Topaz Delirium - Department 57, #5

Someone is killing vampires with a new drug and the only people who can discover the source are Svetlana Yevchenko, top model and Jasper, head and chief designer of the House of Lebec and the head of Dept 57 in France. Svetlana wants Jasper, and he wants her. But they can never give in because Jasper is cursed and through all the lives he remembers no woman has survived the curse. An affair might weaken their attraction to each other - or it might strengthen it.
Svetlana is the greatest temptation Jasper has ever tried to resist but their relationship can never be more than sex. As the latest Dept 57 assignment throws them together, their resistance weakens to the point of total, steaming breakdown. The more they fight the attraction, the deeper it gets. But when the assignment is over they must face their fate. Again.