"It's ideal, for the time being," Crowley responded. He smirked, and drew his tongue across his lips. He groaned softly, unable to hold back, but unwilling to give her the satisfaction of an outright moan.
Pissing Castiel and Dean off were bonus, as far as Crowley was concerned. he rarely considered either of them, when he considered his relationship with Anna. Pissing Dean off was definitely bonus, he enjoyed watching the older Winchester go off on one of his infantile tirades.