I Was Human Once (The Vermilion Countess Series, #2)

As Stella, a vampire assassin with a repressed memory, begins to recall her past, she must dodge both enemies from her memories and present immortal life, that intend to eliminate her. All the while Stella continues working as an operative with her handsome younger handler, Mark, who raises her cougar desires.

When Kent, a fling from her past, wants to leave his Russian spy sleeper cell, Stella must choose between taking him out or keeping him alive, as he holds a major key to her unknown past.