Which lover will have to make the ultimate sacrifice to save the other before they both are lost?

Honeymoon Bite by Sharon Hamilton

Anne caught her husband cheating with the maid of Honor before their wedding cake was cut. She decided to take her planned and paid for honeymoon in Tuscany, alone. On the evening of what was to be her wedding night, she gets bitten by a female vampire.

Marcus Monteleone has waited three hundred years to find his fated female, only to discover her dying in his arms. He saves Anne's life by turning her, and then works to gain her trust, to cope with being a newly-formed golden vampire.

But when Anne finds out Marcus has not been completely truthful about his past, she vows to live as a human, and shuns the vampire world. Alone and unprotected, she falls prey to the very villainess who took her human soul, and who now takes the only man she’s ever loved.

Which lover will have to make the ultimate sacrifice to save the other before they both are lost?