Chained — Devin Harnois

Magic user Kevin and newly turned vampire Lucy are locked in a room together. Their master wants Lucy to feed "properly" -- during sex. As new as she is, Lucy can't control herself and they must rely on Kevin's limited magic to stop her in time. Kevin survives, but one night isn't enough.

With Lucy, Kevin is willing to admit he craves the pleasure of a vampire's bite, enough that he's willing to risk his life to feel it again.