn't just tell the angel he wanted to be with him. All because he didn't know how to say that he loved him.

Now, Aziraphale offers him back into the love in his heart and Crowley all but free dives back to him, wanting to swim around in the love he feels from the angel, wanting to give it back to him completely. Yeah, Crowley's a bit greedy, but he can't help it. Nature of the beast and all that. Aziraphale must have known that going in, loving a corrupt demon like him.

His hand around Aziraphale's waist pulls him just a little closer as he deepens the kiss.