A Pact With Darkness

BLURB: "You drive a very hard bargain, Vivian, I accept your offer."***Those are the words of Leander, a powerful Alpha and brother to the Lycan of the Nightfall nexus pack.
“I'm doing this for my mother, not because I want to.”
Vivian had just sold herself to her not only narcissistic but ruthless uncle. Her father was the Lycan king of the Nightfall nexus pack. Of all the Lycan’s offspring she was the only wolfless one amongst them. She sold herself to save her mother from ridicule.
What happens when her uncle's son forcefully marks her and she discovers that one of her uncle's wives was her highschool rival?