Blood War — Suzy Shearer

At 55, Ella Conlan thought her life was completely ordinary, maybe even a little dull, except for having RH-null blood. But she hadn't counted on being the center of a Blood War between two warring factions of vampires. Nor had she counted on being the mate of not one but two handsome vampires.Jarek Hoggarth and his mate, Leon Fenton, are over the moon when they discover the woman with the rare blood group they've been searching for is their bond mate.Now all they have to do is stop her from being killed, rescue her, convince her to donate her blood, and then finally get her to accept that she is destined to spend eternity with the two of them.