She loved the desire radiating from him, the way that he worked so hard to seem stoic and passive, when she could feel how much he wanted to touch her, kiss her, please her.
"I want to play a little game, Angel. As you obviously have motivation, or at least desire to please... tell me what you wish to do to me, all the ways you would please me, if I freed your hands, and gave you dominion over my body. Imagine I was as you are... helpless, powerless, and oh so willing. How would you treat me?"
Crowley didn't trust his body to be strong enough to fuck, but she was plenty full, after feeding on a few relatively willing humans she'd met on the boards. Her play with the angel was simply to amuse her, to take her high from him as only he could offer, it seemed.