Are all the vampires obligated to go back to the island once they get an underling? If not, the model girl should have just gotten a blood-bag in form of a manager and the island vampires wouldn't bother her.
Or she's doing some shady shit like using her powers to get ahead in the human world or smth. Also this is the perfect opportunity for stalker class rep and BDSM hunter to team up, because the first definitely followed them. I'm waiting