The doppelganger, known amongst its kind as Sereven, groaned when she let that forked tongue run along its cock, but the moment she took it into her mouth his body jerked.  There was no desire to mince words about what sin would be, what evil was.  They were both creatures of necessity, and did whatever was needed of them.  Sereven would reach out to slide its fingers through her hair, seeking a handhold to be able to work her down further along its cock.  "More," it demanded, a snarl escaping its lips.  "Use that mouth and throat of yours like you're supposed to, Lasciel!"<br/><br/>Nearby, of course, there were a few other creatures keeping an eye on things that were happening.  Things that flitted to and fro within the darkness, using it to hide their actions.  The darkness was just more enjoyable for them than the light, even the dim light such as what Lasciel and Sereven were in.  "You should move into the darkness," a voice, soft, melodic, called from the darkness.  "Or would you like us to make darkness for you?"