No, a demon isn't, and she would do well to remember that. As it is, she's been lifted above all other demons currently living, afforded privileges the others wouldn't dare ask for.

Lucifer's hips snap up into her as hard as she could take it as he urges more screams out of her to make sure she remembered this moment with both him and Gabriel, engraving it on her mind to think of in the future to want more of.

Gabriel, for his part, isn't thinking about any of the things his brother is, focused entirely on his task, her screams of his name, and his own--almost unbearable--need for release. He licks and sucks at her, getting a mix of fluids on his face that he ignores.